Patent Application
20100048453
1. Field of the Invention
The invention provides compounds, pharmacutical compositions comprising such compounds and methods of using such compounds to treat or prevent diseases or disorders associated with the activity of the Peroxisome Proliferator-Activated Receptor (PPAR) families.
2. Background
Peroxisome Proliferator Activated Receptors (PPARs) are members of the nuclear hormone receptor super family, which are ligand-activated transcription factors regulating gene expression. Certain PPARs are associated with a number of disease states including dyslipidemia, hyperlipidemia, hypercholesteremia, atherosclerosis, atherogenesis, hypertriglyceridemia, heart failure, myocardial infarction, vascular diseases, cardiovascular diseases, hypertension, obesity, inflammation, arthritis, cancer, Alzheimer's disease, skin disorders, respiratory diseases, ophthalmic disorders, IBDs (irritable bowel disease), ulcerative colitis and Crohn's disease. Accordingly, molecules that modulate the activity of PPARs are useful as therapeutic agents in the treatment of such diseases.
In one aspect, the present invention provides compounds of Formula I:
in which
n is selected from 0, 1, 2 and 3;
p is selected from 0, 1, 2 and 3;
Y is selected from O, S(O)0-2, NR7a and CR7aR7b; wherein R7a and R7b are independently selected from hydrogen and C1-6alkyl;
W is selected from O and S;
R1 is selected from —X1CR9R10X2CO2R11, —X1SCR9R10X2CO2R11 and —X10CR9R10X2CO2R11; wherein X1 and X2 are independently selected from a bond and C1-4alkylene; and R9 and R10 are independently selected from hydrogen, C1-4alkyl and C1-4alkoxy; or R9 and R10 together with the carbon atom to which R9 and R10 are attached form C3-12cycloalkyl; and R11 is selected from hydrogen and C1-6alkyl; each
R2 is independently selected from halo, C1-6alkyl, C2-6alkenyl, C1-4alkoxy, C1-4alkylthio, C3-12cycloalkyl, C3-8heterocycloalkyl, C6-10aryl and C5-10heteroaryl; wherein any aryl, heteroaryl, cycloalkyl or heterocycloalkyl of R2 is optionally substituted with 1 to 3 radicals independently selected from halo, C1-6alkyl, C1-6alkoxy, C2-6alkenyl, C1-6alkylthio, halo-substituted-C1-6alkyl, halo-substituted-C1-6alkoxy, —C(O)R14a and NR14aR14b; wherein R14a and R14b are independently selected from hydrogen and C1-6alkyl;
R3 and R4 are independently selected from hydrogen and C1-6alkyl;
R5 and R6 are independently selected from hydrogen, C1-6alkyl, C3-12cycloalkyl, C3-8-heterocycloalkyl, C6-10aryl and C5-13heteroaryl;
wherein any aryl, heteroaryl, cycloalkyl and heterocycloalkyl of R5 and R6 is optionally substituted with 1 to 3 radicals independently selected from halo, nitro, cyano, C1-6alkyl, C1-6alkoxy, C1-6alkylthio, hydroxy-C1-6alkyl, halo-substituted-C1-6alkyl, halo-substituted-C1-6alkoxy, C3-12cycloalkyl, C3-8heterocycloalkyl, C6-10aryl, C5-13heteroaryl, —XS(O)0-2R12, —XS(O)0-2XR13, —XNR12R12, —XNR12S(O)0-2R12, —XNR12C(O)R12, —XC(O)NR12R12, —XNR12C(O)R13, —XC(O)NR12R13, —XC(O)R13, —XNR12XR13 and —XOXR13; wherein any aryl, heteroaryl, cycloalkyl or heterocycloalkyl substituent is further optionally substituted with 1 to 3 radicals independently selected from halo, nitro, cyano, C1-6alkyl, C1-6alkoxy, C1-6alkylthio, hydroxy-C1-6alkyl, halo-substituted-C1-6alkyl and halo-substituted-C1-6alkoxy; wherein X is a bond or C1-4alkylene; R12 is selected from hydrogen and C1-6alkyl; and R13 is selected from C3-12cycloalkyl, C3-8heterocycloalkyl, C6-10aryl and C5-10heteroaryl; wherein any aryl, heteroaryl, cycloalkyl or heterocycloalkyl of R13 is optionally substituted with 1 to 3 radicals independently selected from halo, nitro, cyano, C1-6alkyl, C1-6alkoxy, halo-substituted-C1-6alkyl and halo-substituted-C1-6alkoxy; with the proviso that either R5 or R6, but not both R5 and R6, must be hydrogen or methyl;
R7 is selected from hydrogen, C1-6alkyl, C6-12aryl-C0-4alkyl, C3-12cycloalkyl-C0-4alkyl, —XOR14a and —XNR14aR14b; wherein X is a bond or C1-4alkylene; and R14a and R14b are independently selected from hydrogen and C1-6alkyl; and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixture of isomers thereof; and the pharmaceutically acceptable salts and solvates (e.g. hydrates) of such compounds.
In a second aspect, the present invention provides a pharmaceutical composition that contains a compound of Formula I or a N-oxide derivative, individual isomers and mixture of isomers thereof; or a pharmaceutically acceptable salt thereof, in admixture with one or more suitable excipients.
In a third aspect, the present invention provides a method of treating a disease in an animal in which modulation of PPAR activity can prevent, inhibit or ameliorate the pathology and/or symptomology of the diseases, which method comprises administering to the animal a therapeutically effective amount of a compound of Formula I or a N-oxide derivative, individual isomers and mixture of isomers thereof, or a pharmaceutically acceptable salt thereof.
In a fourth aspect, the present invention provides the use of a compound of Formula I in the manufacture of a medicament for treating a disease in an animal in which PPAR activity contributes to the pathology and/or symptomology of the disease.
In a fifth aspect, the present invention provides a process for preparing compounds of Formula I and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixture of isomers thereof, and the pharmaceutically acceptable salts thereof.
“Alkyl” as a group and as a structural element of other groups, for example halo-substituted-alkyl and alkoxy, can be either straight-chained or branched. C1-6alkoxy includes, methoxy, ethoxy, and the like. Halo-substituted alkyl includes trifluoromethyl, pentafluoroethyl, and the like.
“Aryl” means a monocyclic or fused bicyclic aromatic ring assembly containing six to ten ring carbon atoms. For example, aryl can be phenyl or naphthyl, preferably phenyl. “Arylene” means a divalent radical derived from an aryl group. “Heteroaryl” is as defined for aryl where one or more of the ring members are a heteroatom. For example heteroaryl includes pyridyl, indolyl, indazolyl, quinoxalinyl, quinolinyl, benzofuranyl, benzopyranyl, benzothiopyranyl, benzo[1,3]dioxole, imidazolyl, benzo-imidazolyl, pyrimidinyl, furanyl, oxazolyl, isoxazolyl, triazolyl, tetrazolyl, pyrazolyl, thienyl, etc. “C6-10arylC0-4alkyl” means an aryl as described above connected via a alkylene grouping. For example, C6-10arylC0-4alkyl includes phenethyl, benzyl, etc.
“Cycloalkyl” means a saturated or partially unsaturated, monocyclic, fused bicyclic or bridged polycyclic ring assembly containing the number of ring atoms indicated. For example, C3-10cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc. “Heterocycloalkyl” means cycloalkyl, as defined in this application, provided that one or more of the ring carbons indicated, are replaced by a moiety selected from —O—, —N═, —NR—, —C(O)—, —S—, —S(O)— or —S(O)2—, wherein R is hydrogen, C1-4alkyl or a nitrogen protecting group. For example, C3-8heterocycloalkyl as used in this application to describe compounds of the invention includes morpholino, pyrrolidinyl, piperazinyl, piperidinyl, piperidinylone, 1,4-dioxa-8-aza-spiro[4.5]dec-8-yl, etc.
“Halogen” (or halo) preferably represents chloro or fluoro, but can also be bromo or iodo.
“Treat”, “treating” and “treatment” refer to a method of alleviating or abating a disease and/or its attendant symptoms.
The present invention provides compounds, compositions and methods for the treatment of diseases in which modulation of one or more PPARs can prevent, inhibit or ameliorate the pathology and/or symptomology of the diseases, which method comprises administering to the animal a therapeutically effective amount of a compound of Formula I.
In one embodiment, with reference to compounds of Formula I:
n is selected from 0, 1, 2 and 3;
p is selected from 0, 1 and 2;
Y is selected from O, CH2 and S(O)0-2;
Z is selected from CR8aR8b and S; wherein R8a and R8b are independently selected from hydrogen and C1-6alkyl;
W is selected from O and S;
R1 is selected from —X1CR9R10X2CO2R11, —X1SCR9R10X2CO2R11, and —X1OCR9R10X2CO2R11; wherein X1 and X2 are independently selected from a bond and C1-4alkylene; and R9 and R10 are independently selected from hydrogen, C1-4alkyl and C1-4alkoxy; or R9 and R10 together with the carbon atom to which R9 and R10 are attached form C3-12cycloalkyl; and R1 is selected from hydrogen and C1-6alkyl; each is independently selected from C1-6alkyl, C2-6alkenyl, C1-4alkoxy, C1- 4alkylthio, C3-12cycloalkyl, C3-8heterocycloalkyl, C6-10aryl and C5-10heteroaryl; wherein any aryl, heteroaryl, cycloalkyl or heterocycloalkyl of R2 is optionally substituted with 1 to 3 radicals independently selected from halo, C1-6alkoxy, C1-6alkylthio, halo-substituted-C1-6alkoxy, —C(O)R14a and NR14aR14b; wherein R14a and R14b are independently selected from hydrogen and C1-6alkyl;
R3 and R4 are independently selected from hydrogen and C1-6alkyl;
R5 is C6-10aryl optionally substituted with 1 to 3 radicals independently selected from halo, nitro, cyano, C1-6alkyl, C1-6alkoxy, C1-6alkylthio, hydroxy-C1-6alkyl, halo-substituted-C1-6alkyl, halo-substituted-C1-6alkoxy, C3-12cycloalkyl, C3-8heterocycloalkyl, C6-10aryl, C5-13heteroaryl and —XNR12R12; wherein R12 is selected from hydrogen and C1-6alkyl;
R6 is selected from hydrogen and methyl; and
R7 is selected from hydrogen, C1-6alkyl, C6-12aryl-C0-4alkyl, C3-12cycloalkyl-C0-4alkyl, —XOR14a and —XNR14aR14b; wherein X is a bond or C1-4alkylene; and R14a and R14b are independently selected from hydrogen and C1-6alkyl.
In another embodiment, R1 is selected from —CH2CR5R6CO2H, —OCR5R6CO2H, —SCR5R6CO2H, —CR5R6CH2CO2H and —CR5R6CO2H; wherein R5 and R6 are independently selected from hydrogen, methyl, methoxy and ethoxy; or R5 and R6 together with the carbon atom to which R5 and R6 are attached form cyclopentyl.
In another embodiment, each R2 is independently selected from methyl, ethyl, cyclopropyl, methoxy, furanyl, phenyl, pyridinyl, thienyl, pyrrolidinyl and benzo[1,3]dioxolyl; wherein said pyridinyl or phenyl of R2 is optionally substituted with 1 to 3 radicals independently selected from halo, methyl-carbonyl, dimethyl-amino, methoxy, halo-substituted-methoxy, methyl-thio, ethenyl, hexenyl and propyloxy.
In another embodiment, R7 is selected from hydrogen, methyl, isopropyl, propyl, pentyl, isobutyl, methoxy-ethyl, benzyl, phenethyl, cyclohexyl-methyl, cyclobutyl-methyl, cyclopropyl-methyl and diethyl-amino-ethyl.
