WO2001000603A1 - Thiazole and oxazole derivatives and their pharmaceutical use - Google Patents

Thiazole and oxazole derivatives and their pharmaceutical use Download PDF

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Publication number
WO2001000603A1
WO2001000603A1 PCT/EP2000/005720 EP0005720W WO0100603A1 WO 2001000603 A1 WO2001000603 A1 WO 2001000603A1 EP 0005720 W EP0005720 W EP 0005720W WO 0100603 A1 WO0100603 A1 WO 0100603A1
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WO
WIPO (PCT)
Prior art keywords
methyl
phenyl
trifluoromethyl
thiazol
sulfanyl
Prior art date
Application number
PCT/EP2000/005720
Other languages
French (fr)
Inventor
Esther Yu-Hsuan Chao
Curt Dale Haffner
Millard Hurst Lambert, Iii
Patrick Reed Maloney
Michael Lawrence Sierra
Daniel David Sternbach
Marcos Luis Sznaidman
Timothy Mark Willson
Huaqiang Eric Xu
Françoise Jeanne GELLIBERT
Original Assignee
Glaxo Group Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP00943847A priority Critical patent/EP1189895B8/en
Priority to PL00353135A priority patent/PL353135A1/en
Application filed by Glaxo Group Limited filed Critical Glaxo Group Limited
Priority to DE60020701T priority patent/DE60020701T2/en
Priority to DK00943847T priority patent/DK1189895T3/en
Priority to NZ515676A priority patent/NZ515676A/en
Priority to AT00943847T priority patent/ATE297384T1/en
Priority to JP2001507012A priority patent/JP3490704B2/en
Priority to MXPA01013244A priority patent/MXPA01013244A/en
Priority to IL14663400A priority patent/IL146634A0/en
Priority to CA002377126A priority patent/CA2377126C/en
Priority to BR0011891-5A priority patent/BR0011891A/en
Priority to AU58171/00A priority patent/AU765347B2/en
Priority to US10/018,935 priority patent/US6710063B1/en
Priority to SI200030735T priority patent/SI1189895T1/en
Publication of WO2001000603A1 publication Critical patent/WO2001000603A1/en
Priority to IL146634A priority patent/IL146634A/en
Priority to NO20016078A priority patent/NO321872B1/en
Priority to HK02104378.2A priority patent/HK1042897B/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
    • C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
    • C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D277/22—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
    • C07D277/26—Radicals substituted by sulfur atoms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/04—Anorexiants; Antiobesity agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/06—Antihyperlipidemics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P5/00—Drugs for disorders of the endocrine system
    • A61P5/48—Drugs for disorders of the endocrine system of the pancreatic hormones
    • A61P5/50—Drugs for disorders of the endocrine system of the pancreatic hormones for increasing or potentiating the activity of insulin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
    • A61P7/02—Antithrombotic agents; Anticoagulants; Platelet aggregation inhibitors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/04—Inotropic agents, i.e. stimulants of cardiac contraction; Drugs for heart failure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/12—Antihypertensives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
    • C07D263/02—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings
    • C07D263/30—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D263/32—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
    • C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
    • C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D277/22—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
    • C07D277/24—Radicals substituted by oxygen atoms

Definitions

  • the present invention relates to certain novel compounds.
  • the present invention relates to compounds that activate the delta subtype of the human peroxisome proliferator activated receptor ("hPPAR ⁇ ").
  • the present invention also relates to method for preparing and using the novel compounds and to methods for using activators of hPPAR ⁇ .
  • HMG CoA reductase inhibitors are useful for treating conditions characterized by high LDL-c levels. It has been shown that lowering LDL-c is not sufficient for reducing the risk of cardiovascular disease in some patients, particularly those with normal LDL-c levels. This population pool is identified by the independent risk factor of low
  • HDL-c The increased risk of cardiovascular disease associated with low HDL-c levels has not yet been successfully addressed by drug therapy (i.e. currently there are no drugs on the market that are useful for raising HDL-c) .
  • Syndrome X (including metabolic syndrome) is loosely defined as a collection of abnormalities including hyperinsulinemia, obesity, elevated levels of trigycerides, uric acid, fibrinogen, small dense LDL particles, and plasminogen activator inhibitor 1 (PAI-1), and decreased levels of HDL-c.
  • NIDDM non insulin dependent or Type 2 diabetes mellitus
  • ITT impaired glucose tolerance
  • PPAR-alpha Three mammalian Peroxisome Proliferator-Activated Receptors have been isolated and termed PPAR-alpha, PPAR-gamma, and PPAR-delta (also known as NUC1 or PPAR-beta). These PPARs regulate expression of target genes by binding to DNA sequence elements, termed PPAR response elements (PPRE).
  • PPRE PPAR response elements
  • PPRE's have been identified in the enhancers of a number of genes encoding proteins that regulate lipid metabolism suggesting that PPARs play a pivotal role in the adipogenic signaling cascade and lipid homeostasis (H. Keller and W. Wahli, Trends Endoodn. Met 291-296, 4 (1993)). It has now been reported that thiazolidinediones are potent and selective activators of PPAR-gamma and bind directly to the PPAR-gamma receptor (J.
  • Activators of the nuclear receptor PPAR ⁇ gamma have been shown in the clinic to enhance insulin-action, reduce serum glucose and have small but significant effects on reducing serum triglyceride levels in patients with Type 2 diabetes. See, for example, D. E. Kelly et al., Curr. Opin. Endocrinol. Diabetes, 90-96, 5 (2), (1998); M. D. Johnson et al., Ann. Pharmacother., 337-348, 32 (3), (1997); and M. repelnegger et al., Curr. Then Res., 403-416, 58 (7), (1997).
  • VLDL very low density lipoproteins
  • LPL liporotein lipase
  • Fibrates are a class of drugs which may lower serum triglycerides 20- 50%, lower LDLc 10-15%, shift the LDL particle size from the more atherogenic small dense to normal dense LDL, and increase HDLc 10-15%.
  • Experimental evidence indicates that the effects of fibrates on serum lipids are mediated through activation of PPAR ⁇ . See, for example, B. Staels et al., Curr. Pharm. Des., 1-14, 3 (1 ), (1997).
  • Activation of PPAR alpha results in transcription of enzymes that increase fatty acid catabolism and decrease de-novo fatty acid synthesis in the liver resulting in decreased triglyceride synthesis and VLDL production/secretion.
  • PPAR alpha activation decreases production of apoC-lll.
  • X represents a COOH (or a hydrolysable ester thereof) or tetrazole group
  • X 1 represents NH, NCH 3 , O, S, a bond (i.e. is absent), CH 2 , or CH where the dashed line indicates that when X 1 is CH the depicted bond is a double bond;
  • X 2 represents O or S
  • R 1 and R 2 independently represent H, CH 3 , OCH 3 , or halogen; n is 1 or 2; one of Y and Z is N and the other is S or O: y is O, 1 , 2, 3, 4 or 5;
  • Each R 3 independently represents CF 3 or halogen.
  • the present invention discloses a method for prevention or treatment of a human PPAR delta ("hPPAR ⁇ ”) mediated disease or condition comprising administration of a therapeutically effective amount of a compound of this invention.
  • hPPAR ⁇ mediated diseases or conditions include dyslipidemia including associated diabetic dyslipidemia and mixed dyslipidemia, syndrome X (as defined in this application this embraces metabolic syndrome), heart failure, hypercholesteremia, cardiovascular disease including atherosclerosis, arteriosclerosis, and hypertriglyceridemia, Type 2 diabetes mellitus, Type I diabetes, insulin resistance, hyperlipidemia, and regulation of appetite and food intake in subjects suffering from disorders such as obesity, anorexia bulimia, and anorexia nervosa.
  • the compounds of this invention are useful in the treatment and prevention of cardiovascular diseases and conditions including atherosclerosis, arteriosclerosis, hypertriglyceridemia, and mixed dyslipidaemia.
  • the present invention provides pharmaceutical compositions comprising a compound of the invention, preferably in association with a pharmaceutically acceptable diluent or carrier.
  • the present invention provides a compound of the invention for use in therapy, and in particular, in human medicine.
  • the present invention provides the use of a compound of the invention for the manufacture of a medicament for the treatment of a hPPAR ⁇ mediated disease or condition.
  • the present invention provides a method for lowering triglycerides by administration of a hPPAR ⁇ agonist.
  • a hPPAR ⁇ agonist is a selective agonist.
  • the present invention provides the use of a hPPAR ⁇ agonist for the manufacture of a medicament for lowering triglyceride levels.
  • the hPPAR ⁇ agonist is a selective agonist.
  • the present invention provides a method for treating Type 2 diabetes, decreasing insulin resistance or lowering blood pressure comprising administering a hPPAR ⁇ agonist.
  • a hPPAR ⁇ agonist is a selective agonist.
  • a hPPAR ⁇ agonist for the manufacture of a medicament for treating Type 2 diabetes, decreasing insulin resistance or lowering blood pressure.
  • the hPPAR ⁇ agonist is a selective agonist.
  • the invention provides a method for decreasing fibrinogen levels comprising administering a hPPAR ⁇ agonist.
  • the hPPAR ⁇ agonist is a selective agonist.
  • a hPPAR ⁇ agonist for the manufacture of a medicament for decreasing fibrinogen levels.
  • the hPPAR ⁇ agonist is a selective agonist.
  • the invention provides a method for decreasing LDLc levels comprising administering a hPPAR ⁇ agonist.
  • a hPPAR ⁇ agonist is a selective agonist.
  • the invention provides the use of a hPPAR ⁇ agonist for the manufacture of a medicament for decreasing LDLc levels.
  • a hPPAR ⁇ agonist is a selective agonist.
  • the invention provides a method for shifting the LDL particle size from small dense to normal dense LDL comprising administering a hPPAR ⁇ agonist.
  • the hPPAR ⁇ agonist is a selective agonist.
  • the invention provides the use of a hPPAR ⁇ agonist for the manufacture of a medicament for shifting the LDL particle size from small dense to normal dense LDL.
  • the hPPAR ⁇ agonist is a selective agonist.
  • a compound of the invention means a compound of formula (I) or a pharmaceutically acceptable salt or, solvate, thereof.
  • esters and tetrazole derivatives are included in the scope of this invention, the acids are preferred because the data suggests that while the esters are useful compounds, it may actually be the acids to which they hydrolyze that are the active compounds.
  • Esters that hydrolyze readily can produce the carboxylic acid in the assay conditions or in vivo. Generally the carboxylic acid is active in both the binding and transient transfection assays, while the ester does not usually bind well but is active in the transient transfection assay presumably due to hydrolysis.
  • Preferred hydrolysable esters are C ⁇ alkyl esters wherein the alkyl group may be straight chain or branched chain. Methyl or ethyl esters are more preferred.
  • X represents COOH
  • X 1 is O, S, or is absent. More preferably X 1 represents O.
  • X 2 is S.
  • R 1 is H or CH 3 , more preferably CH 3 .
  • R 2 is H.
  • Z is N.
  • Y is S.
  • n is 1.
  • y is 1 or 2.
  • one of the substituents is halogen; more preferably one is halogen and the other is CF 3 . More preferably y is 1.
  • y is 1 , preferably the substituent is in the para position on the ring and is more preferably CF 3 .
  • a particular group of compounds is compounds of formula (II), and pharmaceutically acceptable salts, solvates, and hydrolyzable esters thereof, wherein
  • X 1 is NH, NCH 3 , O, S, a bond (i.e. is absent), CH 2 , or CH where the dashed line indicates that when X 1 is CH the depicted bond is a double bond; X 2 is O or S;
  • R 1 is H, CH 3 , OCH 3 , or halogen
  • R 2 is H, OCH 3 , or halogen n is 1 or 2
  • one of Y and Z is N and the other is S or O
  • R 3 is H, CF 3 or halogen.
  • preferred compounds of this invention include those in which several or each variable in Formula (I) is selected from the preferred, more preferred, or most preferred groups for each variable.
  • this invention is intended to include all combinations of preferred, more preferred, and most preferred groups.
  • the compounds of formula (I) are hPPAR ⁇ agonists.
  • agonist or “activating compound”, or “activator”, or the like, is meant those compounds which have a pKi of at least 6.0, preferably at least 7.0, to the relevant PPAR, for example hPPAR ⁇ , in the binding assay described below, and which achieve at least 50% activation of the relevant PPAR relative to the appropriate indicated positive control in the transfection assay described below at concentrations of 10 '5 M or less.
  • the agonist of this invention achieve 50% activation of human PPAR ⁇ in the transfection assay at concentrations of 10 "7 M or less, more preferably 10 "9 M or less.
  • the compounds of formula (I) are selective hPPAR ⁇ agonists.
  • a "selective hPPAR ⁇ agonist” is a hPPAR ⁇ agonist whose EC50 for PPAR ⁇ is at least 10 fold lower than its EC50 for PPAR ⁇ and PPAR ⁇ . Such selective compounds may be referred to as "10-fold selective.”
  • EC50 is defined in the transfection assay described below and is the concentration at which a compound achieves 50% of its maximum activity. Most preferred compounds are greater than 100-fold selective hPPAR ⁇ agonists.
  • the PPAR ⁇ selective compounds of this invention elevate HDL-c in db/db mice and primate models and lower fibrinogen in primate models. These PPAR ⁇ selective agonists unexpectedly lower triglycerides and insulin levels in the primate.
  • Preferred compounds of the present invention include:
  • More preferred compounds of the invention are:
  • a particularly preferred compound of the invention is:
  • the compounds of the present invention may also be utilized in the form of a pharmaceutically acceptable salt or solvate thereof.
  • physiologically acceptable salts of the compounds of formula (I) include conventional salts formed from pharmaceutically acceptable inorganic or organic acids or bases as well as quaternary ammonium acid addition salts.
  • suitable acid salts include hydrochloric, hydrobromic, sulfuric, phosphoric, nitric, perchloric, fumaric, acetic, propionic, succinic, glycolic, formic, lactic, maleic, tartaric, citric, palmoic, malonic, hydroxymaleic, phenylacetic, glutamic, benzoic, salicylic, fumaric, toluenesulfonic, methanesulfonic, naphthalene-2-sulfonic, benzenesulfonic hydroxynaphthoic, hydroiodic, malic, steroic, tannic and the like.
  • acids such as oxalic, while not in themselves pharmaceutically acceptable, may be useful in the preparation of salts useful as intermediates in obtaining the compounds of the invention and their pharmaceutically acceptable salts.
  • suitable basic salts include sodium, lithium, potassium, magnesium, aluminium, calcium, zinc, N.N'-dibenzylethylenediamine, chloroprocaine, choline, diethanolamine, ethylenediamine, N-methylglucamine and procaine salts.
  • solvates For example, a complex with water is known as a "hydrate”.
  • Solvates of the compound of formula (I) are within the scope of the invention. References hereinafter to a compound according to the invention include both compounds of formula (I) and their pharmaceutically acceptable salts and solvates.
  • treatment extends to prophylaxis as well as the treatment of established diseases or symptoms.
  • amount of a compound of the invention required for use in treatment will vary with the nature of the condition being treated and the age and the condition of the patient and will be ultimately at the discretion of the attendant physician or veterinarian.
  • doses employed for adult human treatment will typically be in the range of 0.02-5000 mg per day, preferably 1-1500 mg per day.
  • the desired dose may conveniently be presented in a single dose or as divided doses administered at appropriate intervals, for example as two, three, four or more sub-doses per day.
  • the present invention further provides for a pharmaceutical formulation comprising a compound of formula (I) or a pharmaceutically acceptable salt or solvate thereof together with one or more pharmaceutically acceptable carriers therefor and, optionally, other therapeutic and/or prophylactic ingredients.
  • Formulations of the present invention include those especially formulated for oral, buccal, parenteral, transdermal, inhalation, intranasal, tra ⁇ smucosal, implant, or rectal administration, however, oral administration is preferred.
  • the formulation may take the form of tablets or lozenges formulated in conventional manner.
  • Tablets and capsules for oral administration may contain conventional excipients such as binding agents, (for example, syrup, acacia, gelatin, sorbitol, tragacanth, mucilage of starch or polyvinylpyrrolidone), fillers (for example, lactose, sugar, microcrystalline cellulose, maize-starch, calcium phosphate or sorbitol), lubricants (for example, magnesium stearate, stearic acid, talc, polyethylene glycol or silica), disintegrants (for example, potato starch or sodium starch glycollate) or wetting agents, such as sodium lauryl sulfate.
  • binding agents for example, syrup, acacia, gelatin, sorbitol, tragacanth, mucilage of starch or polyvinylpyrrolidone
  • fillers for example, lactose, sugar, microcrystalline cellulose, maize-starch, calcium phosphate or sorbitol
  • lubricants
  • the compounds of the present invention may be incorporated into oral liquid preparations such as aqueous or oily suspensions, solutions, emulsions, syrups or elixirs, for example.
  • formulations containing these compounds may be presented as a dry product for constitution with water or other suitable vehicle before use.
  • Such liquid preparations may contain conventional additives such as suspending agents such as sorbitol syrup, methyl cellulose, glucose/sugar syrup, gelatin, hydroxyethylcellulose, carboxymethyl cellulose, aluminum stearate gel or hydrogenated edible fats; emulsifying agents such as lecithin, sorbitan mono-oleate or acacia; non- aqueous vehicles (which may include edible oils) such as almond oil, fractionated coconut oil, oily esters, propylene glycol or ethyl alcohol; and preservatives such as methyl or propyl p-hydroxybenzoates or sorbic acid.
  • Such preparations may also be formulated as suppositories, e.g., containing conventional suppository bases such as cocoa butter or other glycerides.
  • formulations of the present invention may be formulated for parenteral administration by injection or continuous infusion.