Preferred compounds of Formula I are selected from: 2-Methyl-2-[2-methyl-4-(2-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-phenoxy]-propionic acid; 2-Methyl-2-(2-methyl-4-{2-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-ethoxy}-phenoxy)-propionic acid; 2-Methyl-2-[2-methyl-4-(2-{propyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-phenoxy]-propionic acid; 2-Methyl-2-[2-methyl-4-(2-{pentyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-phenoxy]-propionic acid; 2-[4-(2-{Isopropyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid; 2-[4-(2-{Isobutyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid; 2-[4-(2-{(2-Methoxy-ethyl)-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid; 2-[4-(2-{Benzyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid; 2-Methyl-2-[2-methyl-4-(2-{phenethyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-phenoxy]-propionic acid; 2-[4-(2-{Cyclohexylmethyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid; 2-[4-(2-{Cyclobutylmethyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]amino}-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid; 2-[4-(2-{Cyclopropylmethyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid; 2-[4-(2-{(2-Diethylamino-ethyl)-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid; 2-[2,5-Dimethyl-4-(2-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-phenoxy]-2-methyl-propionic acid; 2-(2,5-Dimethyl-4-{2-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-ethoxy}-phenoxy)-2-methyl-propionic acid; 2-[2,5-Dimethyl-4-(3-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-propoxy)-phenoxy]-2-methyl-propionic acid; 2-(2,5-Dimethyl-4-{3-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-propoxy}-phenoxy)-2-methyl-propionic acid; 2-[2,5-Dimethyl-4-(4-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-butoxy)-phenoxy]-2-methyl-propionic acid; 2-(2,5-Dimethyl-4-{4-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-butoxy}-phenoxy)-2-methyl-propionic acid; 2-(2,5-Dimethyl-4-{2-[4-(4-trifluoromethoxy-phenyl)-thiazol-2-ylamino]-ethoxy}-phenoxy)-2-methyl-propionic acid; 2-[2,5-Dimethyl-4-(2-{methyl-[4-(4-trifluoromethoxy-phenyl)-thiazol-2-yl]-amino}-ethoxy)-phenoxy]-2-methyl-propionic acid; 2-(4-{2-[4-(4-Methoxy-phenyl)-thiazol-2-ylamino]-ethoxy}-2,5-dimethyl-phenoxy)-2-methyl-propionic acid; 2-[4-(2-{[4-(4-Methoxy-phenyl)-thiazol-2-yl]-methyl-amino}-ethoxy)-2,5-dimethyl-phenoxy]-2-methyl-propionic acid; 2-(4-{2-[(4-Biphenyl-4-yl-thiazol-2-yl)-methyl-amino]-ethoxy}-2,5-dimethyl-phenoxy)-2-methyl-propionic acid; 2-(2,5-Dimethyl-4-{2-[4-(4-trifluoromethyl-phenyl)-oxazol-2-ylamino]-ethoxy}-phenoxy)-2-methyl-propionic acid; 2-[2,5-Dimethyl-4-(2-{methyl-[4-(4-trifluoromethyl-phenyl)-oxazol-2-yl]-amino}-ethoxy)-phenoxy]-2-methyl-propionic acid; 2-(2,5-Dimethyl-4-{3-[4-(4-trifluoromethoxy-phenyl)-thiazol-2-ylamino]-propoxy}-phenoxy)-2-methyl-propionic acid; 2-[2,5-Dimethyl-4-(3-{methyl-[4-(4-trifluoromethoxy-phenyl)-thiazol-2-yl]-amino}-propoxy)-phenoxy]-2-methyl-propionic acid; 2-(4-{3-[4-(4-Methoxy-phenyl)-thiazol-2-ylamino]-propoxy}-2,5-dimethyl-phenoxy)-2-methyl-propionic acid; 2-[4-(3-{[4-(4-Methoxy-phenyl)-thiazol-2-yl]-methyl-amino}-propoxy)-2,5-dimethyl-phenoxy]-2-methyl-propionic acid; 2-{4-[3-(4-Biphenyl-4-yl-thiazol-2-ylamino)-propoxy]-2,5-dimethyl-phenoxy}-2-methyl-propionic acid; 2-(4-{3-[(4-Biphenyl-4-yl-thiazol-2-yl)-methyl-amino]-propoxy}-2,5-dimethyl-phenoxy)-2-methyl-propionic acid; 2-(2,5-Dimethyl-4-{3-[4-(4-trifluoromethyl-phenyl)-oxazol-2-ylamino]-propoxy}-phenoxy)-2-methyl-propionic acid; 2-[2,5-Dimethyl-4-(3-{methyl-[4-(4-trifluoromethyl-phenyl)-oxazol-2-yl]-amino}-propoxy)-phenoxy]-2-methyl-propionic acid; 2-(2,5-Dimethyl-4-{2-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-ethylsulfanyl}-phenoxy)-2-methyl-propionic acid; 2-(2,5-Dimethyl-4-{3-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-propylsulfanyl}-phenoxy)-2-methyl-propionic acid; 2-[2,5-Dimethyl-4-(2-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethylsulfanyl)-phenoxy]-2-methyl-propionic acid; 2-[2,5-Dimethyl-4-(3-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-propylsulfanyl)-phenoxy]-2-methyl-propionic acid; 3-(2,5-Dimethyl-4-{2-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-ethoxy}-phenyl)-2,2-dimethyl-propionic acid; 3-(2,5-Dimethyl-4-{3-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-propoxy}-phenyl)-2,2-dimethyl-propionic acid; 3-[2,5-Dimethyl-4-(2-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-ethoxy)-phenyl]-2,2-dimethyl-propionic acid; 3-[2,5-Dimethyl-4-(3-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-amino}-propoxy)-phenyl]-2,2-dimethyl-propionic acid; 2-(2,5-Dimethyl-4-{2-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-ethoxy}-phenylsulfanyl)-2-methyl-propionic acid; 2-Methyl-2-(2-methyl-4-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-sulfamoyl}-phenoxy)-propionic acid; (2-Methyl-4-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-sulfamoyl}-phenoxy)-acetic acid; 2-(2,5-Dimethyl-4-{methyl-[4-(4-trifluoromethyl-phenyl)-thiazol-2-yl]-sulfamoyl}-phenoxy)-2-methyl-propionic acid; and 2-(2,5-Dimethyl-4-{[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-methyl}-phenoxy)-2-methyl-propionic acid.
Further preferred compounds of Formula I are detailed in the Examples, infra.
Compounds of the invention modulate the activity of PPARs and, as such, are useful for treating diseases or disorders in which PPARs contributes to the pathology and/or symptomology of the disease. This invention further provides compounds of this invention for use in the preparation of medicaments for the treatment of diseases or disorders in which PPARs contributes to the pathology and/or symptomology of the disease.
Such compounds may therefore be employed for the treatment of prophylaxis, dyslipidemia, hyperlipidemia, hypercholesteremia, atherosclerosis, atherogenesis, hypertriglyceridemia, heart failure, hyper cholesteremia, myocardial infarction, vascular diseases, cardiovascular diseases, hypertension, obesity, cachexia, HIV wasting syndrome, inflammation, arthritis, cancer, Alzheimer's disease, anorexia, anorexia nervosa, bulimia, skin disorders, respiratory diseases, ophthalmic disorders, IBDs (irritable bowel disease), ulcerative colitis and Crohn's disease. Preferably for the treatment of prophylaxis, dyslipidemia, hyperlipidemia, hypercholesteremia, atherosclerosis, atherogenesis, hypertriglyceridemia, cardiovascular diseases, hypertension, obesity, inflammation, cancer, skin disorders, IBDs (irritable bowel disease), ulcerative colitis and Crohn's disease.
Compounds of the invention can also be employed to treat long term critical illness, increase muscle mass and/or muscle strength, increase lean body mass, maintain muscle strength and function in the elderly, enhance muscle endurance and muscle function, and reverse or prevent frailty in the elderly.
Further, the compounds of the present invention may be employed in mammals as hypoglycemic agents for the treatment and prevention of conditions in which impaired glucose tolerance, hyperglycemia and insulin resistance are implicated, such as type-1 and type-2 diabetes, Impaired Glucose Metabolism (IGM), Impaired Glucose Tolerance (IGT), Impaired Fasting Glucose (IFG), and Syndrome X. Preferably type-1 and type-2 diabetes, Impaired Glucose Metabolism (IGM), Impaired Glucose Tolerance (IGT) and Impaired Fasting Glucose (IFG).
In accordance with the foregoing, the present invention further provides a method for preventing or treating any of the diseases or disorders described above in a subject in need of such treatment, which method comprises administering to said subject a therapeutically effective amount (See, “Administration and Pharmaceutical Compositions”, infra) of a compound of the invention or a pharmaceutically acceptable salt thereof. For any of the above uses, the required dosage will vary depending on the mode of administration, the particular condition to be treated and the effect desired. The present invention also concerns: i) a compound of the invention or a pharmaceutically acceptable salt thereof for use as a medicament; and ii) the use of a compound of the invention or a pharmaceutically acceptable salt thereof for the manufacture of a medicament for preventing or treating any of the diseases or disorders described above.
In general, compounds of the invention will be administered in therapeutically effective amounts via any of the usual and acceptable modes known in the art, either singly or in combination with one or more therapeutic agents. A therapeutically effective amount can vary widely depending on the severity of the disease, the age and relative health of the subject, the potency of the compound used and other factors. In general, satisfactory results are indicated to be obtained systemically at daily dosages of from about 0.03 to 2.5 mg/kg per body weight. An indicated daily dosage in the larger mammal, e.g. humans, is in the range from about 0.5 mg to about 100 mg, conveniently administered, e.g. in divided doses up to four times a day or in retard form. Suitable unit dosage forms for oral administration comprise from ca. 1 to 50 mg active ingredient.
Compounds of the invention can be administered as pharmaceutical compositions by any conventional route, in particular enterally, e.g., orally, e.g., in the form of tablets or capsules, or parenterally, e.g., in the form of injectable solutions or suspensions, topically, e.g., in the form of lotions, gels, ointments or creams, or in a nasal or suppository form. Pharmaceutical compositions comprising a compound of the present invention in free form or in a pharmaceutically acceptable salt form in association with at least one pharmaceutically acceptable carrier or diluent can be manufactured in a conventional manner by mixing, granulating or coating methods. For example, oral compositions can be tablets or gelatin capsules comprising the active ingredient together with a) diluents, e.g., lactose, dextrose, sucrose, mannitol, sorbitol, cellulose and/or glycine; b) lubricants, e.g., silica, talcum, stearic acid, its magnesium or calcium salt and/or polyethyleneglycol; for tablets also c) binders, e.g., magnesium aluminum silicate, starch paste, gelatin, tragacanth, methylcellulose, sodium carboxymethylcellulose and or polyvinylpyrollidone; if desired d) disintegrants, e.g., starches, agar, alginic acid or its sodium salt, or effervescent mixtures; and/or e) absorbents, colorants, flavors and sweeteners. Injectable compositions can be aqueous isotonic solutions or suspensions, and suppositories can be prepared from fatty emulsions or suspensions. The compositions can be sterilized and/or contain adjuvants, such as preserving, stabilizing, wetting or emulsifying agents, solution promoters, salts for regulating the osmotic pressure and/or buffers. In addition, they can also contain other therapeutically valuable substances. Suitable formulations for transdermal applications include an effective amount of a compound of the present invention with a carrier. A carrier can include absorbable pharmacologically acceptable solvents to assist passage through the skin of the host. For example, transdermal devices are in the form of a bandage comprising a backing member, a reservoir containing the compound optionally with carriers, optionally a rate controlling barrier to deliver the compound to the skin of the host at a controlled and predetermined rate over a prolonged period of time, and means to secure the device to the skin. Matrix transdermal formulations can also be used. Suitable formulations for topical application, e.g., to the skin and eyes, are preferably aqueous solutions, ointments, creams or gels well-known in the art. Such can contain solubilizers, stabilizers, tonicity enhancing agents, buffers and preservatives.
This invention also concerns a pharmaceutical composition comprising a therapeutically effective amount of a compound as described herein in combination with one or more pharmaceutically acceptable carriers.
Compounds of the invention can be administered in therapeutically effective amounts in combination with one or more therapeutic agents (pharmaceutical combinations).
Thus, the present invention also relates to pharmaceutical combinations, such as a combined preparation or pharmaceutical composition (fixed combination), comprising: 1) a compound of the invention as defined above or a pharmaceutical acceptable salt thereof; and 2) at least one active ingredient selected from:
a) anti-diabetic agents such as insulin, insulin derivatives and mimetics; insulin secretagogues such as the sulfonylureas, e.g., Glipizide, glyburide and Amaryl; insulinotropic sulfonylurea receptor ligands such as meglitinides, e.g., nateglinide and repaglinide; insulin sensitizer such as protein tyrosine phosphatase-1B (PTP-1B) inhibitors such as PTP-112; GSK3 (glycogen synthase kinase-3) inhibitors such as SB-517955, SB-4195052, SB-216763, N,N-57-05441 and N,N-57-05445; RXR ligands such as GW-0791 and AGN-194204; sodium-dependent glucose co-transporter inhibitors such as T-1095; glycogen phosphorylase A inhibitors such as BAY R3401; biguanides such as metformin; alpha-glucosidase inhibitors such as acarbose; GLP-1 (glucagon like peptide-1), GLP-1 analogs such as Exendin-4 and GLP-1 mimetics; DPPIV (dipeptidyl peptidase IV) inhibitors such as DPP728, LAF237 (vildagliptin—Example 1 of WO 00/34241), MK-0431, saxagliptin, GSK23A; an AGE breaker; a thiazolidone derivative (glitazone) such as pioglitazone, rosiglitazone, or (R)-1-{4-[5-methyl-2-(4-trifluoromethyl-phenyl)-oxazol-4-ylmethoxy]-benzenesulfonyl}-2,3-dihydro-1H-indole-2-carboxylic acid described in the patent application WO 03/043985, as compound 19 of Example 4, a non-glitazone type PPARγ agonist e.g. GI-262570;
b) hypolipidemic agents such as 3-hydroxy-3-methyl-glutaryl coenzyme A (HMG-CoA) reductase inhibitors, e.g., lovastatin, pitavastatin, simvastatin, pravastatin, cerivastatin, mevastatin, velostatin, fluvastatin, dalvastatin, atorvastatin, rosuvastatin and rivastatin; squalene synthase inhibitors; FXR (farnesoid X receptor) and LXR (liver X receptor) ligands; cholestyramine; fibrates; nicotinic acid and aspirin;
c) an anti-obesity agent or appetite regulating agent such as phentermine, leptin, bromocriptine, dexamphetamine, amphetamine, fenfluramine, dexfenfluramine, sibutramine, orlistat, dexfenfluramine, mazindol, phentermine, phendimetrazine, diethylpropion, fluoxetine, bupropion, topiramate, diethylpropion, benzphetamine, phenylpropanolamine or ecopipam, ephedrine, pseudoephedrine or cannabinoid receptor antagonists;
d) anti-hypertensive agents, e.g., loop diuretics such as ethacrynic acid, furosemide and torsemide; diuretics such as thiazide derivatives, chlorithiazide, hydrochlorothiazide, amiloride; angiotensin converting enzyme (ACE) inhibitors such as benazepril, captopril, enalapril, fosinopril, lisinopril, moexipril, perinodopril, quinapril, ramipril and trandolapril; inhibitors of the Na—K-ATPase membrane pump such as digoxin; neutralendopeptidase (NEP) inhibitors e.g. thiorphan, terteo-thiorphan, SQ29072; ECE inhibitors e.g. SLV306; ACE/NEP inhibitors such as omapatrilat, sampatrilat and fasidotril; angiotensin II antagonists such as candesartan, eprosartan, irbesartan, losartan, telmisartan and valsartan, in particular valsartan; renin inhibitors such as aliskiren, terlakiren, ditekiren, RO 66-1132, RO-66-1168; P-adrenergic receptor blockers such as acebutolol, atenolol, betaxolol, bisoprolol, metoprolol, nadolol, propranolol, sotalol and timolol; inotropic agents such as digoxin, dobutamine and milrinone; calcium channel blockers such as amlodipine, bepridil, diltiazem, felodipine, nicardipine, nimodipine, nifedipine, nisoldipine and verapamil; aldosterone receptor antagonists; and aldosterone synthase inhibitors;
e) a HDL increasing compound;
f) Cholesterol absorption modulator such as Zetia® and KT6-971;
g) Apo-A1 analogues and mimetics;
h) thrombin inhibitors such as Ximelagatran;
i) aldosterone inhibitors such as anastrazole, fadrazole, eplerenone;
j) Inhibitors of platelet aggregation such as aspirin, clopidogrel bisulfate;
k) estrogen, testosterone, a selective estrogen receptor modulator, a selective androgen receptor modulator;
l) a chemotherapeutic agent such as aromatase inhibitors e.g. femara, anti-estrogens, topoisomerase I inhibitors, topoisomerase II inhibitors, microtubule active agents, alkylating agents, antineoplastic antimetabolites, platin compounds, compounds decreasing the protein kinase activity such as a PDGF receptor tyrosine kinase inhibitor preferably Imatinib ({N-{5-[4-(4-methyl-piperazino-methyl)-benzoylamido]-2-methylphenyl}-4-(3-pyridyl)-2-pyrimidine-amine}) described in the European patent application EP-A-0 564 409 as example 21 or 4-Methyl-N-[3-(4-methyl-imidazol-1-yl)-5-trifluoromethyl-phenyl]-3-(4-pyridin-3-yl-pyrimidin-2-ylamino)-benzamide described in the patent application WO 04/005281 as example 92; and
m) an agent interacting with a 5-HT3 receptor and/or an agent interacting with 5-HT4 receptor such as tegaserod described in the U.S. Pat. No. 5,510,353 as example 13, tegaserod hydrogen maleate, cisapride, cilansetron;
or, in each case a pharmaceutically acceptable salt thereof; and optionally a pharmaceutically acceptable carrier.