  • Formulations for injection may take such forms as suspensions, solutions, or emulsions in oily or aqueous vehicles, and may contain formulatory agents such as suspending, stabilizing and/or dispersing agents.
  • the active ingredient may be in powder form for constitution with a suitable vehicle (e.g., sterile, pyrogen-free water) before use.
  • the formulations according to the invention may also be formulated as a depot preparation. Such long acting formulations may be administered by implantation (for example, subcutaneously or intramuscularly) or by intramuscular injection. Accordingly, the compounds of the invention may be formulated with suitable polymeric or hydrophobic materials (as an emulsion in an acceptable oil, for example), ion exchange resins or as sparingly soluble derivatives as a sparingly soluble salt, for example.
  • the formulations according to the invention may contain between 0.1- 99% of the active ingredient, conveniently from 30-95% for tablets and capsules and 3-50% for liquid preparations.
  • the compound of formula (I) for use in the instant invention may be used in combination with other therapeutic agents for example, statins and/or other lipid lowering drugs for example MTP inhibitors and LDLR upregulators.
  • the compounds of the invention may also be used in combination with antidiabetic agents, e.g. metformin, sulfonylureas, or PPAR gamma, PPAR alpha and PPAR alpha/gamma agonists (for example thiazolidinediones such as e.g. Pioglitazone and Rosiglitazone).
  • the compounds may also be used in combination with antihypertensive agents such as angiotensin antagonists eg telmisartan, calcium channel antagonists eg lacidipine and ACE inhibitors eg enalapril .
  • antihypertensive agents such as angiotensin antagonists eg telmisartan, calcium channel antagonists eg lacidipine and ACE inhibitors eg enalapril .
  • the invention thus provides in a further aspect the use of a combination comprising a compound of formula (I) with a further therapeutic agent in the treatment of a hPPAR delta mediated disease.
  • the compounds of formula (I) When used in combination with other therapeutic agents, the compounds may be administered either sequentially or simultaneously by any convenient route.
  • compositions comprising a combination as defined above optimally together with a pharmaceutically acceptable carrier or excipient comprise a further aspect of the invention.
  • the individual components of such combinations may be administered either sequentially or simultaneously in separate or combined pharmaceutical formulations.
  • the two compounds When combined in the same formulation it will be appreciated that the two compounds must be stable and compatible with each other and the other components of the formulation and may be formulated for administration. When formulated separately they may be provided in any convenient formulation, conveniently in such a manner as are known for such compounds in the art.
  • each compound may differ from that when the compound is used alone.
  • Appropriate doses will be readily appreciated by those skilled in the art.
  • Compounds of this invention may be conveniently prepared by a general process wherein a moiety like A is coupled to an alcohol (B) using the Mitsunobu protocol (O. Mitsunobu, 1981 Synthesis, p 1 ) or by alkylation of A using a suitable non nucleophilic base such as K 2 CO 3 , Cs 2 CO 3 or NaH, with an alkyl halide (C).
  • this synthesis is preferably carried out with the acid group protected by R.
  • R is 1-6 alkyl which can be hydrolyzed off to give an acid of Formula (I), or if readily hydrolyzable, the resulting ester can be administered.
  • n is1
  • Y is S
  • Z is N
  • R 3 is para-CF 3
  • the tetrazole derivatives may be conveniently prepared by a general process wherein a moiety like D is coupled to an alcohol (B) using the Mitsunobu protocol (O. Mitsunobu, 1981 Synthesis, p 1 ), by alkylation of D using a suitable non nucleophilic base such as K 2 CO 3 , Cs 2 CO 3 or NaH, with an alkyl halide (C) or by coupling of a moiety like E with an alkyl halide (C) using a suitable non nucleophilic base such as NaOH.
  • a suitable non nucleophilic base such as K 2 CO 3 , Cs 2 CO 3 or NaH
  • n is1
  • Y is S
  • Z is N
  • R 3 is para-CF 3
  • reaction mixture was diluted with CH 2 CI 2 (120 mL) and washed with NaHCO 3 (sat.) (2 x 240 mL) and water (2 x 240 mL), dried, filtered and evaporated to afford intermediate 2 (8.0 g, 27 mmol, 90%) as a yellow solid.
  • reaction mixture was diluted with CH 2 CI 2 (40 mL) and washed with NaHCO 3 (sat.) (2 x 80 mL) and water (2 x 80 mL), dried, filtered and evaporated to afford intermediate 5 (2.8 g, 10 mmol, 100%) as a yellow solid.
  • N-Methylanisidine (2.0 g, 15 mmol),methyl bromoacetate (2.25 g, 15 mmol), DMAP (0.04 g, 2% by wt), and Net 3 (2.25 g, 15 mmol) in EtOH (50 mL) was refluxed for 1 h. The solvents were evaporated. The remaining residue was chromatographied on a silica gel column with 10% EtOAc in hexanes to afford the title compound (70%) as a yellow oil: NMR (DMSO-d6) ⁇ 2.97 (s, 3H), 3.66(s,
  • Methyl 2-(4-hydroxyphenoxy)acetate was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford, after column chromatography (hexane: EtOAc, 4:1 ), (84 %) as a yellow oil.
  • the oil was refluxed in tetradecane as to afford after column chromatography (hexane:EtOAc, 4:1 ) the title compound (53 %) as a yellow oil.
  • Methyl 4-hydroxyphenylacetate was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford, after column chromatography (hexane:EtOAc, 4:1 ) (90 %) a yellow solid.
  • the solid was refluxed in tetradecane to afford after column chromatography (hexane:EtOAc,
  • Methyl 3-methoxy-4-hydroxyphenylacetate was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford, after column chromatography (hexane:EtOAc, 4:1 ), a brown oil (95 %). The oil was refluxed in tetradecane to afford after column chromatography (hexane:EtOAc, 4:1 ) compound the title compound (17 %) as a yellow oil.
  • Rf of starting alcohol in 3:1 hexanes/ethyl acetate is 0.25
  • Rf of chloride in 3:1 hexanes/ethyl acetate is 0.75
  • Example 1 was hydrolyzed as described in the general procedure 3 to afford the title compound (74 %) as a solid: mp 149 -150°C.
  • Example 3 was hydrolyzed as described in the general procedure 3 to afford the-title compound (72 %) as a solid: mp 172 -174°C.
  • Example 5 was hydrolyzed as described in the general procedure 3 to afford the title compound (73 %) as a solid: mp 150-152°C.
  • Example 7 3-[4-( ⁇ 4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl ⁇ methoxy)phenyl]propanoic acid
  • Example 7 was hydrolyzed as described in the general procedure 3. The crude material was crystallized from acetone: hexane to afford the title compound (85 %) as a white solid: mp 98-100°C.
  • Example 9 was hydrolyzed as described in the general procedure to afford the title compound (45 %) as a white solid: mp 142-147°C. HPLC showed one peak at 3.942 min.
  • Example 11 was hydrolyzed as described in the general procedure 3 to afford the title compound (43 %) as a white solid: mp 136-138°C.
  • Example 13 was hydrolyzed as described in general procedure 3 to afford the title compound (85 %) as a white solid: mp 128-130°C.
  • Example 15 was hydrolyzed as described in the general procedure 3 to afford the title compound (82 %) as a white solid: mp 134-135°C.
  • Example 17 was hydrolyzed as described in the general procedure. The crude material was crystallized from acetone:water to afford the title compound
  • Example 21 was hydrolyzed as described in the general procedure 3 to afford the title compound (92 %) as a white solid: mp 193°C. HPLC showed one peak at 3.689 min.
  • Example 23 was hydrolyzed as described in general procedure 3 to afford the title compound (67 %) as a solid: mp 162 -163°C.
  • Anal. Calcd. for C ManualH n NO 5 F 3 C, 60.69; H, 4.63; N, 3.22. Found: C,
  • Example 25 was hydrolyzed as described in general procedure 3. The crude material was crystallized from EtOAc:hexane to afford the title compound
  • Example 27 was hydrolyzed as described in the general procedure to afford the title compound (97 %) as white solid: mp 155-165°C. HPLC showed one peak at 3.579 min.
  • Example 29 was hydrolyzed as described in the general procedure 3. The crude material was crystallized from acetone:hexane to afford the title compound
  • Example 31 was hydrolyzed as described in general procedure 3. The crude material was crystallized from acetone:water to afford the title compound (97 %) as a white solid: mp 128-130°C
  • Example 33 was hydrolyzed as described in the general procedure 3 to afford the title compound (20%) as a yellow solid.
  • Example 35 was hydrolyzed as described in general procedure 3 to afford the title compound (90 %) as a white solid: mp 126-127°C
  • Example 37 was hydrolyzed as described in general procedure 3 to afford the title compound (45%) as a yellow solid: mp 124-126 C; 1 H-NMR (acetone-d6) ⁇ 2.47 (s, 3H), 3.09(s, 3H), 408(s, 2H),5.25 (s, 2H), 6.70(d, 2H),
  • Example 39 was hydrolyzed as described in general procedure 3 to afford the title compound (46 %) as white solid: mp 158-160°C
  • Example 41 was hydrolyzed as described in general procedure 3 to afford the title compound (68 %) as yellow solid: mp 131-133°C
  • Example 43 was hydrolyzed as described in general procedure 3 to give crude material, that was purified by flash column chromatography (CHCI 3 :MeOH, 9:1 ) and then crystallized from ether to afford the title compound (50 %) as a white solid: mp 138-140°C. HPLC showed one peak at 3.580 min. Calcd. Mass for C 20 H 16 NO 4 F 3 S: (M + 1 ) + : 424.0830. Found (H.R.M.S): 424.0821.
  • Example 45 was hydrolyzed as described in general procedure 3. The crude material was crystallized from MeOH:water to afford the title compound (90%) as a yellow solid: mp 136-137°C
  • Example 47 was hydrolyzed as described in general procedure 3 to afford the title compound (78 %) as white solid: mp 202-203°C
  • Example 49 was hydrolyzed as described in general procedure 3 to afford the title compound (73 %) as a white solid: mp 189-191 °C
  • Example 51 was hydrolyzed as described in general procedure 3 to afford the title compound (21 %) as white solid: mp 181-182°C Anal. Calcd. for C 21 H 18 NO 3 F 3 S 2 0.25 HCI: C, 54.52; H, 3.98; N, 3.03.
  • Example 53 was hydrolyzed as described in general procedure 3 to afford the title compound (64%) as a yellow solid: mp 174-176°C
  • Example 59 was hydrolyzed as described in the general procedure. The crude material was crystallized from acetone:hexane to afford the title compound (96%) as white solid:
  • Example 61 was hydrolyzed as described in general procedure 3. The crude material was crystallized from acetone:hexane to afford the title compound (50 %) as yellow solid: mp 190°C.
  • Anal. Calcd. for C 20 H 16 NO 3 F 3 S 2 C, 54.66; H, 3.67; N, 3.19; S, 14.59. Found: C, 54.45; H, 3.71 ; N, 3.02; S, 14.83.
  • Example 63 was hydrolyzed as described in general procedure 3. The crude material was crystallized from MeOH:water to afford the title compound (67 %) as white solid: mp 156-157°C
  • Example 65 was hydrolyzed as described in general procedure 3. The crude material was crystallized from MeOH:water to afford the title compound (60 %) as yellow solid: mp 139-141 °C
  • Example 68 was hydrolyzed as described in general procedure 3. The crude material was chromatographed C ⁇ CI ⁇ MeOH (85:15) to afford the title compound (59%) as white solid: mp >250°C.
  • Example 70 ethyl 2- 2-methyl-4-[( ⁇ 4-methyl-2-[4-chlorophenyl]-1,3-thiazol-5- yl ⁇ methyl)sulfanyl]phenoxy ⁇ acetate
  • Intermediate 48 and intermediate 54 were coupled as described for example 67.
  • the crude material was chromatographed petroleum ether/EtOAc (90:10) to afford the title compound (53%) as clear oil that solidified upon standing.
  • Example 70 was hydrolyzed as described in general procedure 3. The crude material was crystallized from acetonotrile to afford the title compound (73%) as a pale yellow solid: mp 109°C.
  • Example 72 was hydrolyzed as described in general procedure 3 to afford the title compound (73%) as yellow foam: mp 45-46°C.
  • Example 74 was hydrolyzed as described in general procedure 3. The crude material was precipitated from ether to afford the title compound (75%) as a white solid: mp 143°C. Anal. Calcd. for C 20 H 17 CI 2 NO 3 S 2 cramp0.2H 2 O: C, 52.03; H, 3.75; N, 3.03; S,
  • Example 76 was hydrolyzed as described in general procedure 3. The crude material was crystallized from acetonitrile to afford the title compound (77%) as yellow solid: mp 119°C. MS m/z 422 (M+1 )
  • Example 78 was hydrolyzed as described in general procedure 3. The crude material was precipitated from ether to afford the title compound (89%) as a white solid: mp 178°C.
  • Example 80 was hydrolyzed as described in general procedure 3. The crude material was precipitated from ether to afford the title compound (81 %) as a yellow foam: mp ⁇ 50°C.
  • PPAR ligand binding domain (LBD) was expressed in E. coli as polyHis tagged fusion proteins and purified. The LBD was then labeled with biotin and immobilized on streptavidin- modified scintillation proximity beads.
  • the ligand binding domains for murine and human PPAR ⁇ , PPAR ⁇ , and PPAR ⁇ were each fused to the yeast transcription factor GAL4 DNA binding domain.
  • CV-1 cells were transiently transfected with expression vectors for the respective PPAR chimera along with a reporter construct containing five copies of the GAL4 DNA binding site driving expression of secreted placental alkaline phosphatase (SPAP) and ⁇ -galactosidase. After 16 h, the medium was exchanged to DME medium supplemented with 10% delipidated fetal calf serum and the test compound at the appropriate concentration.
  • SFP placental alkaline phosphatase
  • the positive control in the hPPAR ⁇ and hPPAR ⁇ assays was 2-[4-(2-(3-(4-fluorophenyl)-1- heptylureido)ethyl)-phenoxy]-2-methylpropionic acid, which can be prepared as described in Brown, Peter J., et. al. Synthesis Issue 7, 778-782 (1997), or patent publication WO 9736579.
  • HDLc increased by more than 40% in each monkey at the 3 mg/kg dose.
  • NMR analysis of lipoprotein particle composition showed a shift in the LDLc composition to fewer and larger LDLc particles.
  • Serum TG concentrations decreased by more than 30% in each monkey.
  • Fasting insulin decreased by more than 20% in each monkey.
  • Serum fibrinogen concentrations decreased by 10-20%, with peak activity observed at doses of 0.3 and 1 mg/kg.

Abstract

Compounds of Formula (I) are disclosed. These compounds include selective activators of human PPAR delta.

Description

TΗIAZOLE AND OXAZOLE DERIVATIVES AND THEIR PHARMACEUTICAL USE
The present invention relates to certain novel compounds. In particular, the present invention relates to compounds that activate the delta subtype of the human peroxisome proliferator activated receptor ("hPPARδ"). The present invention also relates to method for preparing and using the novel compounds and to methods for using activators of hPPARδ.
Several independent risk factors have been associated with cardiovascular disease. These include hypertension, increased fibrinogen levels, high levels of triglycerides, elevated LDL cholesterol, elevated total cholesterol, and low levels of HDL cholesterol. HMG CoA reductase inhibitors ("statins") are useful for treating conditions characterized by high LDL-c levels. It has been shown that lowering LDL-c is not sufficient for reducing the risk of cardiovascular disease in some patients, particularly those with normal LDL-c levels. This population pool is identified by the independent risk factor of low
HDL-c. The increased risk of cardiovascular disease associated with low HDL-c levels has not yet been successfully addressed by drug therapy (i.e. currently there are no drugs on the market that are useful for raising HDL-c) . (Bisgaier, C. L.; Pape, M. E. Curr. Pharm. Des. 1998, 4, 53-70). Syndrome X (including metabolic syndrome) is loosely defined as a collection of abnormalities including hyperinsulinemia, obesity, elevated levels of trigycerides, uric acid, fibrinogen, small dense LDL particles, and plasminogen activator inhibitor 1 (PAI-1), and decreased levels of HDL-c.
NIDDM (non insulin dependent or Type 2 diabetes mellitus) is described as insulin resistance which in turn causes anomalous glucose output and a decrease in glucose uptake by skeletal muscle. These factors eventually lead to impaired glucose tolerance (IGT) and hyperinsulinemia.
Three mammalian Peroxisome Proliferator-Activated Receptors have been isolated and termed PPAR-alpha, PPAR-gamma, and PPAR-delta (also known as NUC1 or PPAR-beta). These PPARs regulate expression of target genes by binding to DNA sequence elements, termed PPAR response elements (PPRE). To date, PPRE's have been identified in the enhancers of a number of genes encoding proteins that regulate lipid metabolism suggesting that PPARs play a pivotal role in the adipogenic signaling cascade and lipid homeostasis (H. Keller and W. Wahli, Trends Endoodn. Met 291-296, 4 (1993)). It has now been reported that thiazolidinediones are potent and selective activators of PPAR-gamma and bind directly to the PPAR-gamma receptor (J.
M. Lehmann et. al., J. Biol. Chem. 12953-12956, 270 (1995)), providing evidence that PPAR-gamma is a possible target for the therapeutic actions of the thiazolidinediones.
Activators of the nuclear receptor PPARγ gamma, for example troglitazone, have been shown in the clinic to enhance insulin-action, reduce serum glucose and have small but significant effects on reducing serum triglyceride levels in patients with Type 2 diabetes. See, for example, D. E. Kelly et al., Curr. Opin. Endocrinol. Diabetes, 90-96, 5 (2), (1998); M. D. Johnson et al., Ann. Pharmacother., 337-348, 32 (3), (1997); and M. Leutenegger et al., Curr. Then Res., 403-416, 58 (7), (1997).
The mechanism for this triglyceride lowering effect appears to be predominantly increased clearance of very low density lipoproteins (VLDL) through induction of liporotein lipase (LPL) gene expression. See, for example,
B. Staels et al., Arterioscler. Thromb., Vase. Biol., 1756-1764, 17 (9), (1997).
Fibrates are a class of drugs which may lower serum triglycerides 20- 50%, lower LDLc 10-15%, shift the LDL particle size from the more atherogenic small dense to normal dense LDL, and increase HDLc 10-15%. Experimental evidence indicates that the effects of fibrates on serum lipids are mediated through activation of PPARα. See, for example, B. Staels et al., Curr. Pharm. Des., 1-14, 3 (1 ), (1997). Activation of PPAR alpha results in transcription of enzymes that increase fatty acid catabolism and decrease de-novo fatty acid synthesis in the liver resulting in decreased triglyceride synthesis and VLDL production/secretion. In addition, PPAR alpha activation decreases production of apoC-lll. Reduction in apoC-lll, an inhibitor of LPL activity, increases clearance of VLDL. See, for example, J. Auwerx et al., Atherosclerosis, (Shannon, Irel.), S29-S37, 124 (Suppl), (1996).
Certain compounds that activate or otherwise interact with one or more of the PPARs have been implicated in the regulation of triglyceride and cholesterol levels in animal models. See, for example, U.S. Patents 5,847,008 (Doebber et al.) and 5,859,051 (Adams et al.) and PCT publications WO 97/28149 (Leibowitz et al.) and WO99/04815 (Shimokawa et al.). In a recent report (Berger et al., J. Biol. Chem. 1999), vol. 274, pp. 6718-6725) it was stated that PPAR delta activation does not appear to modulate glucose or triglyceride levels. Briefly, in one aspect, the present invention provides compounds of formula (I), and pharmaceutically acceptable salts and, solvates thereof, wherein
Figure imgf000004_0001
X represents a COOH (or a hydrolysable ester thereof) or tetrazole group; X1 represents NH, NCH3, O, S, a bond (i.e. is absent), CH2, or CH where the dashed line indicates that when X1 is CH the depicted bond is a double bond;
X2 represents O or S;
R1 and R2 independently represent H, CH3, OCH3, or halogen; n is 1 or 2; one of Y and Z is N and the other is S or O: y is O, 1 , 2, 3, 4 or 5;
Each R3 independently represents CF3 or halogen.
In another aspect, the present invention discloses a method for prevention or treatment of a human PPAR delta ("hPPARδ") mediated disease or condition comprising administration of a therapeutically effective amount of a compound of this invention. hPPARδ mediated diseases or conditions include dyslipidemia including associated diabetic dyslipidemia and mixed dyslipidemia, syndrome X (as defined in this application this embraces metabolic syndrome), heart failure, hypercholesteremia, cardiovascular disease including atherosclerosis, arteriosclerosis, and hypertriglyceridemia, Type 2 diabetes mellitus, Type I diabetes, insulin resistance, hyperlipidemia, and regulation of appetite and food intake in subjects suffering from disorders such as obesity, anorexia bulimia, and anorexia nervosa. In particular, the compounds of this invention are useful in the treatment and prevention of cardiovascular diseases and conditions including atherosclerosis, arteriosclerosis, hypertriglyceridemia, and mixed dyslipidaemia.
In another aspect, the present invention provides pharmaceutical compositions comprising a compound of the invention, preferably in association with a pharmaceutically acceptable diluent or carrier. In another aspect, the present invention provides a compound of the invention for use in therapy, and in particular, in human medicine.
In another aspect, the present invention provides the use of a compound of the invention for the manufacture of a medicament for the treatment of a hPPARδ mediated disease or condition.
In another aspect, the present invention provides a method for lowering triglycerides by administration of a hPPARδ agonist. Preferably the hPPARδ agonist is a selective agonist.
In another aspect the present invention provides the use of a hPPARδ agonist for the manufacture of a medicament for lowering triglyceride levels.
Preferably the hPPARδ agonist is a selective agonist.
In a further aspect the present invention provides a method for treating Type 2 diabetes, decreasing insulin resistance or lowering blood pressure comprising administering a hPPARδ agonist. Preferably the hPPARδ agonist is a selective agonist.
In a further aspect there is provided the use of a hPPARδ agonist for the manufacture of a medicament for treating Type 2 diabetes, decreasing insulin resistance or lowering blood pressure. Preferably the hPPARδ agonist is a selective agonist. In a further aspect the invention provides a method for decreasing fibrinogen levels comprising administering a hPPARδ agonist. Preferably the hPPARδ agonist is a selective agonist.
In a further aspect there is provided the use of a hPPARδ agonist for the manufacture of a medicament for decreasing fibrinogen levels. Preferably the hPPARδ agonist is a selective agonist.
In a further aspect the invention provides a method for decreasing LDLc levels comprising administering a hPPARδ agonist. Preferably the hPPARδ agonist is a selective agonist.
In a further aspect the invention provides the use of a hPPARδ agonist for the manufacture of a medicament for decreasing LDLc levels. Preferably the hPPARδ agonist is a selective agonist.
In a further aspect the invention provides a method for shifting the LDL particle size from small dense to normal dense LDL comprising administering a hPPARδ agonist. Preferably the hPPARδ agonist is a selective agonist. In a further aspect the invention provides the use of a hPPARδ agonist for the manufacture of a medicament for shifting the LDL particle size from small dense to normal dense LDL. Preferably the hPPARδ agonist is a selective agonist. As used herein, "a compound of the invention" means a compound of formula (I) or a pharmaceutically acceptable salt or, solvate, thereof.
While hydrolyzable esters and tetrazole derivatives are included in the scope of this invention, the acids are preferred because the data suggests that while the esters are useful compounds, it may actually be the acids to which they hydrolyze that are the active compounds. Esters that hydrolyze readily can produce the carboxylic acid in the assay conditions or in vivo. Generally the carboxylic acid is active in both the binding and transient transfection assays, while the ester does not usually bind well but is active in the transient transfection assay presumably due to hydrolysis. Preferred hydrolysable esters are C^ alkyl esters wherein the alkyl group may be straight chain or branched chain. Methyl or ethyl esters are more preferred.
Preferably therefore X represents COOH;
Preferably X1 is O, S, or is absent. More preferably X1 represents O.
Preferably X2 is S. Preferably R1 is H or CH3, more preferably CH3.
Preferably R2 is H.
Preferably Z is N.
Preferably Y is S.
Preferably n is 1. Preferably y is 1 or 2. When y is 2, preferably one of the substituents is halogen; more preferably one is halogen and the other is CF3. More preferably y is 1. When y is 1 , preferably the substituent is in the para position on the ring and is more preferably CF3.
A particular group of compounds is compounds of formula (II), and pharmaceutically acceptable salts, solvates, and hydrolyzable esters thereof, wherein
Figure imgf000007_0001
X1 is NH, NCH3, O, S, a bond (i.e. is absent), CH2, or CH where the dashed line indicates that when X1 is CH the depicted bond is a double bond; X2 is O or S;
R1 is H, CH3, OCH3, or halogen; R2 is H, OCH3, or halogen n is 1 or 2; one of Y and Z is N and the other is S or O. R3 is H, CF3 or halogen.
While the preferred groups for each variable have generally been listed above separately for each variable, preferred compounds of this invention include those in which several or each variable in Formula (I) is selected from the preferred, more preferred, or most preferred groups for each variable.
Therefore, this invention is intended to include all combinations of preferred, more preferred, and most preferred groups.
Preferably, the compounds of formula (I) are hPPARδ agonists. As used herein, by "agonist", or "activating compound", or "activator", or the like, is meant those compounds which have a pKi of at least 6.0, preferably at least 7.0, to the relevant PPAR, for example hPPARδ, in the binding assay described below, and which achieve at least 50% activation of the relevant PPAR relative to the appropriate indicated positive control in the transfection assay described below at concentrations of 10'5 M or less. Preferably, the agonist of this invention achieve 50% activation of human PPARδ in the transfection assay at concentrations of 10"7 M or less, more preferably 10"9M or less.
Most preferably, the compounds of formula (I) are selective hPPARδ agonists. As used herein, a "selective hPPARδ agonist" is a hPPARδ agonist whose EC50 for PPARδ is at least 10 fold lower than its EC50 for PPARγ and PPARα. Such selective compounds may be referred to as "10-fold selective."
EC50 is defined in the transfection assay described below and is the concentration at which a compound achieves 50% of its maximum activity. Most preferred compounds are greater than 100-fold selective hPPARδ agonists.
The PPARδ selective compounds of this invention elevate HDL-c in db/db mice and primate models and lower fibrinogen in primate models. These PPARδ selective agonists unexpectedly lower triglycerides and insulin levels in the primate.
Since the literature suggests that such triglyceride and fibrinogen lowering effects are due to PPAR alpha agonist activity, it would not be obvious that adding PPAR delta agonist activity to other PPAR activity such as alpha or gamma or alpha/gamma dual activity, would provide any additional triglyceride or fibrinogen lowering benefits. We have surprisingly found that adding PPAR delta activity to other PPAR activity, including PPAR alpha activity, could result in additional triglyceride, LDLc or fibrinogen lowering benefits as well as decreasing insulin resistance.
Preferred compounds of the present invention include:
2-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenoxy]acetic acid
3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]propanoic acid
3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenyl]propanoic acid
2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)sulfanyl]phenyl}acetic acid 2-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenoxy]acetic acid
3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyi]-1 ,3-thiazol-5- yl}methoxy)phenyl]propanoic acid
(E)-3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenyl]-2-propenoic acid methyl 3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]propanoate
2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1
Figure imgf000008_0001
yl}methyl)sulfanyl]phenyl}acetic acid 2-({4-[({4-methyl-2-[4-(trifiuoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)sulfanyl]phenyl}sulfanyl)acetic acid
2-[methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)anilino]acetic acid 2-{3-chloro-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)sulfanyl]phenyl}acetic acid
2-[2-chloro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenoxy]acetic acid
2-[3-chloro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]acetic acid
2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
(E)-3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5-yl}methoxy)phenyl]-
2-propenoic acid 2-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenoxy]acetic acid
2-[3-fluoro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]acetic acid methyl 2-[3-chloro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenyl]acetate
2-{2-methyl-4-[({4-methyl-2-[4-bromophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[4-bromophenyl]-1 ,3-thiazol-5-yl}methyl) sulfanyl]phenoxy}acetate 2-{2-methyl-4-[({4-methyl-2-[4-chlorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[4-chlorophenyl]-1 ,3-thiazol-5-yl}methyl) sulfanyl]phenoxy}acetate
2-{2-methyl-4-[({4-methyl-2-[4-fluorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[4-fluorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
2-{2-methyl-4-[({4-methyl-2-[3,4-difluorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[3,4-difluorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
2-{2-methyl-4-[({4-methyl-2-[3,4-dichlorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl2-{2-methyl-4-[({4-methyl-2-[3,4-dichlorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
2-{2-methyl-4-[({4-methyl-2-[3,5-bis(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[3,5-bis(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate ethyl 2-{2-methyl-4-[({4-methyl-2-[3-fluoro-4-(trifluoromethyl)phenyl]-1 ,3-thiazol-
5-yl}methyl)sulfanyl]phenoxy}acetate
5-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenoxymethyl]-2H-tetrazole 5-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5-yl}methoxy)benzyl]-2H- tetrazole
5-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5-yl}sulfanyl)benzyl]-2H- tetrazole
5-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5-yl}sulfanyl)benzyl]-2H- tetrazole
5-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)benzyl]-2H-tetrazole
5-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}sulfanyl)benzyl]-2H-tetrazole
More preferred compounds of the invention are:
2-{2-methyl^4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
2-{2-methyl-4-[({4-methyl-2-[4-(trifiuoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid methyl 2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate 2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
(E)-3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]-2-propenoic acid 2-{3-chloro-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenyl}acetic acid
2-{2-methyl-4-[({4-methyl-2-[3-fluoro-4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
A particularly preferred compound of the invention is:
2-{2-methyl-4[({4-methyl-2[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid.
All the preferred and most preferred compounds listed above are selective hPPARδ agonists.
It will also be appreciated by those skilled in the art that the compounds of the present invention may also be utilized in the form of a pharmaceutically acceptable salt or solvate thereof. The physiologically acceptable salts of the compounds of formula (I) include conventional salts formed from pharmaceutically acceptable inorganic or organic acids or bases as well as quaternary ammonium acid addition salts. More specific examples of suitable acid salts include hydrochloric, hydrobromic, sulfuric, phosphoric, nitric, perchloric, fumaric, acetic, propionic, succinic, glycolic, formic, lactic, maleic, tartaric, citric, palmoic, malonic, hydroxymaleic, phenylacetic, glutamic, benzoic, salicylic, fumaric, toluenesulfonic, methanesulfonic, naphthalene-2-sulfonic, benzenesulfonic hydroxynaphthoic, hydroiodic, malic, steroic, tannic and the like. Other acids such as oxalic, while not in themselves pharmaceutically acceptable, may be useful in the preparation of salts useful as intermediates in obtaining the compounds of the invention and their pharmaceutically acceptable salts. More specific examples of suitable basic salts include sodium, lithium, potassium, magnesium, aluminium, calcium, zinc, N.N'-dibenzylethylenediamine, chloroprocaine, choline, diethanolamine, ethylenediamine, N-methylglucamine and procaine salts. Those skilled in the art of organic chemistry will appreciate that many organic compounds can form complexes with solvents in which they are reacted or from which they are precipitated or crystallized. These complexes are known as "solvates". For example, a complex with water is known as a "hydrate". Solvates of the compound of formula (I) are within the scope of the invention. References hereinafter to a compound according to the invention include both compounds of formula (I) and their pharmaceutically acceptable salts and solvates.
It will be appreciated by those skilled in the art that reference herein to treatment extends to prophylaxis as well as the treatment of established diseases or symptoms. Moreover, it will be appreciated that the amount of a compound of the invention required for use in treatment will vary with the nature of the condition being treated and the age and the condition of the patient and will be ultimately at the discretion of the attendant physician or veterinarian. In general, however, doses employed for adult human treatment will typically be in the range of 0.02-5000 mg per day, preferably 1-1500 mg per day. The desired dose may conveniently be presented in a single dose or as divided doses administered at appropriate intervals, for example as two, three, four or more sub-doses per day.
While it is possible that compounds of the present invention may be therapeutically administered as the raw chemical, it is preferable to present the active ingredient as a pharmaceutical formulation. Accordingly, the present invention further provides for a pharmaceutical formulation comprising a compound of formula (I) or a pharmaceutically acceptable salt or solvate thereof together with one or more pharmaceutically acceptable carriers therefor and, optionally, other therapeutic and/or prophylactic ingredients. Formulations of the present invention include those especially formulated for oral, buccal, parenteral, transdermal, inhalation, intranasal, traπsmucosal, implant, or rectal administration, however, oral administration is preferred. For buccal administration, the formulation may take the form of tablets or lozenges formulated in conventional manner. Tablets and capsules for oral administration may contain conventional excipients such as binding agents, (for example, syrup, acacia, gelatin, sorbitol, tragacanth, mucilage of starch or polyvinylpyrrolidone), fillers (for example, lactose, sugar, microcrystalline cellulose, maize-starch, calcium phosphate or sorbitol), lubricants (for example, magnesium stearate, stearic acid, talc, polyethylene glycol or silica), disintegrants (for example, potato starch or sodium starch glycollate) or wetting agents, such as sodium lauryl sulfate. The tablets may be coated according to methods well-known in the art.
Alternatively, the compounds of the present invention may be incorporated into oral liquid preparations such as aqueous or oily suspensions, solutions, emulsions, syrups or elixirs, for example. Moreover, formulations containing these compounds may be presented as a dry product for constitution with water or other suitable vehicle before use. Such liquid preparations may contain conventional additives such as suspending agents such as sorbitol syrup, methyl cellulose, glucose/sugar syrup, gelatin, hydroxyethylcellulose, carboxymethyl cellulose, aluminum stearate gel or hydrogenated edible fats; emulsifying agents such as lecithin, sorbitan mono-oleate or acacia; non- aqueous vehicles (which may include edible oils) such as almond oil, fractionated coconut oil, oily esters, propylene glycol or ethyl alcohol; and preservatives such as methyl or propyl p-hydroxybenzoates or sorbic acid. Such preparations may also be formulated as suppositories, e.g., containing conventional suppository bases such as cocoa butter or other glycerides.
Additionally, formulations of the present invention may be formulated for parenteral administration by injection or continuous infusion. Formulations for injection may take such forms as suspensions, solutions, or emulsions in oily or aqueous vehicles, and may contain formulatory agents such as suspending, stabilizing and/or dispersing agents. Alternatively, the active ingredient may be in powder form for constitution with a suitable vehicle (e.g., sterile, pyrogen-free water) before use.
The formulations according to the invention may also be formulated as a depot preparation. Such long acting formulations may be administered by implantation (for example, subcutaneously or intramuscularly) or by intramuscular injection. Accordingly, the compounds of the invention may be formulated with suitable polymeric or hydrophobic materials (as an emulsion in an acceptable oil, for example), ion exchange resins or as sparingly soluble derivatives as a sparingly soluble salt, for example.
The formulations according to the invention may contain between 0.1- 99% of the active ingredient, conveniently from 30-95% for tablets and capsules and 3-50% for liquid preparations.