Most preferred combination partners are tegaserod, imatinib, vildagliptin, metformin, a thiazolidone derivative (glitazone) such as pioglitazone, rosiglitazone, or (R)-1-{4-[5-methyl-2-(4-trifluoromethyl-phenyl)-oxazol-4-ylmethoxy]-benzenesulfonyl}-2,3-dihydro-1H-indole-2-carboxylic acid, a sulfonylurea receptor ligand, aliskiren, valsartan, orlistat or a statin such as pitavastatin, simvastatin, fluvastatin or pravastatin.
Preferably the pharmaceutical combinations contains a therapeutically effective amount of a compound of the invention as defined above, in a combination with a therapeutically effective amount of another therapeutic agent as described above, e.g., each at an effective therapeutic dose as reported in the art. Combination partners (1) and (2) can be administered together, one after the other or separately in one combined unit dosage form or in two separate unit dosage forms. The unit dosage form may also be a fixed combination.
The structure of the active agents identified by generic or trade names may be taken from the actual edition of the standard compendium “The Merck Index” or the Physician's Desk Reference or from databases, e.g. Patents International (e.g. IMS World Publications) or Current Drugs. The corresponding content thereof is hereby incorporated by reference. Any person skilled in the art is fully enabled to identify the active agents and, based on these references, likewise enabled to manufacture and test the pharmaceutical indications and properties in standard test models, both in vitro and in vivo.
In another preferred aspect the invention concerns a pharmaceutical composition (fixed combination) comprising a therapeutically effective amount of a compound as described herein, in combination with a therapeutically effective amount of at least one active ingredient selected from the above described group a) to m), or, in each case a pharmaceutically acceptable salt thereof.
A pharmaceutical composition or combination as described herein for the manufacture of a medicament for the treatment of for the treatment of dyslipidemia, hyperlipidemia, hypercholesteremia, atherosclerosis, hypertriglyceridemia, heart failure, myocardial infarction, vascular diseases, cardiovascular diseases, hypertension, obesity, inflammation, arthritis, cancer, Alzheimer's disease, skin disorders, respiratory diseases, ophthalmic disorders, inflammatory bowel diseases, IBDs (irritable bowel disease), ulcerative colitis, Crohn's disease, conditions in which impaired glucose tolerance, hyperglycemia and insulin resistance are implicated, such as type-1 and type-2 diabetes, Impaired Glucose Metabolism (IGM), Impaired Glucose Tolerance (IGT), Impaired Fasting Glucose (IFG), and Syndronie-X.
Such therapeutic agents include estrogen, testosterone, a selective estrogen receptor modulator, a selective androgen receptor modulator, insulin, insulin derivatives and mimetics; insulin secretagogues such as the sulfonylureas, e.g., Glipizide and Amaryl; insulinotropic sulfonylurea receptor ligands, such as meglitinides, e.g., nateglinide and repaglinide; insulin sensitizers, such as protein tyrosine phosphatase-1B (PTP-1B) inhibitors, GSK3 (glycogen synthase kinase-3) inhibitors or RXR ligands; biguanides, such as metformin; alpha-glucosidase inhibitors, such as acarbose; GLP-1 (glucagon like peptide-1), GLP-1 analogs, such as Exendin-4, and GLP-1 mimetics; DPPIV (dipeptidyl peptidase IV) inhibitors, e.g. isoleucin-thiazolidide; DPP728 and LAF237, hypolipidemic agents, such as 3-hydroxy-3-methyl-glutaryl coenzyme A (HMG-CoA) reductase inhibitors, e.g., lovastatin, pitavastatin, simvastatin, pravastatin, cerivastatin, mevastatin, velostatin, fluvastatin, dalvastatin, atorvastatin, rosuvastatin, fluindostatin and rivastatin, squalene synthase inhibitors or FXR (liver X receptor) and LXR (farnesoid X receptor) ligands, cholestyramine, fibrates, nicotinic acid and aspirin. A compound of the present invention may be administered either simultaneously, before or after the other active ingredient, either separately by the same or different route of administration or together in the same pharmaceutical formulation.
The invention also provides for pharmaceutical combinations, e.g. a kit, comprising: a) a first agent which is a compound of the invention as disclosed herein, in free form or in pharmaceutically acceptable salt form, and b) at least one co-agent. The kit can comprise instructions for its administration.
The terms “co-administration” or “combined administration” or the like as utilized herein are meant to encompass administration of the selected therapeutic agents to a single patient, and are intended to include treatment regimens in which the agents are not necessarily administered by the same route of administration or at the same time. The term “pharmaceutical combination” as used herein means a product that results from the mixing or combining of more than one active ingredient and includes both fixed and non-fixed combinations of the active ingredients. The term “fixed combination” means that the active ingredients, e.g. a compound of Formula I and a co-agent, are both administered to a patient simultaneously in the form of a single entity or dosage. The term “non-fixed combination” means that the active ingredients, e.g. a compound of Formula I and a co-agent, are both administered to a patient as separate entities either simultaneously, concurrently or sequentially with no specific time limits, wherein such administration provides therapeutically effective levels of the 2 compounds in the body of the patient. The latter also applies to cocktail therapy, e.g. the administration of 3 or more active ingredients.
The present invention also includes processes for the preparation of compounds of the invention. In the reactions described, it can be necessary to protect reactive functional groups, for example hydroxy, amino, imino, thio or carboxy groups, where these are desired in the final product, to avoid their unwanted participation in the reactions. Conventional protecting groups can be used in accordance with standard practice, for example, see T. W. Greene and P. G. M. Wuts in “Protective Groups in Organic Chemistry”, John Wiley and Sons, 1991.
Compounds of Formula I, in which R1 is defined by —X1 CR9R10X2CO2R11 (shown below), —X1SCR9R10X2CO2R11 and —X1OCR9R10X2CO2R11, wherein R7 is an alkyl group e.g., methyl or ethyl for a compound of formula 4 converting to hydrogen in formula I, can be prepared by proceeding as in reaction scheme 1:
in which n, p, R1, R2, R3, R4, R5, R6, R7, R9, R10, X1, X2, Y, Z and W are as defined for Formula I. Compounds of Formula I are prepared by reacting a compound of formula 4 in the presence of a suitable base (e.g., lithium hydroxide, or the like) and a suitable solvent (e.g., THF, water or the like). The reaction is carried out in the temperature range of about 0° C. to about 50° C. and takes up to about 30 hours to complete.
Compounds of Formula II can be prepared by proceeding as in reaction scheme 2:
in which n, p, R1, R2, R3, R4, Y and Z are as defined for Formula I in the Summary of the Invention; and Q is a halogen, preferably Cl, I or Br. Compounds of formula 11 are formed by reacting a compound of formula 5 with a compound of formula 9. The reaction proceeds in the presence of a suitable solvent (for example, acetonitrile, acetone, and the like), a suitable inorganic base (for example, Cs2CO3, K2CO3, and the like). The reaction is carried out in the temperature range of about 10 to about 100° C. and takes up to about 24 hours to complete.
Compounds of Formula 14 can be prepared by proceeding as in reaction scheme 3:
in which R5, R6 and W are as defined for Formula I in the Summary of the Invention; and Q is a halogen, preferably Cl, I or Br. Compounds of formula 14 are formed by reacting a compound of formula 12 with a compound of formula 13 in the presence of a suitable solvent (for example, acetone, and the like). The reaction is carried out in the temperature range of about 50 to about 80° C. and takes up to about 6 hours to complete.
Compounds of Formula I, where R7 is hydrogen, can be prepared by proceeding as in reaction scheme 4:
in which n, p, R1, R2, R3, R4, R5, R6, Y and W are as defined for Formula I. Compounds of Formula I are prepared by reacting a compound of 11 with a compound of formula 14 in the presence of a suitable solvent (for example, acetonitrile, and the like) and a suitable inorganic base (for example, K2CO3, and the like). The reaction is carried out in the temperature range of about 60 to about 120° C. and takes up to about 24 hours to complete.
Compounds of Formula I can be prepared by proceeding as in reaction scheme 5:
in which n, p, R1, R2, R3, R4, R5, R6, R7, Y and W are as defined for Formula I; and Q is a halogen, preferably Cl, I or Br. Compounds of Formula I are prepared by reacting a compound of formula I (where R7 is hydrogen) with a compound of formula 15 in the presence of a suitable solvent (for example, acetonitrile, and the like) and a suitable inorganic base (for example, Cs2CO3, and the like). The reaction is carried out in the temperature range of about 60 to about 120° C. and takes up to about 24 hours to complete.
Compounds of Formula 17, where R7 is hydrogen, can be prepared by proceeding as in reaction scheme 6:
in which n, p, R1, R2, R5, R6 and W are as defined for Formula I. Compounds of Formula 17 are prepared by reacting a compound of 16 with a compound of formula 14 in the presence of a suitable solvent (for example, DCM, and the like) and a suitable inorganic base (for example, K2CO3, and the like) or organic base (for example, triethylamine, and the like). The reaction is carried out in the temperature range of about 0 to about 50° C. and takes up to about 24 hours to complete.
Compounds of Formula I can be prepared by proceeding as in reaction scheme 7:
in which n, p, R1, R2, R3, R4, R5, R6, R7, Y and W are as defined for Formula I. Compounds of Formula I are prepared by reacting a compound of 18 with a compound of formula 14 in the presence of a suitable solvent (for example, THF, and the like) and a suitable dehydrating agent (for example, triethylorthoacetate, and the like) and a suitable reducing agent (for example, sodium triacetoxyborohydride, and the like). The reaction is carried out in the temperature range of about 0 to about 50° C. and takes up to about 24 hours to complete.
Detailed reaction conditions are described in the examples, infra.
A compound of the invention can be prepared as a pharmaceutically acceptable acid addition salt by reacting the free base form of the compound with a pharmaceutically acceptable inorganic or organic acid. Alternatively, a pharmaceutically acceptable base addition salt of a compound of the invention can be prepared by reacting the free acid form of the compound with a pharmaceutically acceptable inorganic or organic base. Alternatively, the salt forms of the compounds of the invention can be prepared using salts of the starting materials or intermediates.
The free acid or free base forms of the compounds of the invention can be prepared from the corresponding base addition salt or acid addition salt from, respectively. For example a compound of the invention in an acid addition salt form can be converted to the corresponding free base by treating with a suitable base (e.g., ammonium hydroxide solution, sodium hydroxide, and the like). A compound of the invention in a base addition salt form can be converted to the corresponding free acid by treating with a suitable acid (e.g., hydrochloric acid, etc.).
Compounds of the invention in unoxidized form can be prepared from N-oxides of compounds of the invention by treating with a reducing agent (e.g., sulfur, sulfur dioxide, triphenyl phosphine, lithium borohydride, sodium borohydride, phosphorus trichloride, tribromide, or the like) in a suitable inert organic solvent (e.g. acetonitrile, ethanol, aqueous dioxane, or the like) at 0 to 80° C.
Prodrug derivatives of the compounds of the invention can be prepared by methods known to those of ordinary skill in the art (e.g., for further details see Saulnier et al., (1994), Bioorganic and Medicinal Chemistry Letters, Vol. 4, p. 1985). For example, appropriate prodrugs can be prepared by reacting a non-derivatized compound of the invention with a suitable carbamylating agent (e.g., 1,1-acyloxyalkylcarbanochloridate, para-nitrophenyl carbonate, or the like).
Protected derivatives of the compounds of the invention can be made by means known to those of ordinary skill in the art. A detailed description of techniques applicable to the creation of protecting groups and their removal can be found in T. W. Greene, “Protecting Groups in Organic Chemistry”, 3rd edition, John Wiley and Sons, Inc., 1999.
Compounds of the present invention can be conveniently prepared, or formed during the process of the invention, as solvates (e.g., hydrates). Hydrates of compounds of the present invention can be conveniently prepared by recrystallization from an aqueous/organic solvent mixture, using organic solvents such as dioxin, tetrahydrofuran or methanol.