The compound of formula (I) for use in the instant invention may be used in combination with other therapeutic agents for example, statins and/or other lipid lowering drugs for example MTP inhibitors and LDLR upregulators. The compounds of the invention may also be used in combination with antidiabetic agents, e.g. metformin, sulfonylureas, or PPAR gamma, PPAR alpha and PPAR alpha/gamma agonists (for example thiazolidinediones such as e.g. Pioglitazone and Rosiglitazone). The compounds may also be used in combination with antihypertensive agents such as angiotensin antagonists eg telmisartan, calcium channel antagonists eg lacidipine and ACE inhibitors eg enalapril . The invention thus provides in a further aspect the use of a combination comprising a compound of formula (I) with a further therapeutic agent in the treatment of a hPPAR delta mediated disease.
When the compounds of formula (I) are used in combination with other therapeutic agents, the compounds may be administered either sequentially or simultaneously by any convenient route.
The combinations referred to above may conveniently be presented for use in the form of a pharmaceutical formulation and thus pharmaceutical formulations comprising a combination as defined above optimally together with a pharmaceutically acceptable carrier or excipient comprise a further aspect of the invention. The individual components of such combinations may be administered either sequentially or simultaneously in separate or combined pharmaceutical formulations.
When combined in the same formulation it will be appreciated that the two compounds must be stable and compatible with each other and the other components of the formulation and may be formulated for administration. When formulated separately they may be provided in any convenient formulation, conveniently in such a manner as are known for such compounds in the art.
When a compound of formula (I) is used in combination with a second therapeutic agent active against the same disease, the dose of each compound may differ from that when the compound is used alone. Appropriate doses will be readily appreciated by those skilled in the art. Compounds of this invention may be conveniently prepared by a general process wherein a moiety like A is coupled to an alcohol (B) using the Mitsunobu protocol (O. Mitsunobu, 1981 Synthesis, p 1 ) or by alkylation of A using a suitable non nucleophilic base such as K2CO3, Cs2CO3 or NaH, with an alkyl halide (C). Note that this synthesis is preferably carried out with the acid group protected by R. Preferably, R is 1-6 alkyl which can be hydrolyzed off to give an acid of Formula (I), or if readily hydrolyzable, the resulting ester can be administered.
Figure imgf000015_0001
For example, when n is1 , Y is S, Z is N, and R3 is para-CF3
Figure imgf000015_0002
Figure imgf000015_0003
Some of the intermediates of type A are commercially available while others can be synthesized as outlined below. The synthesis of intermediates of type B is also illustrated below.
Furthermore, the tetrazole derivatives may be conveniently prepared by a general process wherein a moiety like D is coupled to an alcohol (B) using the Mitsunobu protocol (O. Mitsunobu, 1981 Synthesis, p 1 ), by alkylation of D using a suitable non nucleophilic base such as K2CO3, Cs2CO3 or NaH, with an alkyl halide (C) or by coupling of a moiety like E with an alkyl halide (C) using a suitable non nucleophilic base such as NaOH.
Figure imgf000016_0001
For example, when n is1 , Y is S, Z is N, and R3 is para-CF3
Figure imgf000016_0002
Figure imgf000016_0003
Figure imgf000016_0004
reflux
Figure imgf000016_0005
Figure imgf000016_0006
The invention is further illustrated by the following Intermediates and Examples which should not be construed as constituting a limitation thereto. INTERMEDIATES
Intermediate 1
Figure imgf000017_0001
To a well stirred solution of LiAIH4 (1.52 g, 40 mmol) in dry THF (50 mL) at 0 °C, was slowly added a solution of ethyl 4-methyl-2-[4- (trifluoromethyl)phenyl]-thiazole-5-carboxylate (12.6 g, 40 mmol) in dry THF (50 mL). The mixture was stirred at room temperature for 2 hs. The reaction was quenched by slow addition at 0 °C of water (2 mL), 5N NaOH (2 mL) and water (6 mL). The precipitate was filtered, washed with EtOAc, MeOH, CH2CI2 and THF. After evaporation, a yellow solid was obtained, that was crystallyzed from MeOH-water to afford intermediate 1 depicted above (9.90 g, 36 mmol, 90%) as a yellow solid mp 120-122 °C.
Intermediate
Figure imgf000017_0002
To a cold (0°C) stirred solution of intermediate 1 (8.2g, 30 mmol) and Et3N (6.07 g, 8.36 mL, 60 mmol), in dry CH2CI2 (120 mL) was slowly added MeS02CI (5.49 g, 3.71 mL, 48 mmol). After 2 hs at 0°C more Et3N (6 mmol) and MeS02CI (4.8 mmol) were added. After 2 more h a tic (hexane:EtOAc, 1 :1 ) showed complete reaction. The reaction mixture was diluted with CH2CI2 (120 mL) and washed with NaHCO3 (sat.) (2 x 240 mL) and water (2 x 240 mL), dried, filtered and evaporated to afford intermediate 2 (8.0 g, 27 mmol, 90%) as a yellow solid.
Intermediate
Figure imgf000017_0003
A neat mixture of methyl 2-chloroacetoacetate (9.88 g, 8.0 mL, 65.6 mmol) and 4-(trifluoromethyl)benzamide acid (5.67 g, 30 mmol), was heated in an oil bath at 120 °C for 48 h. The dark mixture was cooled down to room temperature and diluted with EtOAc (100 mL) and succesively washed with : NaHCO3 (sat.) (3 x 100 mL) and water (3 x 100 mL), dried, filtered and evaporated to a syrup. The syrup was dissolved in acetone and precipitated with hexane. The solids (unreacted 4-(trifluoromethyl)benzamide acid were filtered and washed with more hexane. The solution was evaporated under vacuum at 60 °C to eliminate traces of methyl 2-chloroacetoacetate. The resulting mixture was purified by flash column chromatography (hexane: EtOAc, 95:5), to afford intermediate 3 (2.2 g, 7.7 mmol, 25%) as a white solid.
Intermediate
Figure imgf000018_0001
To a well stirred solution of LiAIH4 (213 mg, 5.6 mmol) in dry THF (7.0 mL) at 0°C, was slowly added a solution of intermediate 3 (1.6 g, 5.6 mmol) in dry THF (7.0 mL). The mixture was stirred at room temperature for 2 h. The reaction was quenched by slow addition at 0°C of water (0.3 mL), 5N NaOH (0.3 mL) and water (0.9 mL). The precipitate was filtered, washed with EtOAc, MeOH, CH2CI2 and THF. After evaporation, intermediate 4 (1.1 g, 4.3 mmol, 77%) was obtained as a yellow solid.
Intermediate
Figure imgf000018_0002
To a cold (0° stirred of intermediate 4 (2.57 g, 10 mmol) and Et3N (2.02 g, 2.78 mL, 20 mmol), in dry CH2CI2 (40 mL) was slowly added MeSO2CI (1.83 g, 1.24 mL, 16 mmol). After 2 h at 0°C more Et3N (4 mmol) and MeSO2CI (3.2 mmol) were added. After 2 more h a tic (hexane:EtOAc, 1 :1), showed complete reaction. The reaction mixture was diluted with CH2CI2 (40 mL) and washed with NaHCO3 (sat.) (2 x 80 mL) and water (2 x 80 mL), dried, filtered and evaporated to afford intermediate 5 (2.8 g, 10 mmol, 100%) as a yellow solid.
Intermediate 6
Figure imgf000018_0003
A solution of 3-(trifluoromethyl)benzoic acid (570 mg, 3.0 mmol) in dry
DMF (10 mL) was heated at 55°C. Solid K2CO3 (220 mg, 1.53 mmol) was added, followed by methyl 2-chloroacetoacetate (452 mg, 3.0 mmol). The suspension was stirred for 1.5 h at 55°C. The reaction was then partitioned between water (40 mL) and ether (50 mL). The organic layer was further washed with brine (2 x 40 mL), dried, filtered and evaporated to a yellow oil. A solution of this oil in AcOH (10 mL), was added to a suspension of NH4OAc (0.64 g, 8.3 mmol) in dry toluene (10 mL). The reaction was then refluxed overnight. It was poured into ice/water (60 mL) and extracted with ether (4 x 30 mL). The organic layer was washed with brine (2 x 60 mL), dried, filtered and evaporated to give crude material that was purified by flash column chromatography (CH2CI2) to afford intermediate 6 (320 mg, 1.12 mmol,, 37 %) as a white solid .
Intermediate 7
Figure imgf000019_0001
To a well stirred solution of LiAIH4 (38 mg, 1.0 mmol) in dry THF (1.5 mL) at 0°C, was slowly added a solution of intermediate 6 (285 mg, 1.0 mmol) in dry THF (1.5 mL). The mixture was stirred at room temperature for 2 h. The reaction was quenched by slow addition at 0°C of water (100 μL), 5N NaOH
(100 μL) and water (300 μL). The precipitate was filtered, washed with EtOAc, MeOH, CH2CI2 and THF to afford intermediate 7 (210 mg, 0.82 mmol, 82 %) as a white solid.
Intermediate
Figure imgf000019_0002
A solution of benzoic acid (1.22 g, 10.0 mmol) in dry DMF (20 mL) was heated at 55°C. Solid K2CO3 (691 mg, 5.0 mmol) was added, followed by methyl 2-chloroacetoacetate (1.50 g, 10.0 mmol). The suspension was stirred for 1.5 h at 55°C The reaction was then partitioned between water (150 mL) and ether (150 mL). The organic layer was further washed with brine (2 x 150 mL), dried, filtered and evaporated to a yellow oil. A solution of this oil in AcOH (20 mL), was added to a suspension of NH4OAc (2.13 g, 28 mmol) in dry toluene (20 mL). The reaction was then refluxed overnight. It was poured into ice/water (200 mL) and extracted with ether (4 x 100 mL). The organic layer was washed with brine (2 x 200 mL), dried, filtered and evaporated to give crude material that was purified by flash column chromatography (hexane:EtOAc, 4:1 ) to afford intermediate 8 (720mg, 3.13 mmol, 32 %) as a white solid .
Intermediate
Figure imgf000020_0001
To a well stirred solution of LiAIH4 (76 mg, 2.0 mmol) in dry THF (2.5 mL) at 0 °C, was slowly added a solution of intermediate 8 (434 mg, 2.0 mmol) in dry THF (2.5 mL). The mixture was stirred at room temperature for 2 h. The reaction was quenched by slow addition at 0°C of water (100 μL), 5N NaOH (100 μL) and water (300 μL). The precipitate was filtered, washed with EtOAc, MeOH, CH2CI2 and THF to afford intermediate 9 (349 mg, 0.92 mmol, 46 %).
Which was used without further purification.
Intermediate
Figure imgf000020_0002
A solution of ethyl-3-bromo-4-oxopentanoate (670 mg, 3.0 mmol) and 4- (trifluoromethyl)thiobenzamide (677 mg, 3.3 mmol) in EtOH (5 mL) was refluxed overnight. After cooling to room temperature the solution was diluted with
AcOEt. After adding hexane a precipitate appeared. It was filtered and washed with hexane to afford intermediate 10 (300 mg, 0.91 mmol) as a white solid. The mother liquors were evaporated to a syrup that was purified by flash column chromatography (hexane:EtOAc, 9:1 ) to afford additional intermediate 10 (300 mg, 0.91 mmol). Total yield was 60 %.
Intermediate 11
Figure imgf000020_0003
To a well stirred solution of LiAIH4 (31 mg, 0.8 mmol) in dry THF (1.0 mL) at 0°C, was slowly added a solution of intermediate 10 (264 mg, 0.8 mmol) in dry THF (1.5 mL) and dry CH2CI2 (1.5 mL). The mixture was stirred at room temperature for 2 h. The reaction was quenched by slow addition at 0°C of water (50.0 μL), 5N NaOH (50.0 μL) and water (150 μL). The precipitate was filtered, washed with EtOAc, MeOH, CH2CI2 and THF. After evaporation intermediate 11 (133 mg, 0.46 mmol, 57 %) was obtained as a yellow solid.
Intermediate 12
Figure imgf000021_0001
A solution of methyl-4-bromo-3-oxopentanoate (890 mg, 4.0 mmol) and and 4-(trifluoromethyl)thiobenzamide (820 mg, 4.0 mmol) in EtOH (10 mL) was refluxed overnight. After cooling to room temperature the solution was diluted with AcOEt and successively washed with (sat.) NaHCO3 (3 x 50 mL) and brine
(2 x 50 mL), dried, filtered, and evaporated to dryness. A yellow solid was obtained, that was purified by flash column chromatography (hexane:EtOAc, 1 :1 ) to afford the title compound (1.32 g, 4.0 mmol, 100 %) as a white solid.
Intermediate 13
Figure imgf000021_0002
To a well stirred solution of LiAIH4 (76 mg, 2.0 mmol) in dry THF (2.5 mL) at 0°C, was slowly added a solution of Intermediate 12 (659 mg, 2.0 mmol) in dry THF (2.5 mL). The mixture was stirred at room temperature for 2 h. The reaction was quenched by slow addition at 0°C of water (100 μL), 5N NaOH (100 μL) and water (300 μL). The precipitate was filtered, washed with EtOAc, MeOH, CH2CI2 and THF. After evaporation compound the title compound was obtained as a yellow solid (472 mg, 1.64 mmol, 82 %).
Intermediate 14
Figure imgf000021_0003
Methyl acrylate and 4-bromo-3-methylphenol were coupled using Heck conditions as described in the general procedure 4. The crude material was crystallized from acetone:hexane to afford the title compound (40 %) as an amorphous solid.
Figure imgf000022_0001
A solution of intermediate 14 (1.92 g, 10 mmol) in EtOAc (50 mL) was hydrogenated at 50-60 psi at room temperature, in the presence of Pd/C 10% (500 mg). After 15 min., the mixture was filtered through celite, washed with additional EtOAc and evaporated to afford the title compound (1.94 g, 10 mmol, 100 %) as a colorless syrup.
Figure imgf000022_0002
N-Methylanisidine (2.0 g, 15 mmol),methyl bromoacetate (2.25 g, 15 mmol), DMAP (0.04 g, 2% by wt), and Net3 (2.25 g, 15 mmol) in EtOH (50 mL) was refluxed for 1 h. The solvents were evaporated. The remaining residue was chromatographied on a silica gel column with 10% EtOAc in hexanes to afford the title compound (70%) as a yellow oil: NMR (DMSO-d6) δ2.97 (s, 3H), 3.66(s,
3H), 3.72 (s,3H), 4.18 (s,2H), 6.68(d, 2H), 6.85(d, 2H) MS m/z 210 (M+1 )-
Intermediate 17
Figure imgf000022_0003
Intermediate 16 (1.9 g, 9.0 mmol) in CH2CI2 (10 mL) was added to 1 M BBr3 in CH2CI2 (28 mL) slowly at 0 °C. The resulting solution was stirred at low temperature for 2 h, and poured onto ice-water. The mixture was extracted with CH2CI2 (2x50 mL), dried, and evaporated. A solution of this residue and acetyl chloride(1.4 g, 18 mmol) in MeOH was refluxed for 18h. The solvents were evaporated. The residue was chromatographed over silica gel to afford the title compound (45%)as a yellow oil: NMR (MeOH-d4) δ3.39 (s, 3H), 3.72(s, 3H),
4.51 (s,2H),6.87(d, 2H), 7.48 (d, 2H) MS m/z 196(M+1 )-
Intermediate 18
Figure imgf000023_0001
Methyl 3-Chloro-4-hydroxyphenylacetate was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford, after column chromatography (hexane:EtOAc, 4:1 ), a brown oil (95 %). The residue was refluxed in tetradecane as to afford after column chromatography (hexane: EtOAc, 4:1 ) the title compound (77 %) as a yellow oil.
Intermediate 19
Figure imgf000023_0002
Methyl 2-(4-hydroxyphenoxy)acetate was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford, after column chromatography (hexane: EtOAc, 4:1 ), (84 %) as a yellow oil. The oil was refluxed in tetradecane as to afford after column chromatography (hexane:EtOAc, 4:1 ) the title compound (53 %) as a yellow oil.
Intermediate 20
Figure imgf000023_0003
A mixture of methyl bromoacetate (3.80 g, 2.35 mL, 25.0 mmol), 4- hydroxy-3-methylacetophenone (4.13 g, 27.5 mmol), and Cs2CO3 (17.9 g, 55 mmol) in dry acetonitrile (125 mL) was stirred overnight at r.t. The mixture was filtered, washed with acetonitrile, and the solvent evaporated. The remaining syrup was redissolved in EtOAc (400mL), washed with 1 N NaOH (3 x 400 mL) and water (2 x 400 mL), dried, filtered, and evaporated to afford the pure title compound (5.50 g, 24.7 mmol, 99%) as a white solid. Intermediate 21
Figure imgf000024_0001
A solution of Intermediate 20 (5.33 g, 24 mmol), mCPBA (7.25 g, 42 mmol) and p-TsOH (480 mg) in dry dichloromethane (120 mL) was refluxed for 48 h. The reaction mixture was diluted with dichloromethane (120 mL), and successively washed with: aq. Kl (2 x 200 mL), NaHSO3 (2 x 200 mL), dried, filtered and evaporated to afford the title compound (5.0 g, 21 mmol, 87%) as a syrup.
Intermediate
Figure imgf000024_0002
A solution of intermediate 21 (4.76 g, 20 mmol) in dry methanol (180 mL) was treated with a 0.5 N solution of NaOCH3 in MeOH (40 mL, 20 mmol). After
1 h at r.t., the solution was neutralized with 1 N HCI (20 mL). The solvent was evaporated, and the residue partitioned between dichloromethane (300 mL) and water (300 mL). The organic solution was separated, washed with water (300 mL), dried, filtered, and evaporated to afford the title compound (3.3 g, 16.8 mmol, 84%) as a brown solid.