Compounds of the invention can be prepared as their individual stereoisomers by reacting a racemic mixture of the compound with an optically active resolving agent to form a pair of diastereoisomeric compounds, separating the diastereomers and recovering the optically pure enantiomers. While resolution of enantiomers can be carried out using covalent diastereomeric derivatives of the compounds of the invention, dissociable complexes are preferred (e.g., crystalline diastereomeric salts). Diastereomers have distinct physical properties (e.g., melting points, boiling points, solubilities, reactivity, etc.) and can be readily separated by taking advantage of these dissimilarities. The diastereomers can be separated by chromatography, or preferably, by separation/resolution techniques based upon differences in solubility. The optically pure enantiomer is then recovered, along with the resolving agent, by any practical means that would not result in racemization. A more detailed description of the techniques applicable to the resolution of stereoisomers of compounds from their racemic mixture can be found in Jean Jacques, Andre Collet, Samuel H. Wilen, “Enantiomers, Racemates and Resolutions”, John Wiley And Sons, Inc., 1981.
In summary, the compounds of Formula I can be made by a process, which involves:
(a) that of reaction schemes 1 through 7; and
(b) optionally converting a compound of the invention into a pharmaceutically acceptable salt;
(c) optionally converting a salt form of a compound of the invention to a non-salt form;
(d) optionally converting an unoxidized form of a compound of the invention into a pharmaceutically acceptable N-oxide;
(e) optionally converting an N-oxide form of a compound of the invention to its unoxidized form;
(f) optionally resolving an individual isomer of a compound of the invention from a mixture of isomers;
(g) optionally converting a non-derivatized compound of the invention into a pharmaceutically acceptable prodrug derivative; and
(h) optionally converting a prodrug derivative of a compound of the invention to its non-derivatized form.
Insofar as the production of the starting materials is not particularly described, the compounds are known or can be prepared analogously to methods known in the art or as disclosed in the Examples hereinafter.
One of skill in the art will appreciate that the above transformations are only representative of methods for preparation of the compounds of the present invention, and that other well known methods can similarly be used.
The present invention is further exemplified, but not limited, by the following intermediates and examples that illustrate the preparation of compounds of Formula I according to the invention.
2-Bromo-1-(4-trifluoromethyl-phenyl)-ethanone (10 g, 37.4 mmol) and thiourea (2.85 g, 37.4 mmol) are dissolved in dry acetone (100 mL) and heated at reflux for 2 h. The solution is cooled and stirred at rt for 2 h, then filtered and washed with acetone to give 4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamine 1 (9.35 g, 100%) as white crystals. 1H-NMR (400 MHz, DMSO-d6) δ=8.30 (br. s, 2H), 7.98 (d, J=8.0 Hz, 2H), 7.84 (d, J=8.0 Hz, 2H), 7.42 (s, 1H). MS calcd. for C10H8F3N2S (M+H+) 245.0, found 245.1.
Following the procedure for Intermediate 1, except substituting 2-bromo-1-(4-(trifluoromethoxy)phenyl)ethanone for 2-bromo-1-(4-trifluoromethyl-phenyl)-ethanone, the title compound is prepared as a white solid: 1H-NMR (400 MHz, DMSO-d6) δ=7.88 (d, J=8.8 Hz, 2H), 7.44 (d, J=8.4 Hz, 2H), 7.21 (s, 1H). MS calculated for C10H8F3N2OS (M+H+) 261.0, found 261.0.
Following the procedure for Intermediate 1, except substituting 2-bromo-1-(4-methoxyphenyl)ethanone for 2-bromo-1-(4-trifluoromethyl-phenyl)-ethanone, the title compound is prepared as a white solid: 1H-NMR (400 MHz, DMSO-d6) δ=7.67 (d, J=8.8 Hz, 2H), 7.06 (s, 1H), 7.05 (d, J=8.8 Hz, 2H), 3.81 (s, 3H). MS calculated for C10H11N2OS (M+H+) 207.0, found 207.0.
Following the procedure for Intermediate 1, except substituting 2-bromo-1-(4-biphenyl)ethanone for 2-bromo-1-(4-trifluoromethyl-phenyl)-ethanone, the title compound is prepared as a white solid: 1H-NMR (400 MHz, DMSO-d6) δ=7.84 (d, J=8.8 Hz, 2H), 7.79 (d, J=8.8 Hz, 2H), 7.73 (d, J=8.8 Hz, 2H), 7.50 (t, J=7.6 Hz, 2H), 7.40 (t, J=7.6 Hz, 1H), 7.28 (s, 1H). MS calculated for C15H13N2S (M+H+), 253.1, found 253.0.
Following the procedure for Intermediate 1, except substituting urea for thiourea, the title compound is prepared as a white solid: 1H-NMR (400 MHz, DMSO-d6) δ=8.07 (s, 1H), 7.84 (d, J=8.4 Hz, 2H), 7.72 (d, J=8.4 Hz, 2H), 6.85 (s, 2H). MS calculated for C15H13N2S (M+H+) 229.1, found 229.0.
Step A: 4-Benzyloxy-phenol (32.04 g, 160.2 mmol) is dissolved in 550 mL of dichloromethane and 20 mL methanol. Powdered calcium carbonate (21.83 g, 218.1 mmol, 1.36 equiv.) is suspended in the solution. While the suspension is vigorously stirred, a solution of bromine (8.30 mL, 161.5 mmol, 1.01 equiv.) in 50 mL dichloromethane is added dropwise. After the addition is completed, the suspension is stirred at room temperature for 30 min, then the solids are filtered off. The filtrate is dried over solid NaHCO3 and MgSO4, then filtered and concentrated to yield an oil. Precipitation of unreacted 4-benzyloxy-phenol using diethyl ether/petroleum ether at −20° C. yielded 4-benzyloxy-2-bromo-phenol 10 as a colorless oil that slowly solidified (43.65 g, 156.4 mmol, 97.6%). 1H-NMR (400 MHz, CDCl3) δ=7.38 (m, 5H), 7.10 (d, J=2.8 Hz, 1H), 6.94 (d, J=8.9 Hz, 1H), 6.87 (dd, J=8.9, 2.8 Hz, 1H), 4.99 (s, 2H).
Step B: 4-Benzyloxy-2-bromo-phenol 10 (43.6 g, 156.3 mmol) is dissolved in 400 mL dichloromethane. Imidazole (14.9 g, 218.9 mmol, 1.4 equiv.) is added; the mixture is stirred at room temperature until homogenous. tert-Butyl dimethylchlorosilane (23.6 g, 156.6 mmol, 1.0 equiv.) is added; the cloudy mixture is stirred at room temperature for 18 h. Washing with water, drying over MgSO4 and concentration yielded (4-benzyloxy-2-bromo-phenoxy)-tert-butyl-dimethyl-silane 11 as an oil (60.91 g, 154.8 mmol, 99%). 1H-NMR (400 MHz, CDCl3) δ=7.40 (m, 5H), 7.10 (s, 1H), 6.79 (s, 2H), 4.98 (s, 2H), 1.03 (s, 9H), 0.22 (s, 6H).
Step C: (4-Benzyloxy-2-bromo-phenoxy)-tert-butyl-dimethyl-silane 11 (10.05 g, 25.6 mmol) is dissolved in 45 mL dimethylformamide. The mixture is degassed using argon. Dichloro bis(triphenylphosphino)palladium(II) (3.49 g, 4.97 mmol, 0.19 equiv.) is added, followed by tetramethyltin (5.0 mL, 36.3 mmol, 1.42 equiv.). The mixture is heated to 100° C. for 3 h, after which it became homogenous. Cooling, concentration, and silica gel chromatography purification (0-50% gradient, ethyl acetate in hexanes) yielded (4-benzyloxy-2-methyl-phenoxy)-tert-butyl-dimethyl-silane 12 as an oil that solidifies into a white solid (5.03 g, 15.3 mmol, 60%). 1H-NMR (400 MHz, CDCl3) δ=7.42 (m, 2H), 7.37 (m, 2H), 7.31 (m, 1H), 6.79 (d, J=2.2 Hz, 1H), 6.67 (m, 2H), 4.99 (s, 2H), 2.18 (s, 3H), 1.01 (s, 9H), 0.18 (s, 6H). MS calcd. for C20H29O2Si (M+H+) 329.2, found 329.2.
Step D: (4-Benzyloxy-2-methyl-phenoxy)-tert-butyl-dimethyl-silane 12 (5.03 g, 15.3 mmol) is dissolved in 30 mL THF. A 1.0 M solution of tetra-(n-butyl)ammonium fluoride in THF (18 mL, 18 mmol, 1.5 equiv.) is added; the mixture is stirred at room temperature for 4 h. Concentration to dryness and purification by silica gel chromatography (10-30% gradient, ethyl acetate in hexanes) yielded 4-benzyloxy-2-methyl-phenol 13 (3.06 g, 14.3 mmol, 93%). 1H-NMR (400 MHz, CDCl3) δ=7.42 (m, 4H), 7.31 (m, 1H), 6.78 (s, 1H), 6.69 (s, 2H), 4.99 (s, 2H), 2.27 (s, 3H).
Step E: 4-benzyloxy-2-methyl-phenol 13 (3.06 g, 14.3 mmol) is dissolved in 60 mL acetonitrile. Powdered cesium carbonate (8.71 g, 26.7 mmol, 1.78 equiv.) is added to the vigorously stirring solution. 2-Bromo-2-methyl-propionic acid methyl ester (2.20 mL, 17.0 mmol, 1.13 equiv.) is added and the mixture is stirred at 60° C. for 6 h. Filtration and concentration yielded 2-(4-benzyloxy-2-methyl-phenoxy)-2-methyl-propionic acid methyl ester 14 as an oil (5.11 g, quantitative). The crude product is used as such in the next step. 1H-NMR (400 MHz, CDCl3) δ=7.37 (m, 5H), 6.80 (d, J=2.4 Hz, 1H), 6.65 (d, J=2.8 Hz, 1H), 6.64 (s, 1H), 4.98 (s, 2H), 3.80 (s, 3H), 2.21 (s, 3H), 1.54 (s, 6H). MS calcd. for C19H22NaO4 (M+Na+) 337.2, found 337.2.
Step F: 2-(4-Benzyloxy-2-methyl-phenoxy)-2-methyl-propionic acid methyl ester 14 from Step E above is dissolved in 120 mL ethanol. The solution is degassed using nitrogen, then treated with 5% palladium black on carbon (1.50 g, 0.70 mmol, 4 mol %). The solution is shaken under 60 psi hydrogen for 15 h. Filtration and concentration yielded an oil; silica gel chromatography (hexanes to 60% ethyl acetate in hexanes) yields 2-(4-hydroxy-2-methyl-phenoxy)-2-methyl-propionic acid methyl ester 15 as an oil (3.42 g, 15.3 mmol, quantitative). 1H-NMR (400 MHz, CDCl3) δ=6.64 (d, J=3.0 Hz, 1H), 6.59 (d, J=8.7 Hz, 1H), 6.51 (dd, J=8.7, 3.1 Hz, 1H), 4.62 (s, 1H), 3.80 (s, 3H), 2.19 (s, 3H), 1.53 (s, 6H). MS calcd. for C12H16NaO4 (M+Na+) 247.1, found 247.1.
Step G: Intermediate 15 (1.0 g, 4.5 mmol), 1,2-dibromoethane (3.8 mL, 44.6 mmol) and Cs2CO3 (7.3 g, 22.3 mmol) are suspended in dry acetonitrile (25 mL). The mixture is heated to 80° C. overnight. The reaction mixture is cooled to room temperature, filtered and the solvent is removed in vacuo. The remainder is purified by flash chromatography (silica, DCM/MeOH gradient) to afford 2-[4-(2-bromo-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid methyl ester 16 (0.7 g, 47%) as a colourless oil: MS calculated for C14H20BrO4 (M+H+) 331.1, found 331.0.
Step A: 2,5-Dimethylquinone (5.41 g, 39.7 mmol) is suspended in diethyl ether (70 mL). Water (100 mL) is added, followed by solid sodium dithionite (20.30 g, 116.6 mmol). The resulting mixture is shaken vigorously. The initially yellow suspension slowly turned deep red, then colorless. Separation of the organic layer, followed by washing with water and brine, drying over Na2SO4 and concentration yielded 2,5-dimethylhydroquinone 17 as a white solid (4.37 g, 31.6 mmol, 80%). 1H-NMR (400 MHz, DMSO-d6) δ=8.32 (s, 2H), 6.45 (s, 2H), 1.99 (s, 6H).
Step B: 2,5-Dimethylhydroquinone 17 (3.73 g, 27 mmol) is dissolved in dimethylformamide (20 mL) and acetonitrile (60 mL). Powdered cesium carbonate (9.16 g, 28.1 g, 1.04 equiv.) is added to the vigorously stirring solution, followed by 2-bromo-2-methyl-propionic acid methyl ester (3.50 mL, 27.0 mmol, 1 equiv.). The mixture is stirred at 75° C. for 18 h. Filtration and concentration, followed by purification by silica gel chromatography (5-30% gradient, ethyl acetate in hexanes) yielded 2-(4-hydroxy-2,5-dimethyl-phenoxy)-2-methyl-propionic acid methyl ester 18 as and oil (1.92 g, 8.06 mmol, 30%). The chromatography also yielded recovered hydroquinone 17 (1.20 g, 8.68 mmol, 32%). 18: 1H-NMR (400 MHz, CDCl3) δ=6.57 (s, 1H), 6.50 (s, 1H), 4.44 (s, 1H), 2.15 (s, 3H), 2.14 (s, 3H), 1.52 (s, 6H). MS calcd. for C13H18NaO4 (M+Na+) 261.1, found 261.1.