Figure imgf000024_0003
Methyl 4-hydroxyphenylacetate was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford, after column chromatography (hexane:EtOAc, 4:1 ) (90 %) a yellow solid. The solid was refluxed in tetradecane to afford after column chromatography (hexane:EtOAc,
4:1 ) the title compound (74 %) as a brown oil. Intermediate 24
Figure imgf000025_0001
Methyl 3-methoxy-4-hydroxyphenylacetate was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford, after column chromatography (hexane:EtOAc, 4:1 ), a brown oil (95 %). The oil was refluxed in tetradecane to afford after column chromatography (hexane:EtOAc, 4:1 ) compound the title compound (17 %) as a yellow oil.
Intermediate
Figure imgf000025_0002
Intermediate 22 was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford a dark oil (100 %). The dark oil was refluxed in tetradecane to afford after column chromatography (hexane: EtOAc, 2:1 ) compound a brown solid (47%). The brown solid was treated with NaOMe/HOMe to afford, after column chromatography (hexane: EtOAc, 4:1 ), compound the title compound (34%) as a colorless syrup.
General proced ure A for the preparation of substituted thiobenzamides
To a solution of P S-|0 (0 .2 mmol) in toluene (100 mL) was added
NaHCO3 (2 mmol) and the mixture heated to reflux for ca. 30min. The substituted benzamide (1 mmol) was added and the reaction stirred at 90°C for
1 h. The reaction was then evaporated to dryness, treated with brine (100 mL) and extracted with CH2CI2 (2 X 50 mL). The organic phase dried, filtered, and evaporated to afford the final product.
Intermediate 26
Figure imgf000025_0003
The title compound was prepared as described in general procedure A to afford an orange solid (88%). MSm/z217(M+1)
Intermediate
Figure imgf000026_0001
The title compound was prepared as described in general procedure A to afford an orange solid (99%). MSm/z171
Intermediate
Figure imgf000026_0002
The title compound was prepared as described in general procedure A to afford an orange solid (58%).
MSm/z155
Intermediate
Figure imgf000026_0003
The title compound was prepared as described in general proceedure A to afford a yellow solid (87%).
MSm/z207(M+1)
Intermediate
Figure imgf000026_0004
The title compound was prepared as described in general procedure A to afford a brownish orange solid (78%).
MSm/z173 Intermediate 31
Figure imgf000027_0001
The title compound was prepared as described in general procedure A to afford a yellow semi-solid (55%). MS m/z 273
Intermediate
Figure imgf000027_0002
The title compound was prepared as described in general procedure A to afford a yellow solid (50%). MS m/z 223
General procedure B for the preparation of 2-substituted phenyl-4- methyl-1,3-thiazole-5-caboxylic acid ethyl esters
To a solution of the substituted thiobenzamide (1 mmol) in EtOH (100 mL) was added ethyl 2-chloroacetoacetate (1.1 mmol) and the mixture heated to reflux overnight. The reaction is cooled to room temperature and the solvent evaporated. The solid is crystallized from Et2O or hexane to afford the final product.
Intermediate 33
Figure imgf000027_0003
Intermediate 26 was reacted as described in general procedure B to afford the title compound as an off-white solid (41 %). MS m/z 327 (M+1 )
Intermediate 34
Figure imgf000027_0004
Intermediate 27 was reacted as described in general procedure B to afford the title compound as an off-white solid (29%). MS m/z 281
Intermediate 35
Figure imgf000028_0001
Intermediate 28 was reacted as -described in general procedure B to afford the title compound as an off-white solid (25%).
1 H-NMR (CDCI3) 51.35 (t, 3H), 2.75 (s, 3H), 4.35 (q, 2H), 7.15 (t, 2H), 7.95 (dd, 2H).
Figure imgf000028_0002
Intermediate 29 was reacted as described in general procedure B to afford the title compound as an off-white solid (46%). MS m/z 315
Intermediate 37
Figure imgf000028_0003
Intermediate 30 was reacted as described in general procedure B to afford the title compound as an off-white solid (41%).
1 H-NMR (CDCI3) δ1.35 (t, 3H), 2.75 (s, 3H), 4.35 (q, 2H), 7.25 (dd, 1 H), 7.65 (m, 1 H), 7.75 (ddd, 1 H).
Intermediate 38
Figure imgf000028_0004
Intermediate 31 was reacted as described in general procedure B to afford the title compound as an off-white solid (58%). MS m/z 383 Intermediate 39
Figure imgf000029_0001
Intermediate 32 was reacted as described in general procedure B to afford the title compound as an off-white solid (56%). MS m/z 333
General procedure C for the preparation of 2-substituted phenyl-5- hydroxymethyl-4-methyl-1,3-thiazoles
To a solution of LiAIH4 (2 mmol) in THF (100 mL) at 0°C was added the 2- substituted phenyl-4-methyl-1 ,3-thiazole-5-caboxylic acid ethyl ester. The reaction is stirred while it is allowed to warm to rt. After all the starting material has disappeared, the reaction is cautiously treated with water (5 mL) followed by 1 N NaOH (10 mL). The mixture was filtered through celite. The filtrate was extracted with CH2CI2 (3 x 50 mL). The organic phase was dried, filtered and evaporated to afford the final product.
Intermediate 40 H0"XK Br
Intermediate 33 was reacted as described in general procedure C to afford the title compound as an off-white solid (75%). MS m/z 285 (M+1 )
Intermediate 41 H°0cK cι
Intermediate 34 was reacted as described in general procedure C to afford the title compound as an off-white solid (87%). MS m/z 239
Intermediate 42 " X
Intermediate 35 was reacted as described in general procedure C to afford the title compound as an off-white solid (89%). 1 H-NMR (CDCI3) 51.7 (bs, 1 H), 2.35 (s, 3H), 4.75 (s, 2H), 7.05 (t, 2H), 7.80 (dd, 2H).
Intermediate
Figure imgf000030_0001
Intermediate 36 was reacted as described in general procedure C to afford the title compound as an off-white solid (56%). MS m/z 275 (M+1 )
Figure imgf000030_0002
Intermediate 37 was reacted as described in general procedure C to afford the title compound as an off-white solid (52%). MS m/z 241
Figure imgf000030_0003
Intermediate 38 was reacted as described in general procedure C to afford the title compound as an off-white solid (27%). MS m/z 341
Intermediate 46
Figure imgf000030_0004
Intermediate 39 was reacted as described in general procedure C to afford the title compound as an off-white solid (63%). MS m/z 291
General procedure D for the preparation of 2-substituted phenyl-5- chloromethyl-4-methyl-1,3-thiazoles To a solution of the 2-substituted phenyl-5-hydroxymethyl-4-methyl-1 ,3- thiazole (1 mmol) and Et3N (2 mmol) in CH2CI2 (100 mL) at 0°C was added dropwise methanesulfonyl chloride (1.6 mmol). After 2-4h the reaction was complete. CH2CI2 (50 mL) is added and the organic phase washed with a saturated. NaHCO3 solution (2 x 50 mL), water (2 x 50 mL), dried, filtered and then evaporated to afford the final product.
Intermediate 47 cl0cH Br
Intermediate 40 was reacted as described in general procedure D to afford the title compound as an white solid (40%).
MS m/z 303
Figure imgf000031_0001
Intermediate 41 was reacted as described in general procedure D to afford the title compound as an white solid (80%).
MS m/z 259 (M+1)
Intermediate
Figure imgf000031_0002
Intermediate was cted as described in general procedure D to afford the title compound as a pale yellow solid (100%). MS m/z 241
Intermediate
Figure imgf000031_0003
Intermediate 43 was reacted as described in general procedure D to afford the title compound as a pale yellow solid (74%).
1 H-NMR (CDCI3) δ2.40 (s, 3H), 4.70 (s, 2H), 7.40 (dd, 1 H), 7.60 (dd, 1 H), 7.90 (d, 1 H). Intermediate 51
Figure imgf000032_0001
Intermediate 44 was reacted as described in general procedure D to afford the title compound as a pale yellow solid (83%).
1 H-NMR (CDCI3) δ2.30 (s, 3H), 4.60 (s, 2H), 7.00 (dd, 1 H), 7.40 (m, 1 H), 7.50 (m, 1H).
Intermediate 52
Figure imgf000032_0002
Intermediate 45 was reacted as described in general procedure D to afford the title compound as a pale yellow solid (100%). 1 H-NMR (CDCI3) δ2.40 (s, 3H), 4.70 (s, 2H), 7.80 (s, 1 H), 8.30 (s, 2H).
Intermediate 53
Figure imgf000032_0003
Intermediate 46 was reacted as described in general procedure D to afford the title compound as a pale yellow solid (100%). 1 H-NMR (CDCI3) 52.40 (s, 3H), 4.70 (s, 2H), 7.55-7.75 (m, 3H).
Intermediate 54
Figure imgf000032_0004
Chlorosulfonic acid (15mL) was cooled to 0°C. then 10.0 g (0.05M)of ethyl (2-methylphenoxyacetate was added over 10 m. The reaction mixture was stirred at 0-5°C for 30m, the bath was removed and stirring continued for 2 h.
The reaction mixture was poured into ice, forming a white solid which was washed with ice water and dried under high vacuum affording the title compound (12.846 g , 86%). Intermediate 55
Figure imgf000033_0001
2-Fluoro-4-(trifluoromethyl)benzenecarbothioamide
To a solution of 2-fluoro-4-(trifluoromethyl)benzonitrile (5.2g, 27.5mmol) in 50ml methanol was added 10ml of water and NaSHxH2O (7.71 g, 137.5mmol). After heating at 50oC for 12 hours, the solvent was removed in vacuo and the residue treated with water (200ml) and extracted with ethyl acetate (2 x 150ml).
The organic layers were dried (MgSO4) and the solvent evaporated to give crude residue which was purified by Biotage FlashElute with a 40M silica cartridge and eluting with hexanes/ ethyl acetate (4:1 ) To yield 3.27g (53%) of 2-fluoro-4-(trifluoromethyl) benzenecarbothioamide, intermediate 55 as a yellow solid. MS m/z 223 (M+1 )
Intermediate 56
Figure imgf000033_0002
Intermediate 55 was reacted as described in general procedure B to afford the title compound as a light yellow solid (71 %) MS m/z 333 (M+1 )
Intermediate
Figure imgf000033_0003
Intermediate 56 was reacted as described in general procedure C to afford the title compound as a light yellow solid (83%) MS m/z 291 (M+1 ) Intermediate 58
Figure imgf000034_0001
Intermediate 57 was reacted as described in general procedure D to afford the title compound as a light yellow solid (100%)
Rf of starting alcohol in 3:1 hexanes/ethyl acetate is 0.25 Rf of chloride in 3:1 hexanes/ethyl acetate is 0.75
Intermediate 59
Figure imgf000034_0002
4-hydroxy benzyl cyanide was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford, after column chromatography (DCM), a yellow solid (78 %). The solid was refluxed in tetradecane as to afford after column chromatography (DCM:MeOH) the title compound (40 %) as an off-white solid.
Intermediate 60
Figure imgf000034_0003
4-hydroxy-2-methyl benzyl cyanide was treated with dimethyl thiocarbamoyl chloride as described in general procedure 5 to afford, after column chromatography (DCM), a yellow solid (48%). The solid was refluxed in tetradecane as to afford after column chromatography (DCM) the title compound (60%) as an off-white solid. Intermediate 61
Figure imgf000035_0001
A solution of intermediate 59 (1g, 4.5 mmol) and NaOH (0.2g, 5 mmol) in dry MeOH (20 mL) was heated at 70°C for 5 h. Then, intermediate 5 (1.25g, 4.5 mmol) was added and the reaction was stirred at 70°C for one more hour and 18 hours at room temperature. After evaporation of the solvent, the residue was purified by flash column chromatography (DCM) to afford the title compound (71 %) as a yellow oil.
Intermediate
Figure imgf000035_0002
Intermediate 4 and 4-hydroxyphenylacetonitrile were coupled as described in the general procedure 1 to afford the title compound (56%) as a yellow oil .
Intermediate 63
Figure imgf000035_0003
Intermediate 4 and 4-hydroxybenzyl cyanide were coupled as described in the general procedure 1 to afford the title compound (39%) as a pale yellow solid.
Intermediate 64
Figure imgf000035_0004
A solution of intermediate 59 (1g, 4.5 mmol) and NaOH (0.2g, 5 mmol) in dry MeOH (20 mL) was heated at 70°C for 5 h. Then, intermediate 2 (1.65g, 4.5 mmol) was added and the reaction was stirred at 70°C for one more hour and 18 hours at room temperature. After evaporation of the solvent, the residue was purified by flash column chromatography (DCM) to afford the title compound (75%) as a yellow oil. Intermediate 65
Figure imgf000036_0001
Intermediate 2 and 4-hydroxy-2-methyl benzyl cyanide were coupled as described in the general procedure 1 to afford the title compound (26%) as a white yellow solid.
Intermediate 66
Figure imgf000036_0002
A solution of intermediate 60 (1.67g, 7.1 mmol) and NaOH (0.32g, 7.8 mmol) in dry MeOH (20 mL) was heated at 85°C for 5 h. Then, intermediate 2 (1.65g, 4.5 mmol) was added and the reaction was stirred at 85°C for one more hour and 18 hours at room temperature. After evaporation of the solvent, the residue was purified by flash column chromatography (DCM) to afford the title
" compound (20%) as a yellow oil.
EXAMPLES
General Procedure #1 for the Mitsunobu coupling of compounds of structure A with B
To a well stirred solution of A (where X = O) (1.0 mmol), B (0.8 mmol) and
PPh3 (262 mg, 1.0 mmol) in dry THF (8.0 mL) at 0°C, was slowly added Diethylazodicaroxylate (DEAD) (174 mg, 157 μl, 1.0 mmol). The reaction was then stirred 48 h at room temperature. After evaporation the crude mixture was purified by flash column chromatography to afford the desired product.
General procedure #2 for coupling of A with alkyl halides like C
A solution of the A (1.1 mmol), C (1.0 mmol) and Cs2CO3 (2.2mmol) in dry acetonitrile (5.0 mL) was stirred overnight at room temperature. The reaction mixture was diluted with CH2CI2 - (50 mL) and water (50mL). The organic phase was separated and further washed with 1 N NaOH (2 x 50 mL), and water (3 x 50 mL), dried, filtered, and evaporated to afford the final product.
General procedure #3 for hydrolysis of esters.
A solution of the corresponding ester (1 mmol) in THF (10 mL) (in some cases few drops of MeOH were added to help solubility), was treated with 1 N
LiOH in water (2 mL, 2 mmol), and stirred 16 h at room temperature (when reactions were slow, the temperature was elevated to 50°C). The solution was neutralized with 1 N HCI (2 mL, 2 mmol) and the organic solvent evaporated to afford an aqueous solution with an insoluble product. If the insoluble was a solid, it was filtered and dried to afford the final product. If the insoluble was an oil, it was extracted with EtOAc (30 mL). The organic solution was separated, washed with water (2 x 30 mL), dried, filtered, and evaporated to afford the final product.
General procedure #4 for Heck coupling reactions. A suspension of the corresponding α,β-unsaturated ester (44.0 mmol,
1.75 eq.), the corresponding halophenol (25.0 mmol, 1.0 eq.), P(o-Tol)3 (0.76 g, 2.5 mmol, 0.1 eq.), Pd2(dba)3 (0.57 g, 0.63 mmol, 0.025 eq.) and Et3N (2,78 g, 3.83 mL, 27.5 mmol, 1.1 eq.) in dry DMF (10 mL) was stirred overnight at 110°C (oil bath). After cooling to room temperature, it was partitioned between EtOAc (100 mL) and 2 N HCI (100 mL), filtered through celite, washed with more
EtOAc. The organic phase was separated and further washed with water (2 x 100 mL), dried, filtered and evaporated. The residue was purified by flash column chromatography and/or crystallization.
Figure imgf000037_0001
General procedure #5 for the conversion of phenoxyesters to thiophenoxyesters.
A solution of the corresponding phenoxyacid ester (15 mmol), Et3N (3.04 g, 4.18 mL, 30 mmol), 4-dimethylamino pyridine (184 mg, 1.5 mmol) and dimethyl thiocarbamoyl chloride (2.22 g, 18 mmol) in dry dioxane (22.5 mL) was refluxed for 16 h. After cooling down to room temp the mixture was partitioned between EtOAc (300 mL) and water (300 mL). The organic layer was separated, washed with water (2 x 300 mL), dried, filtered and evaporated to afford crude 4-dimethylthiocarbamoyloxy-phenyl ester, that was used in the next step without any further purification.
A suspension of the corresponding crude 4-dimethylthiocarbamoyloxy- phenyl ester (15 mmol) in tetradecane (45 mL) was refluxed for 16 h. After cooling down to room temp., the solvent was decanted and the remaining oil washed several times with hexane. It was purified by flash column chromatography, to afford crude 4-dimethylcarbamoylsulfanyl-phenyl ester.
A solution of the corresponding crude 4-dimethylcarbamoylsulfanyl- phenyl ester (5.0 mmol) in dry MeOH (10 mL) and 0.5 N NaOMe in MeOH (11 mL, 5.5 mmol) was refluxed for 16 h. After cooling down to room temp., the solution was either used without any further purification in the next step or, purified as follows: it was neutralized with 1 N HCI (5.5 mL), and partitioned between EtOAc (200 mL) and water (200 mL). The organic layer was washed with water (2 x 200 mL), dried, filtered, and evaporated to afford crude material. The mixture was purified by flash column chromatography to afford the thiophenoxy ester.
General procedure #6 for coupling 4-dimethylcarbamoylsulfanyl- phenyl acetonitrile with alkyl halides (C)
A solution of the corresponding crude 4-dimethylcarbamoylsulfanyl- phenyl acetonitrile (4.5 mmol) in dry MeOH (10 mL) was added NaOH (0.2g, 5 mmol).The mixture was refluxed for 5 h. Then the alkyl halide was added and the resulting mixture was refluxed for 1 h and stirred at room temperature for 18 hours . The solvent was removed under reduced pressure and the crude product was purified by flash column chromatography to afford the nitrile derivative.
General procedure #7 for the conversion of nitriles to tetrazoles. A mixture of the corresponding nitrile (1.14g, 3.6 mmol, 1eq.), dibutyltin oxide (0.36g, 1.44 mmol, 0.4 eq.) and trimethylsilyl azide (0.53ml, 3.96 mmol, 1.1 eq.) in toluene (30 mL) was stirred overnight at 150°C (oil bath) for 4 hours. The solvent was removed under reduced pressure and chased with methanol. The residue was washed with diethylether to give a solid which was purified by flash column chromatography and/or crystallization to afford the final product.
Figure imgf000039_0001
methyl 2-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methoxy)phenyl]acetate
Intermediate 2 and methyl 4-hydroxyphenylacetate were coupled as described in the general procedure 2 to afford the title compound (52 %) as a white solid.
Example
Figure imgf000039_0002
2-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methoxy)phenyl]acetic acid
Example 1 was hydrolyzed as described in the general procedure 3 to afford the title compound (74 %) as a solid: mp 149 -150°C.
Anal. Calcd. for C20H16NO3F3S: C, 58.96; H, 3.96; N, 3.44; S, 7.87.
Found: C, 58.88; H, 4.04; N, 3.37; S, 7.94.
Example 3
Figure imgf000039_0003
methyl 3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methoxy)phenyl]propanoate
Intermediate 1 and methyl 3-(4'-hydroxyphenyl)-propanoate were coupled as described in the general procedure 1 to afford the title compound (23 %). Example
Figure imgf000040_0001
3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]propanoic acid
Example 3 was hydrolyzed as described in the general procedure 3 to afford the-title compound (72 %) as a solid: mp 172 -174°C.
Anal. Calcd. for C21H18NO3F3S: C, 59.85; H, 4.31 ; N, 3.32. Found: C,
59.79; H, 4.38; N, 3.36.
Example 5
Figure imgf000040_0002
methyl 3-[3-methoxy-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methoxy)phenyl]propanoate
Intermediate 1 and methyl 3-(3'-methoxy-4'-hydroxyphenyl)- propanoate were coupled as described in the general procedure 1 to afford the title compound (22 %).
Example 6
Figure imgf000040_0003
3-[3-methoxy-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]propanoic acid
Example 5 was hydrolyzed as described in the general procedure 3 to afford the title compound (73 %) as a solid: mp 150-152°C. Anal. Calcd. for C22H2QNO4F3S: C, 58.53; H, 4.47; N, 3.10; S, 7.10.
Found: C, 58.31 ; H, 4.45; N, 3.07; S, 6.98. Example 7
Figure imgf000041_0001
Methyl-3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenyl]propanoic acid
Intermediate 4 and methyl-3-(4-hydroxyphenyl)-propanoate were coupled as described in the general procedure 1 to afford the title compound (60 %) as a yellow solid.
Example
Figure imgf000041_0002
3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenyl]propanoic acid Example 7 was hydrolyzed as described in the general procedure 3. The crude material was crystallized from acetone: hexane to afford the title compound (85 %) as a white solid: mp 98-100°C.
Anal. Calcd. for C 1H<flN04F3: C, 62.22; H, 4.48; N, 3.46. Found: C,
62.03; H, 4.51 ; N, 3.46.
Example 9
Figure imgf000041_0003
Methyl-3-[4-(2-{5-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-4- yl}ethoxy)phenyl]propionate
Intermediate 13 and methyl 3-(4'-hydroxyphenyl)-propanoate were coupled as described in the general procedure 1 to afford after column chromatography (hexane:EtOAc, 4:1 ) compound the title compound (20 %) as a white solid. Example
Figure imgf000042_0001
3-[4-(2^5-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-4- yl}ethoxy)phenyl]propanoic acid
Example 9 was hydrolyzed as described in the general procedure to afford the title compound (45 %) as a white solid: mp 142-147°C. HPLC showed one peak at 3.942 min.
Calcd. Mass for C22H20NO3F3S: (M + 1 )+: 436.1194. Found (H.R.M.S):
436.1 173.
Example 11
Figure imgf000042_0002
Methyl 2-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenoxy]acetate
Intermediate 4 and methyl 4-hydroxyphenoxyacetate were coupled as described in the general procedure 1 to afford the title compound (33 %).
Example 12
Figure imgf000042_0003
2-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yi}methoxy)phenoxy]acetic acid
Example 11 was hydrolyzed as described in the general procedure 3 to afford the title compound (43 %) as a white solid: mp 136-138°C.
Anal. Calcd. for C20H16NO5F3: C, 58.87; H, 3.96; N, 3.44. Found: C, 58.88; H, 4.00; N, 3.37.
Example 13
Figure imgf000043_0001
Methyl 3-[4-(2-{4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}ethoxy)phenyl]propanoate
Intermediate 11 and methyl 3-(4'-hydroxyphenyl)-propanoate were coupled as described in the general procedure 1 to afford after flash column chromatography (hexane: EtOAc, 4:1 ) the title compound (40 %) as a white solid.
Example 14
Figure imgf000043_0002
3-[4-(2-{4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}ethoxy)phenyl]propanoic acid
Example 13 was hydrolyzed as described in general procedure 3 to afford the title compound (85 %) as a white solid: mp 128-130°C.
Anal. Calcd. for C22H20NO3F3S: C, 60.68; H, 4.63; N, 3.22; S, 7.36.
Found: C, 60.56; H, 4.65; N, 3.22; S, 7.28.
Example
Figure imgf000043_0003
Methyl 3-[4-({4-methyl-2-[3-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenyl]propanoate
Intermediate 7 and 3-(4'-hydroxyphenyl)-propanoate were coupled as described in the general procedure 1 to afford after column chromatography (hexane:AcOEt, 2:1 ) the title compound (45%) as a colorless oil. Example
Figure imgf000044_0001
3-[4-({4-methyl-2-[3-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenyl]propanoic acid
Example 15 was hydrolyzed as described in the general procedure 3 to afford the title compound (82 %) as a white solid: mp 134-135°C.
Anal. Calcd. for C21H18NO4F3: C, 62.22; H, 4.48; N, 3.46. Found: C,
62.31 ; H, 4.55; N, 3.41.
Example
Figure imgf000044_0002
Methyl (E)-3-[4-({4-methyl-2-[3-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methoxy)phenyl]-2-propenoate
Intermediate 2 and methyl 4-hydroxycinnamate were coupled as described in the general procedure 2 to afford the title compound (92 %) as a yellow solid.
Example
Figure imgf000044_0003
(E)-3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methoxy)phenyl]-2-propenoic acid
Example 17 was hydrolyzed as described in the general procedure. The crude material was crystallized from acetone:water to afford the title compound
(85 %) as a white solid: mp 226 -228°C. Anal. Calcd. for C21H16NO3F3S: C, 60.14; H.3.85; N, 3.34; S, 7.65. Found:
C, 60.07; H, 3.75; N, 3.39; S, 7.65. Example 19
Figure imgf000045_0001
Methyl (E)-3-[3-methoxy-4-({4-methyl-2-[3-(trifluoromethyl)phenyl]- 1,3-thiazol-5-yl}methoxy)phenyl]-2-propenoate
Intermediate 2 and methyl 4-hydroxy-3-methoxycinnamate were coupled as described in the general procedure 2 to afford the title compound (100 %) as a yellow solid.
Example 20
Figure imgf000045_0002
(E)-3-[3-methoxy-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methoxy)phenyl]-2-propenoic acid Example 19 was hydrolyzed as described in general procedure 3. The crude material was crystallized from acetone:water to afford the title compound (62 %) as a white solid: mp 235 -237°C.
Anal. Calcd. for C 22H IBN04 tF3S: C, 58.79; H, 4.04; N, 3.12; S, 7.13.
Found: C, 59.03; H, 4.09; N, 3.13; S, 7.03.
Example 21
Figure imgf000045_0003
Methyl (E)-3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenyl]-2-propenoate
Intermediate 5 and methyl 4-hydroxycinnamate were coupled as described in the general procedure 2 to afford the title compound (60 %) as a solid. Example 22
Figure imgf000046_0001
(E)-3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenyl]-2-propenoic acid
Example 21 was hydrolyzed as described in the general procedure 3 to afford the title compound (92 %) as a white solid: mp 193°C. HPLC showed one peak at 3.689 min.
Calcd. Mass for C21H16NO4F3: (M + 1)+: 404.1110. Found (H.R.M.S):
404.1098.
Example 23
Figure imgf000046_0002
Ethyl 3-[3-methoxy-4-({4-methyl-2-[3-trifluoromethyl)phenyl1-1,3- oxazol-5-yl}methoxy)phenyl]propanoate
Intermediate 5 and ethyl 3-(4-hydroxy-3-methoxyphenyl)propanoate were coupled as described in the general procedure 2 to afford the title compound (89 %) as an oil.
Example 24
Figure imgf000046_0003
3-[3-methoxy-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenyl]propanoic acid
Example 23 was hydrolyzed as described in general procedure 3 to afford the title compound (67 %) as a solid: mp 162 -163°C. Anal. Calcd. for C„H nNO5F3: C, 60.69; H, 4.63; N, 3.22. Found: C,
60.52; H, 4.71 ; N, 3.21. Example 25
Figure imgf000047_0001
Methyl 3-[2-methyl-4-({4-methyl-2-[4-trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methoxy)phenyl]propanoate
Intermediate 2 and intermediate 15 were coupled as described in the general procedure 2 to afford the title compound (94 %) as a brown solid.
Example
Figure imgf000047_0002
3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methoxy)phenyl]propanoic acid
Example 25 was hydrolyzed as described in general procedure 3. The crude material was crystallized from EtOAc:hexane to afford the title compound
(40 %) as yellow solid: mp 141-143 °C.
Anal. Calcd. for C22H20NO3F3S: C, 60.68; H, 4.63; N, 3.22; S, 7.36.
Found: C, 60.44; H, 4.78; N, 3.17; S, 7.25.
Example 27
Figure imgf000047_0003
Methyl (E)-3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3- oxazol-5-yl}methoxy)phenyl]-2-propenoate
Intermediate 5 and intermediate 14 were coupled as described in the general procedure 2 to afford the title compound as a white solid: mp 124- 126°C. (72 %). Example
Figure imgf000048_0001
(E)-3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol- 5-yl}methoxy)phenyl]-2-propenoic acid
Example 27 was hydrolyzed as described in the general procedure to afford the title compound (97 %) as white solid: mp 155-165°C. HPLC showed one peak at 3.579 min.
Calcd. Mass for C22H18NO4F3: (M + 1 )+: 418.1266. Found (H.R.M.S):
418.1278.
Example 29
Figure imgf000048_0002
Methyl 3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- oxazol-5-yl}methoxy)phenyl]propanoate
Intermediate 5 and intermediate 15 were coupled as described in the general procedure 2 to afford the title compound (80 %) as an oil.
Example 30
Figure imgf000048_0003
3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenyl]propanoic acid
Example 29 was hydrolyzed as described in the general procedure 3. The crude material was crystallized from acetone:hexane to afford the title compound
(50 %) as yellow solid: mp 113 - 115 °C. Anal. Calcd. for C22H20NO4F3: C, 63.00; H, 4.81 ; N, 3.34. Found: C,
63.07; H, 4.83; N, 3.43. Example 31
Figure imgf000049_0001
Methyl 2-[4-(2-{4-methyl-2-[4-trifluoromethyl)phenyl]-1,3-thiazol-5- yl}ethoxy)phenyl]acetate
Intermediate 11 and methyl 4-hydroxylphenylacetate were coupled as described in the general procedure 1 to afford after flash column chromatography (hexane: EtOAc, 4:1 ) compound the title compound (42 %) as a white solid.
Example 32
Figure imgf000049_0002
2-[4-(2-{4-methyl-2-[4-(trifluoromethyl)phenyl1-1,3-thiazol-5- yl}ethoxy)phenyl]acetic acid
Example 31 was hydrolyzed as described in general procedure 3. The crude material was crystallized from acetone:water to afford the title compound (97 %) as a white solid: mp 128-130°C
Anal. Calcd. for C21H18NO3F3S: C, 59.85; H, 4.31; N, 3.32; S, 7.61. Found: C, 59.92; H, 4.41 ; N, 3.26; S, 7.52.
Example 33
Figure imgf000049_0003
Methyl-N-[4-(2-[4-trifluromethylphenyl]-4-methyl-thiazol-5- ylmethoxy)anilino]-acetate
Methyl N-(4-hydroxyphenyl)glycinate and intermediate 2 were coupled as described in general procedure 2 to afford the title compound (25%) as a yellow solid.
1H-NMR (acetone-d6) δ2.32(s, 3H), 3.53(s, 3H), 3.75 (s, 2H), 5.08 (s, 2H), 6.43(d, 2H), 6.72(d, 2H), 7.68 (d, 2H), 8.02(d, 2H). MS m/z 437 (M+1 )
Example 34
Figure imgf000050_0001
2-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methoxy)anilino]acetic acid
Example 33 was hydrolyzed as described in the general procedure 3 to afford the title compound (20%) as a yellow solid.
1H-NMR (acetone-d6) δ2.47 (s, 3H), 3.89(s, 2H), 5.09 (s, 2H),6.51(d, 2H), 6.73 (d, 2H), 7.83 (d, 2H), 8.06(d,2H). MS m/z 437(M+1 )-.
Example
Figure imgf000050_0002
methyl 2-[3-chloro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methoxy)phenyl]acetate
Intermediate 2 and methyl-3-chloro-4-hydroxy phenylacetate were coupled as described in general procedure 2 to afford the title compound (70 %) as a yellow solid.
Example 36
Figure imgf000050_0003
2-[3-chloro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl1-1,3-thiazol-5- yl}methoxy)phenyl]acetic acid
Example 35 was hydrolyzed as described in general procedure 3 to afford the title compound (90 %) as a white solid: mp 126-127°C
Anal. Calcd. for C20H15NO3F3SCI: C, 54.37; H, 3.42; N, 3.17. Found: C,
54.41 ; H, 3.41 ; N, 3.24. Example 37
Figure imgf000051_0001
Methyl-N-methyl-N-[4-(2-[4-trifluromethylphenyl]-4-methyl-thiazol-5- ylmethoxy)anilino]-acetate
Intermediate 17 and intermediate 2 were coupled as described in general procedure 2 to afford the title compound (35%) as a yellow solid: 1 H-NMR (acetone-d6) δ2.46(s, 3H), 3.01 (s, 3H), 3.64 (s, 3H), 4.10 (s,3H), 5.25(s, 2H), 6.80(d, 2H), 6.92 (d,2H),7.82(d, 2H),8.18 (d,2H).
MS m/z 451 (M+1 )
Example 38
Figure imgf000051_0002
N-Methyl-N-[4-(2-[4-trifluromethylphenyl]-4-methyl-thiazole-5- ylmethoxy)phenyl]-acetic acid
Example 37 was hydrolyzed as described in general procedure 3 to afford the title compound (45%) as a yellow solid: mp 124-126 C; 1 H-NMR (acetone-d6) δ2.47 (s, 3H), 3.09(s, 3H), 408(s, 2H),5.25 (s, 2H), 6.70(d, 2H),
6.91 (d, 2H), 7.83 (d, 2H), 8.16(d,2H); MS m/z 437(M+1 )-. This compound was unstable and gradually decomposed at ambient temperature.
Figure imgf000051_0003
Example 39 methyl 2-{3-chloro-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- oxazol-5-yl}methyl)sυlfanyl]phenyl}acetate
A solution of intermediate 18 (200 mg, 0.8 mmol) in dry MeOH (2 mL) and 0.5N NaOMe in MeOH (1.6 mL, 0.8 mmol) was heated at 70°Cfor 3 h. Then, intermediate 5 (184 mg, 0.63 mmol) was added and the reaction was stirred at 70°C for one more hour. After evaporation of the solvent, the residue was purified by flash column chromatography (hexane:EtOAc, 9:1 ) to afford the title compound (34%) as a yellow solid.
Figure imgf000052_0001
Example 40 2- 3-chloro-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methyl)sυlfanyl]phenyl}acetic acid
Example 39 was hydrolyzed as described in general procedure 3 to afford the title compound (46 %) as white solid: mp 158-160°C
Anal. Calcd. for C20H15NO3F3SCI 0.20 HCI: C, 53.48; H, 3.42; N, 3.12; S, 7.20. Found: C, 53.55; H, 3.42; N, 3.08; S, 7.17.
Figure imgf000052_0002
Example 41 methyl 2- 4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methyl)sulfanyl]phenoxy}acetate
A solution of intermediate 19 (200 mg, 0.8 mmol) in dry MeOH (2 mL) and 0.5 N NaOMe in MeOH (1.6 mL, 0.8 mmol) was heated at 70°C for 3 h. Then, intermediate 5 (184 mg, 0.63 mmol) was added and the reaction was stirred at 70°C for one more hour. After evaporation of the solvent, the residue was purified by flash column chromatography (hexane: EtOAc, (9:1) to afford the title compound (14%) as a yellow solid.
Figure imgf000053_0001
Example 42
2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
Example 41 was hydrolyzed as described in general procedure 3 to afford the title compound (68 %) as yellow solid: mp 131-133°C
Anal. Calcd. for C20H16NO4F3S: C, 56.73; H, 3.81 ; N, 3.31. Found: C,
57.03; H, 4.05; N, 3.28.
Example 43
Figure imgf000053_0002
Methyl 2-{[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1.3-oxazol-5- yl}methoxy)phenyl]sulfanyl}acetate
Intermediate 5 and methyl 2-(4-hydroxyphenylthio)acetate were coupled as described in the general procedure 2 to afford the title compound (69 %) as an oil.