Step C: Intermediate 18 (0.25 g, 1.05 mmol), 1,2-dibromoethane (0.90 mL, 10.5 mmol) and Cs2CO3 (1.7 g, 5.25 mmol) are suspended in dry acetonitrile (7 mL). The mixture is heated to 80° C. overnight. The reaction mixture is cooled to room temperature, filtered and the solvent is removed in vacuo. The remainder is purified by flash chromatography (silica, DCM/MeOH gradient) to afford 2-[4-(2-bromo-ethoxy)-2-methyl-phenoxy]-2-methyl-propionic acid methyl ester 19 (0.24 g, 66%) as a colourless oil: 1H-NMR (400 MHz, CDCl3) δ=6.59 (s, 1H), 6.52 (s, 1H), 4.22 (t, J=6.2 Hz, 2H), 3.80 (s, 3H), 3.62 (t, J=6.2 Hz, 2H), 2.18 (s, 3H), 2.15 (s, 3H), 1.53 (s, 6H). MS calculated for C15H22BrO4 (M+H) 345.1, found 345.0.
Following the procedure for Intermediate 19, except substituting 1,3-dibromopropane for 1,2-dibromoethane, the title compound is prepared as a clear oil: 1H-NMR (400 MHz, CDCl3) δ=6.49 (s, 1H), 6.40 (s, 1H), 3.90 (t, J=5.7 Hz, 2H), 3.68 (s, 3H), 3.49 (t, J=6.5 Hz, 2H), 2.18 (m, 2H), 2.07 (s, 3H), 1.99 (s, 3H), 1.40 (s, 6H). MS calculated for C16H24BrO4 (M+H+) 359.1, found 359.0.
Following the procedure for Intermediate 19, except substituting 1,4-dibromobutane for 1,2-dibromoethane, the title compound is prepared as a clear oil: 1H-NMR (400 MHz, CDCl3) δ=6.55 (s, 1H), 6.49 (s, 1H), 3.90 (t, J=6.0 Hz, 2H), 3.78 (s, 3H), 3.47 (t, J=6.6 Hz, 2H), 2.16 (s, 3H), 2.09 (s, 3H), 2.05 (m, 2H), 1.90 (m, 2H), 1.49 (s, 6H). MS calculated for C17H26BrO4 (M+H+) 373.1, found 373.0.
Intermediate 23: (4-Chlorosulfonyl-2-methyl-phenoxy)-acetic acid methyl ester.
Step A: o-Cresol (10.0 g, 0.092 mmol) is dissolved in dry DMF (100 mL). Bromoacetic acid methyl ester (15.0 g, 0.098 mmol) and cesium carbonate (40.0 g, 0.123 mmol) are added. The reaction is kept stirring at rt for 3 h. Water is added and the reaction is extracted three times with ethyl acetate. The organic phase is washed with brine and dried with MgSO4. The solvent is evaporated to give crude product 22. MS calcd. for C10H13O3 (M+H+) 181.08, found 181.10.
Step B: A round bottom flask is charged with o-tolyloxy-acetic acid methyl ester 22 (5.0 g, 27.8 mmol). Chlorosulfonic acid (13.05 g, 112.0 mmol) is added at rt over 5 min. The reaction mixture is poured onto ice, stirred for another 5 min. Then it is filtered, the residue dissolved in DCM and washed with water three times. The organic phase is washed with sat. NaHCO3 and brine and dried by MgSO4. The solvent is evaporated. The crude product is purified by silica gel chromatography (ethyl acetate/hexane: 0-30%) to give 23 (4.8 g, 15.6 mmol, yield 78%) as a white solid: 1H-NMR (400 MHz, CDCl3) δ=7.78 (m, 2H), 6.72 (d, J=9.2 Hz, 1H), 4.71 (s, 2H), 3.76 (s, 3H), 2.30 (s, 3H). MS calcd. for C10H11O5S (M−Cl+) 243.0, found 243.0.
Following the procedure for Intermediate 23, except substituting 2-bromo-2-methyl-propionic acid methyl ester for bromoacetic acid methyl ester, the title compound is prepared as a white solid: 1H-NMR (400 MHz, CDCl3) δ=7.82 (d, J=1.6 Hz, 1H), 7.77 (dd, J=2.8 Hz, 8.8 Hz, 1H), 6.64 (d, J=8.8 Hz, 1H), 3.77 (s, 3H), 2.31 (s, 3H), 1.70 (s, 6H). MS calcd. for C12H16ClO5S (M+H+) 307.03, found 307.00.
Following the procedure for Intermediate 23, except using 2-bromo-2-methyl-propionic acid methyl ester and 2,5-dimethylphenol, the title compound is prepared as a white solid: 1H-NMR (400 MHz, CDCl3) δ=7.51 (s, 1H), 6.31 (s, 1H), 3.71 (s, 3H), 2.40 (s, 3H), 2.10 (s, 3H), 1.51 (s, 6H). MS calcd. for C13H18ClO55S (M+H+) 320.0, found 320.0.
Step A: 2,5-Dimethylphenol (10.04 g, 82.2 mmol) is dissolved in methanol (40 mL). Sodium thiocyanate (15.87 g, 195.8 mmol) and sodium bromide (7.37 g, 71.6 mmol) are added and the mixture is stirred at 0° C. Bromine (4.50 mL, 87.6 mmol) dissolved in methanol (40 mL) is added dropwise while stirring vigorously. Upon the completion of the addition, the mixture is stirred at 50° C. for 1 h. The mixture is cooled and concentrated. The residue is taken up in ethyl acetate and filtered. The filtrate is washed with saturated aqueous NaHCO3, water, and brine, dried over Na2SO4 and concentrated to afford 2,5-dimethyl-4-thiocyanato-phenol 30 (11.54 g, 78%) as an oil that solidified upon drying under high vacuum: 1H-NMR (400 MHz, CDCl3) δ=7.38 (s, 1H), 6.73 (s, 1H), 5.22 (s, 1H), 2.45 (s, 3H), 2.21 (s, 3H).
Step B: 2,5-Dimethyl-4-thiocyanato-phenol 30 (5.75 g, 32.1 mmol) is dissolved in acetonitrile (25 mL). Powdered cesium carbonate (15.32 g, 47.0 mmol) is added. Then 2-bromo-2-methyl-propionic acid methyl ester (4.50 mL, 34.8 mmol) is added and the mixture is stirred at 60° C. for 18 h. Filtration and concentration, followed by silica gel chromatography (0-50% ethyl acetate in hexanes) yielded 2-(2,5-dimethyl-4-thiocyanato-phenoxy)-2-methyl-propionic acid methyl ester 31 (3.88 g, 43%) as an oil: 1H-NMR (400 MHz, CDCl3) (rotamers are present; the data given is for the most abundant isomer) δ=7.39 (s, 1H), 6.50 (s, 1H), 3.78 (s, 3H), 2.42 (s, 3H), 2.20 (s, 3H), 1.62 (s, 6H). MS calcd. for C14H17NNaO3S (M+Na+) 302.1, found 302.1.
Step C: 2-(2,5-dimethyl-4-thiocyanato-phenoxy)-2-methyl-propionic acid methyl ester 31 (3.88 g, 13.9 mmol) is dissolved in methanol (50 mL). Potassium dihydrogenphosphate (0.23 g, 1.69 mmol), water (6 mL), and dithiothreitol (2.80 g, 18.2 mmol) are added and the mixture is stirred at reflux for 3 h. After cooling and concentration, the residue is taken up in ethyl acetate, washed with water and brine, dried over Na2SO4 and concentrated to yield an oil. Silica gel chromatography purification (0-65% ethyl acetate in hexanes) afforded 2-(4-mercapto-2,5-dimethyl-phenoxy)-2-methyl-propionic acid methyl ester 32 as a colourless oil (1.92 g, 54%): 1H-NMR (400 MHz, CDCl3) δ=7.09 (s, 1H), 6.47 (s, 1H), 3.79 (s, 1H), 3.10 (s, 1H), 2.24 (s, 3H), 2.15 (s, 3H), 1.56 (s, 6H).
Step D: 2-(4-mercapto-2,5-dimethyl-phenoxy)-2-methyl-propionic acid methyl ester 32 (0.51 g, 2.0 mmol) is dissolved in acetonitrile (4 mL), followed by 1,2-dibromoethane (1.7 mL, 20 mmol) and potassium carbonate (0.53 mg, 4.0 mmol). The mixture is stirred at room temperature for 12 h, after which the acetonitrile is evaporated and the remaining solid dissolved in dichloromethane (20 mL) and washed with water. The solvent is removed and the crude oil is purified by preparatory HPLC to afford 2-[4-(2-bromo-ethylsulfanyl)-2,5-dimethyl-phenoxy]-2-methyl-propionic acid methyl ester 33 as a clear oil (0.5 g, 69%) MS calcd. for C15H21BrO3S (M+H+) 361.0, found 361.1
Intermediate 34: 2-[4-(3-Bromo-propylsulfanyl)-2,5-dimethyl-phenoxy]-2-methyl-propionic acid methyl ester. Following the procedure for Intermediate 33, except substituting 1,3-dibromopropane for 1,2-dibromoethane, the title compound is prepared as a clear oil. (0.6 g, 80%) MS calcd. for C16H23BrO3S (M+H+) 375.1, found 375.1
Step A: 4-Methoxy-2,5-dimethyl-benzaldehyde 35 (1.24 g, 7.55 mmol) is dissolved in dry dichloromethane (12 mL). Neat boron tribromide (1.75 g, 18.5 mmol) is added dropwise, with stirring. A tan-coloured precipitate started to form. The suspension is stirred at room temperature for 5 d. The homogenous mixture is poured over 150 g ice. After the ice melted, the solid phenol 36 is isolated by filtration and dried (1.28 g, quantitative). 1H-NMR (400 MHz, dmso-d6) δ=10.40 (s 1H), 9.98 (s, 1H), 7.54 (s, 1H), 6.68 (s, 1H), 3.36 (s, 1H), 2.49 (s, 3H), 2.13 (s, 3H).
Step B: 4-Hydroxy-2,5-dimethyl-benzaldehyde 36 (30.56 g, 0.2 mol) is dissolved in acetonitrile (150 mL). Benzyl bromide (24 mL, 0.2 mol) is added, followed by powdered potassium carbonate (36.92 g, 0.27 mol). The mixture is stirred at 60° C. for 18 h. Cooling and concentration, followed by silica gel chromatography (0-20% ethyl acetate in hexanes) yielded 4-benzyloxy-2,5-dimethyl-benzaldehyde 37 as a colorless oil (27.6 g, 57%). 1H-NMR (400 MHz, CDCl3) δ=10.13 (s, 1H), 7.61 (s, 1H), 7.43 (m, 5H), 6.72 (s, 1H), 5.15 (s, 2H), 2.63 (s, 3H), 2.28 (s, 3H). MS calcd. for C16H17O2 (M+H+) 241.1, found 241.1.
Step C: 4-Benzyloxy-2,5-dimethyl-benzaldehyde 37 (4.77 g, 20 mmol) is dissolved in diethyl ether (30 mL). Sodium borohydride (1.0 g, 27 mmol) is added in one portion, followed by 5 mL absolute ethanol. The mixture is vigorously stirred for 3 h at room temperature, then carefully poured over 100 mL 1N aqueous HCl. Extraction with ethyl acetate, washing with water and brine, then concentration yielded (4-benzyloxy-2,5-dimethyl-phenyl)-methanol 38 as a soft solid (4.79 g, 99%). 1H-NMR (400 MHz, CDCl3) δ=7.39 (m, 5H), 7.11 (s, 1H), 6.73 (s, 1H), 5.07 (s, 2H), 4.61 (s, 2H), 2.35 (s, 3H), 2.25 (s, 3H).
Step D: (4-Benzyloxy-2,5-dimethyl-phenyl)-methanol 38 (4.79 g, 19.7 mmol) and ethyl diisopropylamine (6.0 mL, 34.4 mmol) are dissolved in dichloromethane (80 mL). Acetic anhydride (2.5 mL, 26.4 mmol) is added in one portion and the mixture is stirred at room temperature for 18 h. Washing with 1N HCl, water, saturated aqueous NaHCO3, saturated aqueous NH4Cl and brine, followed by drying over MgSO4 and concentration yields acetic acid 4-benzyloxy-2,5-dimethyl-benzyl ester 39 as an oil (4.93 g, quant.). 1H-NMR (400 MHz, CDCl3) δ=7.39 (m, 5H), 7.11 (s, 1H), 6.73 (s, 1H), 5.07 (s, 2H), 5.04 (s, 2H), 2.32 (s, 3H), 2.24 (s, 3H), 2.07 (s, 3H).
Step E: Acetic acid 4-benzyloxy-2,5-dimethyl-benzyl ester 39 (0.56 g, 2 mmol) is dissolved in dry dichloromethane (5 mL). (1-Methoxy-2-methyl-propenyloxy)-trimethylsilane (1 mL, 5 mmol) and magnesium perchlorate (0.09 g, 0.4 mmol) are added and the suspension is stirred overnight. Filtration and silica gel chromatography (0-30% ethyl acetate in hexanes) yielded 3-(4-benzyloxy-2,5-dimethyl-phenyl)-2,2-dimethyl-propionic acid methyl ester 40 as an oil (0.45 g, 69%). 1H-NMR (400 MHz, CDCl3) δ=7.37 (m, 5H), 6.81 (s, 1H), 6.67 (s, 1H), 5.02 (s, 2H), 2.82 (s, 3H), 2.25 (s, 3H), 2.20 (s, 3H), 1.18 (s, 6H).
Step F: 3-(4-Benzyloxy-2,5-dimethyl-phenyl)-2,2-dimethyl-propionic acid methyl ester 40 (0.45 g, 1.4 mmol) is dissolved in ethanol (20 mL). Palladium black on carbon (5%; 0.16 g, 5 mol %) is added and the mixture is vigorously stirred under 1 atm. hydrogen for 18 h. Filtration and concentration yielded 3-(4-hydroxy-2,5-dimethyl-phenyl)-2,2-dimethyl-propionic acid methyl ester 41 as an oil (0.11 g, 34%). 1H-NMR (400 MHz, CDCl3) δ=6.75 (s, 1H), 6.56 (s, 1H), 3.67 (s, 3H), 2.80 (s, 2H), 2.20 (s, 3H), 2.16 (s, 3H), 1.17 (s, 6H).