Example 44
Figure imgf000053_0003
2-{[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenyl]sulfanyl}acetic acid
Example 43 was hydrolyzed as described in general procedure 3 to give crude material, that was purified by flash column chromatography (CHCI3 :MeOH, 9:1 ) and then crystallized from ether to afford the title compound (50 %) as a white solid: mp 138-140°C. HPLC showed one peak at 3.580 min. Calcd. Mass for C20H16NO4F3S: (M + 1 )+: 424.0830. Found (H.R.M.S): 424.0821.
Example 45
Figure imgf000054_0001
Methyl 2-[2-methyl- -({4-methyl-2-[4-trifluoromethyl)phenyl]-1,3- oxazol-5-yl}methoxy)phenoxy]acetate
Intermediate 5 and intermediate 22 were coupled as described in general procedure 1 to afford the title compound (70%) as a brown solid.
Example 46
Figure imgf000054_0002
2-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenoxy]acetic acid
Example 45 was hydrolyzed as described in general procedure 3. The crude material was crystallized from MeOH:water to afford the title compound (90%) as a yellow solid: mp 136-137°C
Anal. Calcd. for C21H18NO5F3: C, 59.86; H, 4.31 ; N, 3.32. Found: C, 59.77; H, 4.45; N, 3.32.)
Figure imgf000054_0003
Example 47 methyl 2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenyl}acetate
A solution of intermediate 23 (200 mg, 0.8 mmol) in dry MeOH (2 mL) and 0.5N NaOMe in MeOH (1.6 mL, 0.8 mmol) was heated at 70°C for 3 h. Then, intermediate 2 (184 mg, 0.63 mmol) was added and the reaction was stirred at
70°C for one more hour. After evaporation of the solvent, the residue was purified by flash column chromatography (hexane:EtOAc, 9:1 ) to afford the title compound (36%) as a yellow solid.
Figure imgf000055_0001
Example 48
2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenyl}acetic acid
Example 47 was hydrolyzed as described in general procedure 3 to afford the title compound (78 %) as white solid: mp 202-203°C
Anal. Calcd. for C20H16NO2F3S2 0.85 HCI: C, 52.86; H, 3.74; N, 3.08.
Found: C, 52.85; H, 3.93; N, 3.11.
Figure imgf000055_0002
Example 49 methyl 2-[3-chloro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- oxazol-5-yl}methoxy)phenyl]acetate
Intermediate 5 and methyl-3-chloro-4-hydroxyphenylacetate were coupled as described in general procedure 2 to afford the title compound (65 %) as a yellow solid.
Figure imgf000055_0003
Example 50
2-[3-chloro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenyl]acetic acid
Example 49 was hydrolyzed as described in general procedure 3 to afford the title compound (73 %) as a white solid: mp 189-191 °C
Anal. Calcd. for C20H15NO4F3CI 1.0 HCI: C, 51.96; H, 3.49; N, 3.03.
Found: C, 51.67; H, 3.65; N, 3.03. Example 51
Figure imgf000056_0001
methyl 2-{3-methoxy-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methyl)sulfanyl]phenyl}acetate
A solution of intermediate 24 (200 mg, 0.8 mmol) in dry MeOH (2 mL) and 0.5 N NaOMe in MeOH (1.6 mL, 0.8 mmol) was heated at 70°C for 3 h. Then, intermediate 2 (184 mg, 0.63 mmol) was added and the reaction was stirred at 70°C for one more hour. After evaporation of the solvent, the residue was purified by flash column chromatography (hexane: EtOAc, 4:1 ) to afford the title compound (32%) as a yellow solid.
Example 52
Figure imgf000056_0002
2-{3-methoxy-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol- 5-yl}methyl)sulfanyl]phenyl}acetic acid
Example 51 was hydrolyzed as described in general procedure 3 to afford the title compound (21 %) as white solid: mp 181-182°C Anal. Calcd. for C21H18NO3F3S2 0.25 HCI: C, 54.52; H, 3.98; N, 3.03.
Found: C, 54.53; H, 4.23; N, 2.79.
Example 53
Figure imgf000056_0003
Methyl 2-[2-methyl- -({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methoxy)phenoxy]acetate Intermediate 2 and intermediate 22 were coupled as described in the general procedure 2 to afford the title compound (74%) as a yellow solid. Example
Figure imgf000057_0001
2-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methoxy)phenoxy]acetic acid
Example 53 was hydrolyzed as described in general procedure 3 to afford the title compound (64%) as a yellow solid: mp 174-176°C
Anal. Calcd. for C 21 H 18 NO4F3S: C, 57.66; H, 4.15; N, 3.20; S, 7.33.
Found: C, 57.67; H, 4.18; N, 3.15; S, 7.30.
Figure imgf000057_0002
Example 55 methyl 2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methyl)sulfanyl]phenyl}acetate
A solution of intermediate 23 (200 mg, 0.8 mmol) in dry MeOH (2 mL) and 0.5N NaOMe in MeOH (1.6 mL, 0.8 mmol) was heated at 70°C for 3 h. Then, intermediate 5 (184 mg, 0.63 mmol) was added and the reaction was stirred at 70°C for one more hour. After evaporation of the solvent, the residue was purified by flash column chromatography (hexane: EtOAc, 4:1 ) to afford the title compound (10%) as a yellow solid.
Figure imgf000057_0003
Example 56
2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methyl)sulfanyl]phenyl}acetic acid Example 55 was hydrolyzed as described in general procedure 3 to afford the title compound (92 %) as white solid: mp 135-136°C
Anal. Calcd. for C20H16NO3F3S 0.50 HCI: C, 56.44; H, 3.91 ; N, 3.29.
Found: C, 56.14; H, 3.85; N, 3.10. Example 57
Figure imgf000058_0001
Methyl (E)-3-[2-methyl-4-({4-methyl-2-[4-trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methoxy)phenyl]-2-propenoate
Intermediate 2 and intermediate 14 were coupled as described in the general procedure 2 to afford the title compound (100 %) as a brown solid.
Example 58
Figure imgf000058_0002
(E)-3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol- 5-yl}methoxy)phenyl]-2-propenoic acid Example 57 was hydrolyzed as described in general procedure 3. The crude material was crystallized from EtOAc:hexane to afford the title compound (25%) as a white solid: mp 200-203 °C.
Anal. Calcd. for C,,HHONO3F3S: C, 60.96; H, 4.19; N, 3.23. Found: C,
60.74; H, 4.23; N, 3.20.
Example 59
Figure imgf000058_0003
methyl 2-{3-chloro-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methyl)sulfanyl]phenyl}acetate
A solution of intermediate 18 (200 mg, 0.8 mmol) in dry MeOH (2 mL) and 0.5N NaOMe in MeOH (1.6 mL, 0.8 mmol) was heated at 70°C for 3 h. Then, intermediate 2 (184 mg, 0.63 mmol) was added and the reaction was stirred at
70°C for one more hour. After evaporation of the solvent, the residue was purified by flash column chromatography (hexane:EtOAc, 9:1 ) to the title compound (54%) as a yellow solid.
Figure imgf000059_0001
Example 60
2-{3-chloro-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenyl}acetic acid
Example 59 was hydrolyzed as described in the general procedure. The crude material was crystallized from acetone:hexane to afford the title compound (96%) as white solid:
Anal. Calcd. for C w,H,κN02F3S2CI : C, 52.46; H, 3.30; N, 3.06; CI, 7.74; S,
14.01. Found: C, 52.44; H, 3.35; N, 3.01 ; CI, 7.83; S, 13.88.
Example 61
Figure imgf000059_0002
methyl 2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
A solution of intermediate 19 (200 mg, 0.8 mmol) in dry MeOH (2 mL) and 0.5N NaOMe in MeOH (1.6 mL, 0.8 mmol) was heated at 70°C for 3 h. Then, intermediate 2 (184 mg, 0.63 mmol) was added and the reaction was stirred at 70°Cfor one more hour. After evaporation of the solvent, the residue was purified by flash column chromatography (hexane:EtOAc, 4:1 ) to afford the title compound (15%) as a yellow solid.
Example
Figure imgf000059_0003
2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
Example 61 was hydrolyzed as described in general procedure 3. The crude material was crystallized from acetone:hexane to afford the title compound (50 %) as yellow solid: mp 190°C. Anal. Calcd. for C20H16NO3F3S2: C, 54.66; H, 3.67; N, 3.19; S, 14.59. Found: C, 54.45; H, 3.71 ; N, 3.02; S, 14.83.
Example 63
Figure imgf000060_0001
Methyl 2-{2-methyl-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- oxazol-5-yl}methyl)sulfanyl]phenoxy}acetate
Intermediate 5 and intermediate 25 were coupled as described in general procedure 2 to afford the title compound (85 %) as brown solid.
Example 64
Figure imgf000060_0002
2-{2-methyl-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
Example 63 was hydrolyzed as described in general procedure 3. The crude material was crystallized from MeOH:water to afford the title compound (67 %) as white solid: mp 156-157°C
Anal. Calcd. for C 21 H 1 B8NO4F3 °S: C, 57.66; H, 4.15; N, 3.20; S, 7.33. Found: C, 57.47; H, 4.14; N, 3.13; S, 7.26.
Example 65
Figure imgf000060_0003
Methyl 2-{2-methyl-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methyl)sulfanyl]phenoxy}acetate
Intermediate 2 and intermediate 25 were coupled as described in general procedure 2 to afford the title compound (87 %) as brown solid. Example
Figure imgf000061_0001
2-{2-methyl-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
Example 65 was hydrolyzed as described in general procedure 3. The crude material was crystallized from MeOH:water to afford the title compound (60 %) as yellow solid: mp 139-141 °C
Anal. Calcd. for C21H18NO3F3S2: C, 55.62; H, 4.00; N, 3.09; S, 14.14.
Found: C, 55.52; H, 4.11 ; N, 3.13; S, 14.29.
Alternative preparation of Example 66
Figure imgf000061_0002
Example 67
2-{2-methyl-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
Intermediate 54 (4.68g, 16mM) was refluxed with 9.6 g of tin powder in ethanol (20mL) and dioxane/HCI (20 mL). After 3 h the reaction mixture was poured into ice and CH2CI2 (200mL) and filtered. The phases were separated and the aqueous layer was extracted 2X 50 mL CH2CI2. The combined organic layers were dried (MgSO4), filtered and evaporated to yield 3.5g (97%). This material readily forms disulfides and therefore was used immediately. It was dissolved in acetonitrile (50mL) with intermediate 2 (4.0 g, 14.0mM) and Cs2CO3 (10.1 g, 31.0 mM) and stirred for 1 h then diluted with ether (200mL) and water (200mL). The phases were separated and the organic phase was washed 2X NaOH 0.1 N (50mL), dried (MgSO4), filtered and evaporated to afford crude product (6.57 g, ) which was slurried in hexane:ether (1 :1 ) and filtered to yield the title compound (5.0g, 74%). This material could be hydrolyzed as above (to yield example 66).
Example 68
Figure imgf000062_0001
ethyl 2-{2-methyl- -[({4-methyl-2-[4-bromophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
Intermediate 47 and intermediate 54 were coupled as described for example 67. The crude material was chromatographed cydohexane/EtOAc (85:15) to afford the title compound (61%) as a clear oil.
1 H-NMR (CDCI3) δ1.45 (t, 3H), 2.35 (s, 3H), 2.45 (s, 3H), 4.30 (s, 2H), 4.45 (q, 2H), 4.80 (s, 2H), 6.75 (d, 1 H), 7.30 (dd, 1 H), 7.40 (d, 1 H), 7.75 (d, 2H), 7.95 (d, 2H).
Figure imgf000062_0002
2-{2-methyl-4-[({4-methyl-2-[4-bromophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
Example 68 was hydrolyzed as described in general procedure 3. The crude material was chromatographed C^CI^MeOH (85:15) to afford the title compound (59%) as white solid: mp >250°C.
MS m/z 465 (M+1)
Example 70
Figure imgf000062_0003
ethyl 2- 2-methyl-4-[({4-methyl-2-[4-chlorophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate Intermediate 48 and intermediate 54 were coupled as described for example 67. The crude material was chromatographed petroleum ether/EtOAc (90:10) to afford the title compound (53%) as clear oil that solidified upon standing.
1 H-NMR (CDCI3) δ1.15 (t, 3H), 2.00 (s, 3H), 2.10 (s, 3H), 3.90 (s, 2H), 4.05 (q, 2H), 4.45 (s, 2H), 6.45 (d, 1 H), 6.95 (dd, 1 H), 7.00 (d, 1 H), 7.20 (d, 2H), 7.65 (d, 2H).
MS m/z 447
Example
Figure imgf000063_0001
2-{2-methyl-4-[({4-methyl-2-[4-chlorophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
Example 70 was hydrolyzed as described in general procedure 3. The crude material was crystallized from acetonotrile to afford the title compound (73%) as a pale yellow solid: mp 109°C.
MS m/z 420
Example 72
Figure imgf000063_0002
ethyl 2-{2-methyl-4-[({4-methyl-2-[4-fluorophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
Intermediate 49 and intermediate 54 were coupled as described for example 67. The crude material was chromatographed CH2CI2 (100%) to afford the title compound (72%) as a clear oil that solidified on standing.
1 H-NMR (CDCI3) 51.45 (t, 3H), 2.35 (s, 3H), 2.45 (s, 3H), 4.25 (s, 2H), 4.35 (q, 2H), 4.80 (s, 2H), 6.75 (d, 1 H), 7.30 (m, 3H), 7.40 (d, 1 H), 8.05 (m, 2H).
MS m/z 431
Example 73
Figure imgf000063_0003
2-{2-methyl-4-[({4-methyl-2-[4-fluorophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
Example 72 was hydrolyzed as described in general procedure 3 to afford the title compound (73%) as yellow foam: mp 45-46°C.
Anal. Calcd. for C20H18FNO3S2: C, 59.53; H, 4.50; N, 3.47; S, 15.89. Found: C, 59.67; H, 5.11 ; N, 3.38; S, 15.96.
MS m/z 404 (M+1 )
Example 74
Figure imgf000064_0001
ethyl 2-{2-methyl-4-[({4-methyl-2-[3,4-dichlorophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
Intermediate 50 and intermediate 54 were coupled as described for example 67. The crude material was chromatographed CH2CI2 (100%) to afford the title compound (49%) as a clear oil that solidified on standing. 1 H-NMR (CDCI3) 51.25 (t, 3H), 2.10 (s, 3H), 2.20 (s, 3H), 4.05 (s, 2H),
4.15 (q, 2H), 4.55 (s, 2H), 6.50 (d, 1 H), 7.05 (dd, 1 H), 7.15 (d, 1 H), 7.40 (d, 1 H), 7.60 (dd, 1 H), 7.90 (d, 1 H).
Example
Figure imgf000064_0002
2-{2-methyl-4-[({4-methyl-2-[3,4-dichlorophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
Example 74 was hydrolyzed as described in general procedure 3. The crude material was precipitated from ether to afford the title compound (75%) as a white solid: mp 143°C. Anal. Calcd. for C20H17CI2NO3S2„0.2H2O: C, 52.03; H, 3.75; N, 3.03; S,
13.89. Found: C, 52.00; H, 3.321 ; N, 2.96; S, 12.76. Example 76
Figure imgf000065_0001
ethyl 2-{2-methyl-4-[({4-methyl-2-[3,4-difluorophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
Intermediate 51 and intermediate 54 were coupled as described for example 67. The crude material was chromatographed heptane/EtOAc (8/2) to afford the title compound (79%) as a yellow solid.
1 H-NMR (CDCI3) 51.05 (t, 3H), 1.95 (s, 3H), 2.05 (s, 3H), 3.85 (s, 2H), 4.05 (q, 2H), 4.40 (s, 2H), 6.40 (d, 1 H), 6.85-7.05 (m, 3H), 7.35 (m, 1 H), 7.55 (m, 1 H).
MS m/z 449
Figure imgf000065_0002
2-{2-methyl-4-[({4-methyl-2-[3,4-difluorophenyl]-1,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid Example 76 was hydrolyzed as described in general procedure 3. The crude material was crystallized from acetonitrile to afford the title compound (77%) as yellow solid: mp 119°C. MS m/z 422 (M+1 )
Example 78
Figure imgf000065_0003
ethyl 2-{2-methyl-4-[({4-methyl-2-[3,5-bis(trifluoromethyl)phenyl]-1 ,3- thiazol-5-yl}methyl)sulfanyl]phenoxy}acetate
Intermediate 52 and intermediate 54 were coupled as described for example 67. The crude material was chromatographed cydohexane/EtOAc (8/2) to afford the title compound (70%) as a clear oil that solidified on standing. 1 H-NMR (CDCI3) 81.20 (t, 3H), 2.15 (s, 3H), 2.20 (s, 3H), 4.05 (s, 2H), 4.15 (q, 2H), 4.55 (s, 2H), 6.50 (d, 1 H), 7.05 (dd, 1 H), 7.10 (d, 1 H), 7.80 (s, 1 H), 8.20 (s, 2H).
Example 79
Figure imgf000066_0001
2-{2-methyl-4-[({4-methyl-2-[3,5-bis(trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methyl)sulfanyl]phenoxy}acetic acid
Example 78 was hydrolyzed as described in general procedure 3. The crude material was precipitated from ether to afford the title compound (89%) as a white solid: mp 178°C.
Anal. Calcd. for C^H^NO^: C, 50.67; H, 3.29; N, 2.69; S, 12.30. Found: C, 50.88; H, 3.68; N, 2.64; S, 10.40.
Example 80
Figure imgf000066_0002
ethyl 2-{2-methyl-4-[({4-methyl-2-[3-fluoro-4-(trifluoromethyl)phenyl]- 1,3-thiazol-5-yl}methyl)sulfanyl]phenoxy}acetate
Intermediate 53 and intermediate 54 were coupled as described for example 67. The crude material was chromatographed CH2CI2 (100%) to afford the title compound (50%) as a clear oil that solidified on standing.
1 H-NMR (CDCI3) δ1.20 (t, 3H), 2.15 (s, 3H), 2.20 (s, 3H), 4.05 (s, 2H), 4.15 (q, 2H), 4.55 (s, 2H), 6.55 (d, 1 H), 7.05 (dd, 1 H), 7.15 (d, 1 H), 7.55 (t, 1 H), 7.65 (m, 2H).
MS m/z 500 (M+1 ) Example 81
Figure imgf000067_0001
2-{2-methyl-4-[({4-methyl-2-[3-fluoro-4-(trifluoromethyl)phenyl]-1,3- thiazol-5-yl}methyl)sulfanyl]phenoxy}acetic acid
Example 80 was hydrolyzed as described in general procedure 3. The crude material was precipitated from ether to afford the title compound (81 %) as a yellow foam: mp <50°C.
Anal. Calcd. for C21H17F4NO3S2: C, 53.50; H, 3.63; N, 2.97; S, 13.60. Found: C53.86; H, 3.63; N, 2.87; S, 13.82.
MS m/z 472 (M+1)
Example 82
Figure imgf000067_0002
Ethyl {4-[({2-[2-fluoro-4-(trifluoromethyl)phenyl]-4-methyl-1,3-thiazol- 5-yl}methyl)sulfanyl]-2-methylphenoxy}acetate Intermediate 58 was reacted with Intermediate 25 as described in general procedure 2 to afford the title compound as a yellow oil. (100%) MS m/z 499 (M+1 )
Example
Figure imgf000067_0003
{4-[({2-[2-fluoro-4-(trifluoromethyl)phenyl]-4-methyl-1,3-thiazol-5- yl}methyl)sulfanyl]-2-methylphenoxy}acetic acid
Example 82 was reacted as described in general procedure 3 to afford the title compound as a white solid (9%) MS m/z 471 (M+1 ) 1 H NMR (CD3OD) δ= 2.19 (s,CH3), 2.22 (s,CH3), 4.24 (s,CH2), 4.70 (s,CH2), 6.75 (d,1 Harom) 7.21 (m,2Harom), 7.65 (m,2Harom), 8.35 (t,1 Harom)
Example 84
Figure imgf000068_0001
5-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)phenoxymethyl]-2H-tetrazole
Intermediate 62 was reacted with dibutyltin oxide and trimethylsilyl azide as described in the general procedure to afford the title compound (40.6%) as a white solid: mp 156°C.
Example 85
Figure imgf000068_0002
5-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}methoxy)benzyl]-2H-tetrazole
Intermediate 63 was reacted with dibutyltin oxide and trimethylsilyl azide as described in the general procedure to afford the title compound (73%) as a white solid: mp 208°C.
Example 86
Figure imgf000068_0003
5-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-oxazol-5- yl}sulfanyl)benzyl]-2H-tetrazole Intermediate 61 was reacted with dibutyltin oxide and trimethylsilyl azide as described in general procedure #7 to afford the title compound (87%) as a white solid: mp 214°C.
Example 87
Figure imgf000069_0001
5-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}sulfanyl)benzyl]-2H-tetrazole
Intermediate 64 was reacted with dibutyltin oxide and trimethylsilyl azide as described in general procedure #7 to afford the title compound (80%) as a white solid: mp 177°C.
Example 88
Figure imgf000069_0002
5-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}methoxy)benzyl]-2H-tetrazole
Intermediate 65 was reacted with dibutyltin oxide and trimethylsilyl azide as described in general procedure #7 to afford the title compound (44%) as a white solid: mp 165°C.
Example 89
Figure imgf000069_0003
5-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5- yl}sulfanyl)benzyl]-2H-tetrazole
Intermediate 62 was reacted with dibutyltin oxide and trimethylsilyl azide as described in general procedure #7 to afford the title compound (5%) as a white solid: mp 248°C. Binding Assay:
Compounds were tested for their ability to bind to hPPARγ hPPARα, or PPARδ using a Scintillation Proximity Assay (SPA). The PPAR ligand binding domain (LBD) was expressed in E. coli as polyHis tagged fusion proteins and purified. The LBD was then labeled with biotin and immobilized on streptavidin- modified scintillation proximity beads. The beads were then incubated with a constant amount of the appropriate radioligand (3H-BRL 49653 for PPARγ, 2-(4- (2-(2,3-Ditritio-1-heptyl-3-(2,4-difluorophenyl)ureido)ethyl)phenoxy)-2- methylbutanoic acid (described in WO/008002) for hPPARα and GW 2433 (see
Brown, P. J et al . Chem. Biol. 1997, 4, 909-918. For the structure and synthesis of this ligand) for PPARδ) and variable concentrations of test compound, and after equilibration the radioactivity bound to the beads was measured by a scintillation counter. The amount of nonspecific binding, as assessed by control wells containing 50 μM of the corresponding unlabelled ligand, was subtracted from each data point. For each compound tested, plots of ligand concentration vs. CPM of radioligand bound were constructed and apparent K, values were estimated from nonlinear least squares fit of the data assuming simple competitive binding. The details of this assay have been reported elsewhere (see, Blanchard, S. G. et. al. Development of a Scintillation Proximity Assay for
Peroxisome Proliferator-Activated Receptor gamma Ligand Binding Domain. Anal. Biochem. 1998, 257, 112-119).
Apparent pKj values were >6.5 for all of the acid Examples described above (pK| = -log of the concentration of test compound required to achieve an apparent Ki value according to the equation K; = IC50 / 1 + [L]/Kd, where IC50 = the concentration of test compound required to inhibit 50% of the specific binding of the radioligand, [L] is the concentration of the radioligand used, and Kd is the dissociation constant for the radioligand at the receptor). The ester precursors of the carboxylic acids (e.g. Example 61 ) had pKi's of less than 6.5 but frequently these esters were active in the transient transfection assay described below, presumably because they hydrolyzed to active acids under the assay conditions. Transfection assay:
Compounds were screened for functional potency in transient transfection assays in CV-1 cells for their ability to activate the PPAR subtypes (transactivation assay). A previously established chimeric receptor system was utilized to allow comparison of the relative transcripflonal activity of the receptor subtypes on the same target gene and to prevent endogenous receptor activation from complicating the interpretation of results. See, for example, Lehmann, J. M.; Moore, L. B.; Simth-Oliver, T. A.; Wilkison, W. O.; Willson, T. M.; Kliewer, S. A., An antidiabetic thiazolidinedione is a high affinity ligand for peroxisome proliferator-activated receptor γ (PPARγ), J. Biol. Chem., 1995, 270,
12953-6. The ligand binding domains for murine and human PPARα, PPARγ, and PPARδ were each fused to the yeast transcription factor GAL4 DNA binding domain. CV-1 cells were transiently transfected with expression vectors for the respective PPAR chimera along with a reporter construct containing five copies of the GAL4 DNA binding site driving expression of secreted placental alkaline phosphatase (SPAP) and β-galactosidase. After 16 h, the medium was exchanged to DME medium supplemented with 10% delipidated fetal calf serum and the test compound at the appropriate concentration. After an additional 24 h, cell extracts were prepared and assayed for alkaline phosphatase and β- galactosidase activity. Alkaline phosphatase activity was corrected for transfection efficiency using the β-galactosidase activity as an internal standard (see, for example, Kliewer, S. A., et. al. Cell 83, 813-819 (1995)). Rosiglitazone (BRL 49653) was used as a positive control in the hPPARy assay. The positive control in the hPPARα and hPPARδ assays was 2-[4-(2-(3-(4-fluorophenyl)-1- heptylureido)ethyl)-phenoxy]-2-methylpropionic acid, which can be prepared as described in Brown, Peter J., et. al. Synthesis Issue 7, 778-782 (1997), or patent publication WO 9736579.
All of the above acid Examples showed at least 50% activation hPPARδ relative to the positive control at concentrations of 10"7 M or less. Most of the above acid Examples were at least 10-fold selective for hPPARδ over hPPARα and hPPARy.
In vivo evaluations:
In vivo experiments were performed in db/db mice approximately 60 days old. Animals were randomized into vehicle or compound (n /group) with administration by oral gavage for 7 days, at a volume of 5 ml/kg, b.i.d. After 7 days of treatment animals were anesthetized with isofluorane gas and bled by cardiac puncture for analysis of serum glucose, triglyceride, total and HDL cholesterol, and non-esterified free fatty acid concentrations. The compound of Example 66 was examined in a Rhesus model. A 6- month dose escalation study in obese rhesus monkeys raised HDLc with each dose (0.1 , 0.3, 1 , and 3 mg/kg bid for 28 days). HDLc increased by more than 40% in each monkey at the 3 mg/kg dose. NMR analysis of lipoprotein particle composition showed a shift in the LDLc composition to fewer and larger LDLc particles. Serum TG concentrations decreased by more than 30% in each monkey. Fasting insulin decreased by more than 20% in each monkey. Serum fibrinogen concentrations decreased by 10-20%, with peak activity observed at doses of 0.3 and 1 mg/kg.

Claims

What is claimed is:
1. A compound of formula (I) and pharmaceutically acceptable salts and solvates thereof;
Figure imgf000073_0001
(i)
Wherein X represents a COOH (or a hydrolysable ester thereof) or tetrazole group.
X1 is NH, NCH3, O, S, a bond (i.e. is absent), CH2, or CH where the dashed line indicates that when X1 is CH the depicted bond is a double bond;
X2 represents O, S; R1 and R2 independently represent H, CH3, OCH3 or halogen. n is 1 or 2. one of Y and Z is N and the other is S or O; y represents 0, 1 , 2, 3, 4, 5;
Each R3 independently represents CF3 or halogen.
2. A compound of formula (I) which is a hPPARδ agonist.
3. A compound according to claim 2 which is a selective hPPARδ agonist.
4. A compound according to claim 1 , 2 or 3 wherein X is COOH.
5. A compound according to claim 1 , 2, 3 or 4 wherein X1 represents O, S or is absent.
6. A compound according to claim 4 wherein X1 represents O.
7. A compound according to claims 1-5 wherein X2 represents S.
8. A compound according to claims 1-6 wherein R1 is CH3.
9. A compound according to any of claims 1-8 wherein R2 is H.
10. A compound according to claims 1-9 wherein Z represents N.
11. A compound according to claims 1 -10 wherein Y represents S.
12. A compound according to claims 1-11 wherein n represents 1.
13. A compound according to any of claims 1-12 wherein y represents 1 or 2.
14. A compound according to claim 13 wherein y represents 2.
15. A compound according to claim 14 wherein the one of R3 substituents is halogen.
16. A compound according to claim 15 wherein one of the R3 subsitutents is halogen and the other is CF3.
17. A compound according to claim 13 wherein y represents 1.
18. A compound according to claim 17 wherein the R3 substituent is in the para position.
19. A compound according to claim 18 wherein R3 is CF3.
20. A compound of formula (II) and pharmaceutically acceptable salts, solvates and hydrolysable esters thereof wherein
X1 is NH, NCH3, O, S, a bond (i.e. is absent), CH2, or CH where the dashed line indicates that when X1 is CH the depicted bond is a double bond;
X2 is O or S;
R1 is H, CH3, OCH3, or halogen; R2 is H, OCH3, or halogen n is 1 or 2; one of Y and Z is N and the other is S or O.
R3 is H, CF3 or halogen.
21. A compound selected from:
2-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenoxy]acetic acid
3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]propanoic acid
3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenyl]propanoic acid 2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)sulfanyl]phenyl}acetic acid
2-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenoxy]acetic acid
3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]propanoic acid
(E)-3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenyl]-2-propenoic acid methyl 3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]propanoate 2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenyl}acetic acid 2-({4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)sulfanyl]phenyl}sulfanyl)acetic acid
2-[methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)anilino]acetic acid 2-{3-chloro-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)suifanyl]phenyl}acetic acid
2-[2-chloro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenoxy]acetic acid
2-[3-chioro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]acetic acid
2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
(E)-3-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenyl]-2-propenoic acid 2-[4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenoxy]acetic acid
2-[3-fluoro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]acetic acid methyl 2-[3-chloro-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methoxy)phenyl]acetate
2-{2-methyl-4-[({4-methyl-2-[4-bromophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[4-bromophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate 2-{2-methyl-4-[({4-methyl-2-[4-chlorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[4-chlorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
2-{2-methyl-4-[({4-methyl-2-[4-fluorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[4-fluorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
2-{2-methyl-4-[({4-methyl-2-[3,4-difluorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[3,4-difluorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
2-{2-methyl-4-[({4-methyl-2-[3,4-dichlorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl2-{2-methyl-4-[({4-methyl-2-[3,4-dichlorophenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
2-{2-methyl-4-[({4-methyl-2-[3,5-bis(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid ethyl 2-{2-methyl-4-[({4-methyl-2-[3,5-bis(trifluoromethyl)phenyl]-1 ,3- thiazol-5-yl}methyl)sulfanyl]phenoxy}acetate ethyl 2-{2-methyl-4-[({4-methyl-2-[3-fluoro-4-(trifluoromethyl)phenyl]-1 ,3- thiazol-5-yl}methyl)sulfanyl]phenoxy}acetate
22. A compound selected from: 2-{2-methyl-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
2-{2-methyl-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-oxazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid methyl 2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetate
2-{4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid
(E)-3-[2-methyl-4-({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methoxy)phenyl]-2-propenoic acid 2-{3-chloro-4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)suifanyl]phenyl}acetic acid
2-{2-methyl-4-[({4-methyl-2-[3-fluoro-4-(trifluoromethyl)phenyl]-1 ,3-thiazol-
5-yl}methyl)sulfanyl]phenoxy}acetic acid
23. 2-{2-methyl-4[({4-methyl-2[4-(trifluoromethyl)phenyl]-1 ,3-thiazol-5- yl}methyl)sulfanyl]phenoxy}acetic acid.
24. A pharmaceutical composition comprising a compound of any of claims 1- 23.
25. A pharmaceutical composition according to claim 24 further comprising a pharmaceutically acceptable diluent or carrier.
26. A compound according to any of claims 1-23 for use in therapy.
27. Use of a compound according to any of claims 1-23 for the manufacture of a medicament for the prevention or treatment of a hPPARδ mediated disease or condition.
28. Use according to claim 27 wherein the hPPARδ mediated disease or condition is dyslipidemia, syndrome X, heart failure, hypercholesteremia, cardiovascular disease, Type 2 diabetes mellitus, Type 1 diabetes, insulin resistance hyperlipidemia, obesity, anorexia bulimia, and anorexia nervosa.
29. A method of treatment of a hPPARδ mediated disease or condition comprising administering a therapeutically effective amount of a compound according to any of claims 1-23.
30. A method according to claim 29 wherein the hPPARδ mediated disease or condition is dyslipidemia, syndrome X, heart failure, hypercholesteremia, cardiovascular disease, Type 2 diabetes mellitus, Type 1 diabetes, insulin resistance, hyperlipidemia, obesity, anorexia bulimia, and anorexia nervosa.
31. A method for lowering triglycerides in a subject comprising the administration of a therapeutic amount of a hPPAR delta agonist.
32. Use of a hPPAR delta agonist for the manufacture of a medicament for the lowering of triglycerides in a patient in need thereof.
33. Use according to claim 32 or a method according to claim 31 wherein the hPPAR delta agonist is a selective agonist.
34. Use or a method according to claim 33 wherein the agonist is a compound according to claims 1-23.
35. A method for treating Type 2 diabetes, decreasing insulin resistance or lowering blood pressure in a subject comprising the administration of a therapeutic amount of a hPPAR delta agonist.
36. Use of a hPPAR delta agonist for the manufacture of a medicament for the treatment of Type 2 diabetes, decreasing insulin resistance or lowering blood pressure in a patient in need thereof.
37. Use according to claim 36 or a method according to claim 35 wherein the hPPAR delta agonist is a selective agonist.
38. Use or a method according to claim 37 wherein the agonist is a compound according to claims 1-23.
39. A method for decreasing fibrogen levels in a subject comprising the administration of a therapeutic amount of a hPPAR delta agonist.
40. Use of a hPPAR delta agonist for the manufacture of a medicament for the decreasing fibrogen levels in a patient in need thereof.
41. Use according to claim 40 or a method according to claim 39 wherein the hPPAR delta agonist is a selective agonist.
42. Use or a method according to claim 41 wherein the agonist is a compound according to claims 1-23.
43. A method for decreasing LDLc in a subject comprising the administration of a therapeutic amount of a hPPAR delta agonist.
44. Use of a hPPAR delta agonist for the manufacture of a medicament for the decreasing LDLc in a patient in need thereof.
45. Use according to claim 44 or a method according to claim 43 wherein the hPPAR delta agonist is a selective agonist.
46. Use or a method according to claim 45 wherein the agonist is a compound according to claims 1-23.
47. A method for shifting LDL particle size from small dense to normal dense LDL in a subject comprising the administration of a therapeutic amount of a hPPAR delta agonist.
48. Use of a hPPAR delta agonist for the manufacture of a medicament for shifting LDL particle size from small dense to normal dense LDL in a patient in need thereof.
49. Use according to claim 48 or a method according to claim 47 wherein the hPPAR delta agonist is a selective agonist.
50. Use or a method according to claim 49 wherein the agonist is a compound according to claims 1-23.
PCT/EP2000/005720 1999-06-25 2000-06-22 Thiazole and oxazole derivatives and their pharmaceutical use WO2001000603A1 (en)

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