Step G: 3-(4-hydroxy-2,5-dimethyl-phenyl)-2,2-dimethyl-propionic acid methyl ester 41 (0.47 g, 2.0 mmol) is dissolved in acetonitrile (15 mL), followed by 1,2-dibromoethane (1.7 mL, 20 mmol) and cesium carbonate (3.25 g, 10 mmol). The mixture is stirred at room temperature for 8 h, followed by filtration and silica gel chromatography (0-30% ethyl acetate in hexanes) yielded 3-[4-(2-bromo-ethoxy)-2,5-dimethyl-phenyl]-2,2-dimethyl-propionic acid methyl ester 42 as a clear oil (0.5 g, 69%) MS calcd. for C16H23BrO3 (M+H+) 343.1, found 343.1
Intermediate 43: 3-[4-(3-Bromo-propoxy)-2,5-dimethyl-phenyl]-2,2-dimethyl-propionic acid methyl ester Following the procedure for Intermediate 42, except substituting 1,3-dibromopropane for 1,2-dibromoethane, the title compound is prepared as a clear oil. (0.6 g, 84%) MS calcd. for C17H25BrO3 (M+H+) 357.1, found 357.1
Intermediate 46: 2-[4-(2-Bromo-ethoxy)-2,5-dimethyl-phenylsulfanyl]-2-methyl-propionic acid methyl ester.
Step A: 2,5-Dimethyl-4-thiocyanato-phenol 30 (1.50 g, 8.4 mmol) is dissolved in methanol (30 mL). Potassium dihydrogenphosphate (0.32 g, 2.35 mmol), water (4 mL), and dithiothreitol (2.17 g, 14.1 mmol) are added and the mixture is stirred at reflux for 3 h. After cooling and concentration, the residue is taken up in ethyl acetate, washed with water and brine, dried over Na2SO4 and concentrated to yield an oil. It is used as such in the next step: 1H-NMR (400 MHz, CDCl3) δ=7.10 (s, 1H), 6.63 (s, 1H), 4.81 (s, 1H), 3.08 (s, 1H), 2.28 (s, 3H), 2.17 (s, 3H). MS calcd. for C8H11OS (M+H+) 155.1, found 155.0.
Step B: 4-Mercapto-2,5-dimethyl-phenol 44 obtained in step A above is dissolved in acetonitrile (30 mL). Powdered cesium carbonate (7.06 g, 21.7 mmol) is added, followed by 2-bromo-2-methyl-propionic acid methyl ester (2.40 mL, 18.5 mmol). The mixture is stirred at rt for 2 h. Filtration and concentration, followed by silica gel chromatography (0-50% ethyl acetate in hexanes) yielded 2-(4-hydroxy-2,5-dimethyl-phenylsulfanyl)-2-methyl-propionic acid methyl ester 45 (0.45 g, 13%) as a white waxy solid: 1H-NMR (400 MHz, CDCl3) δ=7.17 (s, 1H), 6.65 (s, 1H), 5.06 (s, 1H), 3.67 (s, 3H), 2.36 (s, 3H), 2.17 (s, 3H), 1.47 (s, 6H). MS calcd. for C13H19O3S (M+H+) 255.1, found 255.1.
Step C: 2-(4-Hydroxy-2,5-dimethyl-phenylsulfanyl)-2-methyl-propionic acid methyl ester 45 (0.25 g, 1.0 mmol) is dissolved in acetonitrile (4 mL), followed by 1,2-dibromoethane (1.7 mL, 20 mmol) and potassium carbonate (0.90 mL, 4.6 mmol). The mixture is stirred at 50° C. for 18 h, after which the solids are filtered off and the acetonitrile is evaporated. Silicagel chromatography (10-60% ethyl acetate in hexanes) afforded 2-[4-(2-bromo-ethoxy)-2,5-dimethyl-phenylsulfanyl]-2-methyl-propionic acid methyl ester 46 as a clear oil (0.18 g, 51%): 1H-NMR (400 MHz, CDCl3) δ=7.19 (s, 1H), 6.66 (s, 1H), 4.28 (t, J=6.2 Hz, 2H), 3.67 (s, 3H), 3.64 (t, J=6.2 Hz, 2H), 2.41 (s, 3H), 2.18 (s, 3H), 1.46 (s, 6H). MS calcd. for C15H21BrO3S (M+H) 361.0, found 361.1.
Intermediate 47: 4-Hydroxy-2,5-dimethyl-benzaldehyde 36 (7.18 g, 47.8 mmol) is dissolved in acetonitrile (60 mL). Powdered cesium carbonate (22.63 g, 69.5 mmol) is added, followed by 2-bromo-2-methyl-propionic acid methyl ester (7.00 mL, 54.1 mmol). The mixture is stirred at 50° C. for 8 h. Filtration and concentration, followed by silica gel chromatography (0-50% ethyl acetate in hexanes) yielded 2-(4-formyl-2,5-dimethyl-phenoxy)-2-methyl-propionic acid methyl ester 47 (3.50 g, 29%) as a white solid: 1H-NMR (400 MHz, CDCl3) δ=10.10 (s, 1H), 7.27 (s, 1H), 6.36 (s, 1H), 3.77 (s, 3H), 2.57 (s, 3H), 2.23 (s, 3H), 1.67 (s, 6H). MS calcd. for C14H19O4 (M+H+) 251.1, found 251.1.
Step A: The aminothiazole 1 (0.61 g, 2.49 mmol), the bromide 16 (0.55 g, 1.66 mmol) and potassium carbonate (0.28 g, 1.99 mmol) are suspended in dry acetonitrile (15 mL) in a sealed tube. The mixture is stirred vigorously and heated to 120° C. overnight. Then the reaction mixture is cooled to room temperature, filtered and the solvent is removed in vacuo. The remainder is dissolved in ethyl acetate and washed with water twice, the organic layer is dried over MgSO4 and concentrated. The remainder is purified by flash chromatography (silica, DCM/MeOH gradient) to afford 2-methyl-2-(2-methyl-4-{2-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-ethoxy}-phenoxy)-propionic acid methyl ester 90 (0.35 g, 43%) as a colourless oil: MS calculated for C24H26F3N2O4S (M+H+) 495.2, found 495.1.
Step B: The 2-Methyl-2-(2-methyl-4-{2-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-ethoxy}-phenoxy)-propionic acid methyl ester 90 (50 mg, 0.10 mmol), iodomethane (32 μL, 0.48 mmol) and Cs2CO3 (100 mg, 0.30 mmol) are suspended in dry acetonitrile (1 mL) in a sealed tube. The mixture is stirred vigorously and heated to 120° C. overnight, cooled to room temperature, and then used directly in the next step.
Step C: THF (3 mL) and 1 N LiOH (1 mL) are added to the solution derived from Step B. The mixture is stirred at 50° C. for 5 h, then acidified with 1 N HCl (˜1.5 mL). The reaction mixture is extracted with DCM (3 mL), the organic layer is separated and concentrated in vacuo. The remainder is taken up in DMSO (1 mL) and purified on reverse phase HPLC (H2O/MeCN gradient) to afford the title compound A1 (26 mg, 53%) as a white solid: 1H-NMR (600 MHz, (CD3)2SO) δ=7.89 (d, J=8.0 Hz, 2H), 7.63 (d, J=8.0 Hz, 2H), 6.82-6.63 (m, 4H), 4.24 (t, J=5.1 Hz, 2H), 4.02 (t, J=5.1 Hz, 2H), 3.29 (s, 3H), 2.20 (s, 3H), 1.54 (s, 6H). MS calculated for C24H26F3N2O4S (M+H+) 495.2, found 495.1.
Step A: The aminothiazole 1 (24 mg, 0.10 mmol), the sulfonyl chloride 24 (37 mg, 0.12 mmol) and triethylamine (28 μL, 0.20 mmol) are suspended in dry DCM (1 mL) and stirred at rt overnight. Then the reaction mixture is diluted with DCM and washed with water twice, the organic layer is separated, dried over MgSO4 and concentrated. The remainder is used in the next step without further purification.
Step B: The crude 2-methyl-2-{2-methyl-4-[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylsulfamoyl]-phenoxy}-propionic acid methyl ester 92 is dissolved in DMF (1 mL) and cooled to 0° C. Sodium hydride (60% dispersion, 8 mg, 0.11 mmol) is added and the mixture is stirred for 5 min. Then iodomethane (7 μL, 0.11 mmol) is added, and the ice-bath is removed. The mixture is stirred for 6 h at rt and used directly in the next step.
Step C: THF (1 mL) and 1 N LiOH (1 mL) are added to the solution derived from Step B. The mixture is stirred at 40° C. for 5 h, then acidified with 1 N HCl (˜1.2 mL). The reaction mixture is extracted with DCM (3 mL), the organic layer is separated and concentrated in vacuo. The remainder is taken up in DMSO (1 mL) and purified on reverse phase HPLC (H2O/MeCN gradient) to afford the title compound B1 (13 mg, 25%) as a colourless glass: 1H-NMR (600 MHz, (CD3)2SO) δ=7.90 (d, J=8.2 Hz, 2H), 7.66-7.60 (m, 4H), 7.24 (s, 1H), 6.71 (d, J=8.7 Hz, 1H), 3.52 (s, 3H), 2.24 (s, 3H), 1.67 (s, 6H). MS calculated for C22H22F3N2O5S2 (M+H+) 515.1, found 515.0.
Step A: The aminothiazole 1 (85 mg, 0.34 mmol) and the aldehyde 47 (91 mg, 0.37 mmol) are dissolved in dry THF (3 mL). Triethylorthoacetate (0.2 mL, 1 mmol) is added, then the mixture is stirred at rt for 30 min. Solid sodium triacetoxyborohydride (0.15 mmol, 0.7 mmol) is added and the mixture is stirred overnight at rt. The reaction mixture is diluted with 1N HCl and extracted with ethyl acetate twice, the organic layer is washed with brine, dried (MgSO4) and concentrated. The remainder is used in the next step without further purification.
Step B: The crude 2-(2,5-dimethyl-4-{[4-(4-trifluoromethyl-phenyl)-thiazol-2-ylamino]-methyl}-phenoxy)-2-methyl-propionic acid methyl ester 94 obtained in step A is dissolved in dimethoxyethane (2 mL). Lithium hydroxide monohydrate (0.10 g) is added, followed by water (0.5 mL). The mixture is vigorously stirred at 50° C. for 3 h. Purification on reverse phase HPLC (H2O/MeCN gradient) afforded the title compound C1 as a colourless glass:
1H-NMR (400 MHz, CDCl3) δ=7.81 (d, J=8.2 Hz, 2H), 7.74 (d, J=8.7 Hz, 1H), 7.13 (s, 1H), 6.68 (s, 1H), 6.63 (s, 1H), 4.44 (s, 2H), 2.32 (s, 3H), 2.22 (s, 3H), 1.63 (s, 6H). MS calculated for C23H24F3N2O3S2 (M+H+) 465.2, found 465.2.
By repeating the procedure described in the above examples A1 and B1, using appropriate starting materials, the following compounds of Formula I, as identified in Table 1, are obtained.
1H NMR 400 MHz and/or MS (m/z)
1H-NMR (600 MHz, CDCl3) δ = 7.81 (d, J = 8.4 Hz, 2H), 7.74 (d, J = 8.4 Hz, 2H), 6.82-6.60 (m, 4H), 4.20 (t, J = 5.0 Hz, 2H), 3.74 (t, J = 5.0 Hz, 2H), 2.21 (s, 3H), 1.54 (s, 6H). MS calculated for C23H24F3N2O4S (M + H+) 481.1, found 481.1.
1H-NMR (600 MHz, CDCl3) δ = 7.85 (d, J = 8.2 Hz, 2H), 7.63 (d, J = 8.2 Hz, 2H), 6.80 (d, J = 8.9 Hz, 1H), 6.75 (s, 1H), 6.72 (d, J = 3.0 Hz, 1H), 6.63 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.24 (t, J = 5.2 Hz, 2H), 4.03 (t, J = 5.2 Hz, 2H), 3.55 (t, J = 7.7 Hz, 2H), 2.20 (s, 3H), 1.80 (m, 2H), 1.54 (s, 6H), 1.00 (t, J = 7.4 Hz, 3H). MS calculated for C26H30F3N2O4S (M + H+) 523.2, found 523.1.
1H-NMR (600 MHz, CDCl3) δ = 7.87 (d, J = 8.2 Hz, 2H), 7.63 (d, J = 8.2 Hz, 2H), 6.80 (d, J = 8.9 Hz, 1H), 6.75 (s, 1H), 6.72 (d, J = 3.0 Hz, 1H), 6.63 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.23 (t, J = 5.2 Hz, 2H), 4.03 (t, J = 5.2 Hz, 2H), 3.57 (t, J = 7.7 Hz, 2H), 2.20 (s, 3H), 1.77 (m, 2H), 1.54 (s, 6H), 1.38 (m, 4H), 0.93 (t, J = 7.0 Hz, 3H). MS calculated for C28H34F3N2O4S (M + H+) 551.2, found 551.1.
1H-NMR (600 MHz, CDCl3) δ = 7.89 (d, J = 8.2 Hz, 2H), 7.63 (d, J = 8.2 Hz, 2H), 6.81 (d, J = 8.9 Hz, 1H), 6.80 (s, 1H), 6.75 (d, J = 3.0 Hz, 1H), 6.70 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.23 (t, J = 6.1 Hz, 2H), 4.09 (m, 1H), 3.87 (t, J = 6.1 Hz, 2H), 2.21 (s, 3H), 1.54 (s, 6H), 1.37 (d, J = 6.6 Hz, 3H). MS calculated for C26H30F3N2O4S (M + H+) 523.2, found 523.1.
1H-NMR (600 MHz, CDCl3) δ = 7.85 (d, J = 8.2 Hz, 2H), 7.64 (d, J = 8.2 Hz, 2H), 6.80 (d, J = 8.9 Hz, 1H), 6.75 (s, 1H), 6.71 (d, J = 3.0 Hz, 1H), 6.63 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.25 (t, J = 5.4 Hz, 2H), 4.05 (t, J = 5.4 Hz, 2H), 3.41 (d, J = 7.6 Hz, 2H), 2.25 (m, 1H), 2.20 (s, 3H), 1.54 (s, 6H), 1.01 (d, J = 6.6 Hz, 3H). MS calculated for C27H32F3N2O4S (M + H+) 537.2, found 537.1.
1H-NMR (600 MHz, CDCl3) δ = 7.86 (d, J = 8.2 Hz, 2H), 7.63 (d, J = 8.2 Hz, 2H), 6.80 (d, J = 8.9 Hz, 1H), 6.77 (s, 1H), 6.72 (d, J = 3.0 Hz, 1H), 6.62 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.23 (t, J = 5.4 Hz, 2H), 4.03 (t, J = 5.4 Hz, 2H), 3.85 (t, J = 5.4 Hz, 2H), 3.72 (t, J = 5.4 Hz, 2H), 3.37 (s, 3H), 2.20 (s, 3H), 1.54 (s, 6H). MS calculated for C27H30F3N2O5S (M + H+) 539.2, found 539.1.
1H-NMR (600 MHz, CDCl3) δ = 7.91 (d, J = 8.2 Hz, 2H), 7.63 (d, J = 8.2 Hz, 2H), 7.34 (m, 5H), 6.80 (d, J = 8.9 Hz, 1H), 6.80 (s, 1H), 6.70 (d, J = 3.0 Hz, 1H), 6.62 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.85 (s, 2H), 4.24 (t, J = 5.4 Hz, 2H), 3.99 (t, J = 5.4 Hz, 2H), 2.20 (s, 3H), 1.54 (s, 6H). MS calculated for C30H30F3N2O4S (M + H+) 571.2, found 571.1.
1H-NMR (600 MHz, CDCl3) δ = 7.90 (d, J = 8.2 Hz, 2H), 7.64 (d, J = 8.2 Hz, 2H), 7.35-7.24 (m, 5H), 6.80 (d, J = 8.9 Hz, 1H), 6.80 (s, 1H), 6.71 (d, J = 3.0 Hz, 1H), 6.63 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.18 (t, J = 5.2 Hz, 2H), 3.92 (t, J = 5.2 Hz, 2H), 3.82 (t, J = 7.7 Hz, 2H), 3.08 (t, J = 7.7 Hz, 2H), 2.20 (s, 3H), 1.54 (s, 6H). MS calculated for C31H32F3N2O4S (M + H+) 585.2, found 585.1.
1H-NMR (600 MHz, CDCl3) δ = 7.85 (d, J = 8.2 Hz, 2H), 7.63 (d, J = 8.2 Hz, 2H), 6.79 (d, J = 8.9 Hz, 1H), 6.74 (s, 1H), 6,71 (d, J = 3.0 Hz, 1H), 6.63 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.24 (t, J = 5.3 Hz, 2H), 4.04 (t, J = 5.3 Hz, 2H), 3.42 (d, J = 7.4 Hz, 2H), 2.20 (s, 3H), 1.90 (m, 1H), 1.76 (m, 4H), 1.70 (m, 1H), 1.54 (s, 6H), 1.22 (m, 6H), 1.03 (m, 4H). MS calculated for C30H36F3N2O4S (M + H+) 577.2, found 577.1.
1H-NMR (600 MHz, CDCl3) δ = 7.85 (d, J = 8.2 Hz, 2H), 7.63 (d, J = 8.2 Hz, 2H), 6.80 (d, J = 8.9 Hz, 1H), 6.74 (s, 1H), 6.72 (d, J = 3.0 Hz, 1H), 6.64 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.22 (t, J = 5.4 Hz, 2H), 4.00 (t, J = 5.3 Hz, 2H), 3.63 (d, J = 7.3 Hz, 2H), 2.84 (m, 1H), 2.20 (s, 3H), 2.14 (m, 2H), 1.97-1.81 (m, 4H), 1.54 (s, 6H). MS calculated for C28H32F3N2O4S (M + H+) 549.2, found 549.2.
1H-NMR (600 MHz, CDCl3) δ = 7.89 (d, J = 8.2 Hz, 2H), 7.63 (d, J = 8.2 Hz, 2H), 6.80 (d, J = 8.9 Hz, 1H), 6.78 (s, 1H), 6.72 (d, J = 3.0 Hz, 1H), 6.66 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.26 (t, J = 5.4 Hz, 2H), 4.09 (t, J = 5.3 Hz, 2H), 3.49 (d, J = 6.8 Hz, 2H), 2.20 (s, 3H), 1.54 (s, 6H), 1.21 (m, 1H), 0.64 (m, 2H), 0.38 (m, 2H). MS calculated for C27H30F3N2O4S (M + H+) 535.2, found 535.2.
1H-NMR (600 MHz, CDCl3) δ = 7.86 (d, J = 8.2 Hz, 2H), 7.62 (d, J = 8.2 Hz, 2H), 6.88 (s, 1H), 6.78 (d, J = 8.9 Hz, 1H), 6.69 (d, J = 3.0 Hz, 1H), 6.54 (dd, J = 3.0 Hz, J = 8.9 Hz, 1H), 4.12 (m, 4H), 3.80 (t, J = 4.9 Hz, 2H), 3.41 (m, 2H), 3.23 (q, J = 7.2 Hz, 4H), 2.18 (s, 3H), 1.54 (s, 6H), 1.35 (t, J = 7.2 Hz, 6H). MS calculated for C29H37F3N3O4S (M + H+) 580.2, found 580.2.
1H-NMR (600 MHz, CDCl3) δ = 7.93 (d, J = 8.1 Hz, 2H), 7.62 (d, J = 8.1 Hz, 2H), 6.82 (s, 1H), 6.70 (s, 1H), 6.61 (s, 1H), 4.23 (t, 1 =5.1 Hz, 2H), 4.01 (t, J = 5.1 Hz, 2H), 3.27 (s, 3H), 2.18 (s, 3H), 2.13 (s, 3H), 1.53 (s, 6H). MS calculated for C25H28F3N2O4S (M + H+) 509.2, found 509.1.
1H-NMR (600 MHz, CDCl3) δ = 7.80 (d, J = 8.2 Hz, 2H), 7.66 (d, J = 8.2 Hz, 2H), 6.72 (s, 1H), 6.68 (s, 1H), 6.61 (s, 1H), 4,15 (t, J = 4.9 Hz, 2H), 3.74 (t, J = 4.9 Hz, 2H), 2.19 (s, 3H), 2.03 (s, 3H), 1.54 (s, 6H). MS calculated for C24H26F3N2O4S (M + H+) 495.2, found 495.1.
1H-NMR (600 MHz, CDCl3) δ = 7.90 (d, J = 8.1 Hz, 2H), 7.60 (d, J = 8.1 Hz, 2H), 6.78 (s, 1H), 6.71 (s, 1H), 6.59 (s, 1H), 4.01 (t, J = 4.8 Hz, 2H), 3.78 (t, J = 7.0 Hz, 2H), 3.19 (s, 3H), 2,20 (s, 3H), 2.19 (m, 2H), 2.17 (s, 3H), 1.53 (s, 6H). MS calculated for C26H30F3N2O4S (M + H+) 523.2, found 523.1.
1H-NMR (600 MHz, CDCl3) δ = 7.84 (d, J = 8.1 Hz, 2H), 7.70 (d, J = 8.1 Hz, 2H), 6.72 (s, 1H), 6.71 (s, 1H), 6.64 (s, 1H), 4.08 (t, J = 5.6 Hz, 2H), 3.58 (m, 2H), 2.26 (m, 2H), 2.20 (s, 3H), 2.18 (m, 2H), 2.18 (s, 3H), 1.54 (s, 6H). MS calculated for C25H28F3N2O4S (M + H+) 509.2, found 509.1.
1H-NMR (600 MHz, CDCl3) δ = 7.91 (d, J = 8.1 Hz, 2H), 7.59 (d, J = 8.1 Hz, 2H), 6.79 (s, 1H), 6.69 (s, 1H), 6.60 (s, 1H), 3.98 (t, J = 5.8 Hz, 2H), 3.64 (t, J = 6.9 Hz, 2H), 3.16 (s, 3H), 2.19 (s, 3H), 2.14 (s, 3H), 1.89 (m, 4H), 1.53 (s, 6H). MS calculated for C26H30F3N2O4S (M + H+) 537.2, found 537.1.
1H-NMR (600 MHz, CDCl3) δ = 7.78 (d, J = 8.2 Hz, 2H), 7.63 (d, J = 8.2 Hz, 2H), 6.72 (s, 1H), 6.68 (s, 1H), 6.58 (s, 1H), 3.93 (t, J = 5.5 Hz, 2H), 3.34 (t, J = 6.7 Hz, 2H), 2.20 (s, 3H), 2.08 (s, 3H), 1.92 (m, 4H), 1.55 (s, 6H). MS calculated for C26H30F3N2O4S (M + H+) 523.2, found 523.1.
1H-NMR (600 MHz, CDCl3) δ = 7.73 (d, J = 8.8 Hz, 2H), 7.28 (d, J = 8.4 Hz, 2H), 6.68 (s, 1H), 6.63 (s, 1H), 6.60 (s, 1H), 4.17 (t, J = 5.2 Hz, 2H), 3.75 (t, J = 5.2 Hz, 2H), 2.20 (s, 3H), 2.08 (s, 3H), 1.53 (s, 6H). MS calculated for C24H26F3N2O5S (M + H+) 511.1, found 511.2.
1H-NMR (600 MHz, CDCl3) δ = 7.78 (d, J = 8.8 Hz, 2H), 7.24 (d, J = 8.4 Hz, 2H), 6.70 (s, 1H), 6.66 (s, 1H), 6.62 (s, 1H), 4.24 (t, J = 5.2 Hz, 2H), 4.11 (t, J = 5.2 Hz, 2H), 3.43 (s, 3H), 2.19 (s, 3H), 2.12 (s, 3H), 1.53 (s, 6H). MS calculated C25H28F3N2O5S (M + H+) 525.2, found 525.2.
1H-NMR (600 MHz, CDCl3) δ = 7.62 (d, J = 8.8 Hz, 2H), 6.98 (d, J = 8.8 Hz, 2H), 6.68 (s, 1H), 6.64 (s, 1H), 6.41 (s, 1H), 4.19 (t, J = 5.2 Hz, 2H), 3.85 (s, 3H), 3.74 (t, J = 5.2 Hz, 2H), 2.20 (s, 3H), 2.11 (s, 3H), 1.52 (s, 6H). MS calculated for C24H29N2O5S (M + H+) 457.2, found 457.2.
1H-NMR (600 MHz, CDCl3) δ = 7.68 (d, J = 8.8 Hz, 2H), 6.92 (d, J = 8.8 Hz, 2H), 6.68 (s, 1H), 6.62 (s, 1H), 6.52 (s, 1H), 4.24 (t, J = 4.8 Hz, 2H), 4.13 (t, J = 4.8 Hz, 2H), 3.83 (s, 1H), 3.36 (s, 3H), 2.18 (s, 3H), 2.12 (s, 3H), 1.52 (s, 6H). MS calculated for C25H31N2O5S (M + H+) 471.2, found 471.2.
1H-NMR (600 MHz, CDCl3) δ = 7.84 (d, J = 8.8 Hz, 2H), 7.63 (t, J = 8.4 Hz, 4H), 7.45 (t, J = 7.6 Hz, 2H), 7.36 (t, J = 7.6 Hz, 1H), 6.69 (s, 2H), 6.64 (s, 1H), 4.28 (t, J = 5.2 Hz, 2H), 4.21 (t, J = 5.2 Hz, 2H), 3.39 (s, 3H), 2.19 (s, 3H), 2.13 (s, 3H), 1.52 (s, 6H). MS calculated for C30H33N2O4S (M + H+) 517.2, found 517.3.
1H-NMR (600 MHz, CDCl3) δ = 7.70 (s, 4H), 7.52 (s, 1H), 6.68 (s, 1H), 6.60 (s, 1H), 4.10 (t, J = 5.2 Hz, 2H), 3.86 (t, J = 4.8 Hz, 2H), 2.20 (s, 3H), 2.12 (s, 3H), 1.53 (s, 6H). MS calculated for C24H26F3N2O5 (M + H+) 479.2, found 479.2.
1H-NMR (600 MHz, CDCl3) δ = 7.78 (d, J = 8.8 Hz, 2H), 7.62 (d, J = 8.0 Hz, 2H), 7.55 (s, 1H), 6.69 (s, 1H), 6.62 (s, 1H), 4.18 (t, J = 5.0 Hz, 2H), 3.94 (t, J = 5.0 Hz, 2H), 3.31 (s, 3H), 2.19 (s, 3H), 2.10 (s, 3H), 1.52 (s, 6H). MS calculated for C25H28F3N2O5 (M + H+) 493.2, found 493.2.
1H-NMR (600 MHz, CDCl3) δ = 7.73 (d, J = 8.8 Hz, 2H), 7.27 (d, J = 8.4 Hz, 2H), 6.71 (s, 1H), 6.63 (s, 1H), 6.57 (s, 1H), 4.06 (t, J = 5.6 Hz, 2H), 3.54 (t, J = 6.8 Hz, 2H), 2.25 (m, 2H), 2.19 (s, 3H), 2.16 (s, 3H), 1.53 (s, 6H). MS calculated for C25H28F3N2O5S (M + H+) 525.2, found 525.2.
1H-NMR (600 MHz, CDCl3) δ = 7.75 (d, J = 8.8 Hz, 2H), 7.22 (d, J = 8.0 Hz, 2H), 6.70 (s, 1H), 6.61 (s, 1H), 6.59 (s, 1H), 4.02 (t, J = 5.6 Hz, 2H), 3.82 (t, J = 7.2 Hz, 2H), 3.26 (s, 3H), 2.22 (m, 2H), 2.17 (s, 6H), 1.53 (s, 6H). MS calculated for C26H30F3N2O5S (M + H+) 539.2, found 539.2.
1H-NMR (600 MHz, CDCl3) δ = 7.61 (d, J = 8.8 Hz, 2H), 6.97 (d, J = 9.2 Hz, 2H), 6.70 (s, 1H), 6.63 (s, 1H), 6.39 (s, 1H), 4.06 (t, J = 5.6 Hz, 2H), 3.84 (s, 3H), 3.52 (t, J = 6.8 Hz, 2H), 2.27 (m, 2H), 2.20 (s, 3H), 2.16 (s, 3H), 1.53 (s, 6H). MS calculated for C25H31N2O5S (M + H+) 471.2, found 471.2.
1H-NMR (600 MHz, CDCl3) δ = 7.65 (d, J = 8.8 Hz, 2H), 6.90 (d, J = 9.2 Hz, 2H), 6.70 (s, 1H), 6.60 (s, 1H), 6.46 (s, 1H), 4.02 (t, J = 5.6 Hz, 2H), 3.83 (m, 5H), 3.28 (s, 3H), 2.23 (m, 2H), 2.18 (s, 6H), 1.53 (s, 6H). MS calculated for C26H33N2O5S (M + H+) 485.2, found 485.2.
1H-NMR (600 MHz, CDCl3) δ = 7.76 (d, J = 8.4 Hz, 2H), 7.70 (d, J = 8.4 Hz, 2H), 7.46 (t, J = 7.2 Hz, 2H), 7.38 (t, J = 7.2 Hz, 1H), 6.71 (s, 1H), 6.64 (s, 1H), 6.57 (s, 1H), 4.07 (t, J = 5.6 Hz, 2H), 3.55 (m, 2H), 2.29 (m, 2H), 2.20 (s, 3H), 2.17 (s, 3H), 1.54 (s, 6H). MS calculated for C30H33N2O4S (M + H+) 517.2, found 517.3.
1H-NMR (600 MHz, CDCl3) δ = 7.76 (d, J = 8.4 Hz, 2H), 7.62 (t, J = 6.8 Hz, 4H), 7.45 (t, J = 7.6 Hz, 2H), 7.36 (t, J = 7.2 Hz, 1H), 6.71 (s, 1H), 6.63 (s, 1H), 6.61 (s, 1H), 4.04 (t, J = 5.6 Hz, 2H), 3.87 (t, J = 6.8 Hz, 2H), 3.33 (s, 3H), 2.25 (m, 2H), 2.18 (s, 6H), 1.53 (s, 6H). MS calculated for C31H35N2O4S (M + H+) 531.2, found 531.2.
1H-NMR (600 MHz, CDCl3) δ = 7.69 (s, 4H), 7.47 (s, 1H), 6.70 (s, 1H), 6.62 (s, 1H), 4.05 (t, J = 5.6 Hz, 2H), 3.68 (m, 2H), 2.20 (s, 3H), 2.17 (m, 2H), 2.16 (s, 3H), 1.53 (s, 6H). MS calculated for C25H28F3N2O5 (M + H+) 493.2, found 493.2.
1H-NMR (600 MHz, CDCl3) δ = 7.77 (d, J = 8.8 Hz, 2H), 7.65 (d, J = 8.8 Hz, 2H), 7.45 (s, 1H), 6.70 (s, 1H), 6.62 (s, 1H), 4.04 (t, J = 5.6 Hz, 2H), 3.83 (m, 2H), 3.28 (s, 3H), 2.18 (s, 3H), 2.16 (s, 3H), 1.53 (s, 6H). MS calculated for C26H30F3N2O5 (M + H+) 507.2, found 507.2.
1H-NMR (400 MHz, CDCl3) δ = 7.76 (d, J = 8.4 Hz, 2H), 7.71 (d, J = 8.4 Hz, 2H), 7.23 (s, 1H), 6.66 (s, 1H), 6.65 (s, 1H), 3.47 (t, J = 6.8 Hz, 2H), 3.07 (t, J = 7.2 Hz, 2H), 2.33 (s, 3H), 2.15 (s, 3H), 1.60 (s, 6H). MS calcd. for C24H26F3N2O3S2 (M + H+) 511.1, found 511.2.
1H-NMR (400 MHz, CDCl3) δ = 7.89 (d, J = 8.4 Hz, 2H), 7.71 (d, J = 8.4 Hz, 2H), 7.15 (s, 1H), 6.68 (s, 1H), 6.65 (s, 1H), 3.42 (t, J = 6.8 Hz, 2H), 2.94 (t, J = 7.2 Hz, 2H), 2.33 (s, 3H), 2.16 (s, 3H), 2.11 (m, 2H), 1.60 (s, 6H). MS calcd. for C25H28F3N2O3S2 (M + H+) 525.1, found 525.2.
1H-NMR (400 MHz, CDCl3) δ = 7.75 (d, J = 8.0 Hz, 2H), 7.65 (d, J = 8.4 Hz, 2H), 7.18 (s, 1H), 6.72 (s, 1H), 6.66 (s, 1H), 3.75 (t, J = 6.8 Hz, 2H), 3.12 (t, J = 7.2 Hz, 2H), 3.10 (s, 3H), 2.29 (s, 3H), 2.11 (s, 3H), 1.63 (s, 6H). MS calcd. for C25H28F3N2O3S2 (M + H+) 525.1, found 525.2.
1H-NMR (400 MHz, CDCl3) δ = 7.78 (d, J = 8.4 Hz, 2H), 7.65 (d, J = 8.4 Hz, 2H), 7.14 (s, 1H), 6.70 (s, 1H), 6.65 (s, 1H), 3.70 (t, J = 6.8 Hz, 2H), 3.23 (s, 3H), 2.86 (t, J = 7.2 Hz, 2H), 2.32 (s, 3H), 2.15 (s, 3H), 2.00 (m, 2H), 1.60 (s, 6H). MS calcd. for C26H30F3N2O3S2 (M + H+) 539.1, found 539.2.
1H-NMR (400 MHz, CDCl3) δ = 7.75 (d, J = 8.0 Hz, 2H), 7.58 (d, J = 8.0 Hz, 2H), 6.82 (s, 1H), 6.66 (s, 1H), 6.52 (s, 1H), 4.10 (t, J = 5.2 Hz, 2H), 3.67 (t, J = 4.8 Hz, 2H), 2.78 (s, 2H), 2.19 (s, 3H), 2.02 (s, 3H), 1.12 (s, 6H). MS calcd. for C25H28F3N2O3S (M + H+) 493.2, found 493.2.
1H-NMR (400 MHz, CDCl3) δ = 7.81 (d, J = 8.0 Hz, 2H), 7.67 (d, J = 8.0 Hz, 2H), 6.90 (s, 1H), 6.69 (s, 1H), 6.59 (s, 1H), 4.06 (t, J = 5.6 Hz, 2H), 3.52 (t, J = 6.8 Hz, 2H), 2.85 (s, 2H), 2.26 (s, 3H), 2.21 (m, 2H), 2.16 (s, 3H), 1.12 (s, 6H). MS calcd. for C26H30F3N2O3S (M + H+) 507.2, found 507.3.
1H-NMR (400 MHz, CDCl3) δ = 7.91 (d, J = 8.0 Hz, 2H), 7.62 (d, J = 8.0 Hz, 2H), 6.88 (s, 1H), 6.79 (s, 1H), 6.59 (s, 1H), 4.25 (t, J = 5.0 Hz, 2H), 4.05 (t, J = 4.8 Hz, 2H), 3.30 (s, 3H), 2.85 (s, 2H), 2.25 (s, 3H), 2.12 (s, 3H), 1.18 (s, 6H). MS calcd. for C26H30F3N2O3S (M + H+) 507.2, found 507.2.
1H-NMR (400 MHz, CDCl3) δ = 7.79 (d, J = 8.4 Hz, 2H), 7.51 (d, J = 8.4 Hz, 2H), 6.80 (s, 1H), 6.66 (s, 1H), 6.48 (s, 1H), 3.94 (t, J = 5.6 Hz, 2H), 3.69 (t, J = 6.8 Hz, 2H), 3.12 (s, 3H), 2.77 (s, 2H), 2.15 (s, 3H), 2.11 (m, 2H), 2.09 (s, 3H), 1.10 (s, 6H). MS calcd. for C26H30F3N2O3S (M + H+) 521.2, found 521.3.
1H-NMR (400 MHz, CDCl3) δ = 7.81 (d, J = 8.2 Hz, 2H), 7.74 (d, J = 8.4 Hz, 2H), 7.24 (s, 1H), 6.74 (s, 1H), 6.70 (s, 1H), 4.25 (t, J = 6.8 Hz, 2H), 3.78 (t, J = 7.2 Hz, 2H), 2.44 (s, 3H), 2.10 (s, 3H), 1.46 (s, 6H). MS calcd. for C24H26F3N2O2S2 (M + H+) 511.1, found 511.1.
1H-NMR (600 MHz, CDCl3) δ = 7.90 (d, J = 8.2 Hz, 2H), 7.69-7.61 (m, 5H), 7.24 (s, 1H), 6.75 (d, J = 8.4 Hz, 1H), 4.74 (s, 2H), 3.52 (s, 3H), 2.30 (s, 3H). MS calculated for C20H18F3N2O5S2 (M + H+) 487.1, found 487.0.
1H-NMR (400 MHz, CDCl3) δ = 7.84 (d, J = 8.4 Hz, 2H), 7.78 (s, 1H), 7.56 (d, J = 8.4 Hz, 2H), 7.15 (s, 1H) 6.48 (s, 1H), 3.43 (s, 3H), 2.34 (s, 3H), 2.17 (s, 3H), 1.61 (s, 6H). MS calcd. for C23H24F3N2O5S2 (M + H+) 244.1, found 244.0.
Transfection assays are used to assess the ability of compounds of the invention to modulate the transcriptional activity of the PPARs. Briefly, expression vectors for chimeric proteins containing the DNA binding domain of yeast GAL4 fused to the ligand-binding domain (LBD) of either PPARδ, PPARα or PPARγ are introduced via transient transfection into mammalian cells, together with a reporter plasmid where the luciferase gene is under the control of a GAL4 binding site. Upon exposure to a PPAR modulator, PPAR transcriptional activity varies, and this can be monitored by changes in luciferase levels. If transfected cells are exposed to a PPAR agonist, PPAR-dependent transcriptional activity increases and luciferase levels rise.
293T human embryonic kidney cells (8×106) are seeded in a 175 cm2 flask a day prior to the start of the experiment in 10% FBS, 1% Penicillin/Streptomycin/Fungizome, DMEM Media. The cells are harvested by washing with PBS (30 ml) and then dissociating using trypsin (0.05%; 3 ml). The trypsin is inactivated by the addition of assay media (DMEM, CA-dextran fetal bovine serum (5%). The cells are spun down and resuspended to 170,000 cells/ml. A Transfection mixture of GAL4-PPAR LBD expression plasmid (1 μg), UAS-luciferase reporter plasmid (1 μg), Fugene (3:1 ratio; 6 μL) and serum-free media (200 μL) was prepared and incubated for 15-40 minutes at room temperature. Transfection mixtures are added to the cells to give 0.16M cells/mL, and cells (50 μl/well) are then plated into 384 white, solid-bottom, TC-treated plates. The cells are further incubated at 37° C., 5.0% CO2 for 5-7 hours. A 12-point series of dilutions (3 fold serial dilutions) are prepared for each test compound in DMSO with a starting compound concentration of 10 μM. Test compound (500 nl) is added to each well of cells in the assay plate and the cells are incubated at 37° C., 5.0% CO2 for 18-24 hours. The cell lysis/luciferase assay buffer, Bright-Glo™ (25%; 25 μl; Promega), is added to each well. After a further incubation for 5 minutes at room temperature, the luciferase activity is measured.
Raw luminescence values are normalized by dividing them by the value of the DMSO control present on each plate. Normalized data is analyzed and dose-response curves are fitted using Prizm graph fitting program. EC50 is defined as the concentration at which the compound elicits a response that is half way between the maximum and minimum values. Relative efficacy (or percent efficacy) is calculated by comparison of the response elicited by the compound with the maximum value obtained for a reference PPAR modulator.
Compounds of Formula I, in free form or in pharmaceutically acceptable salt form, exhibit valuable pharmacological properties, for example, as indicated by the in vitro tests described in this application. Compounds of the invention preferably have an EC50 for PPARδ and/or PPARα and/or PPARγ, of less than 5 μM, more preferably less than 1 μM, more preferably less than 500 nm, more preferably less than 100 nM. Compounds of the invention preferably have an EC50 for PPARδ that is less than or equal to PPARα which in turn has an EC50 that is at least 10-fold less than PPARγ.
It is understood that the examples and embodiments described herein are for illustrative purposes only and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application and scope of the appended claims. All publications, patents, and patent applications cited herein are hereby incorporated by reference for all purposes.
This application claims the benefit of priority to U.S. Provisional Patent Application No. 60/734,678, filed 7 Nov. 2005. The full disclosure of this application is incorporated herein by reference in its entirety and for all purposes.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/US06/43586 | 11/7/2006 | WO | 00 | 10/13/2009 |
| Number | Date | Country | |
|---|---|---|---|
| 60734678 | Nov 2005 | US |
