Use of a TRPM5 inhibitor to regulate insulin and GLP-1 release

1. A method of treating type 2 diabetes in a mammal, comprising administering to a subject in need of said treatment an effective amount of one or more compounds of Formula I:

or a physiologically acceptable salt thereof, wherein

R 1 is C 6-14 aryl, 5-14 membered heteroaryl, C 3-14 cycloalkyl, C 3-14 cycloalkenyl, 3-14 membered cycloheteroalkyl, 3-14 membered cycloheteroalkenyl, or C 1-6 alkyl, each of which is optionally substituted;

R 2 is H, C 1-6 alkyl, or C 6-10 aryl;

R 3 is H, C 1-6 alkyl, C 6-10 aryl, or cyano;

R 4 is C 6-14 aryl, 5-14 membered heteroaryl, C 3-14 cycloalkyl, C 3-14 cycloalkenyl, 3-14 membered cycloheteroalkyl, or 3-14 membered cycloheteroalkenyl, each of which is optionally substituted, or is cyano;

L 1 is absent, or is a linker containing 1-10 carbon atoms substituted with oxo at one carbon atom, a linker containing 2-10 carbon and heteroatoms, or a linker containing 1-10 heteroatoms, any of which is optionally substituted; and

L 2 is absent, or is a linker containing 1-10 heteroatoms and which is optionally substituted;

provided that when L 1 is absent, then L 2 is —N═N—, or when L′ is —C(O)—, then R 1 is C 3-14 cycloalkyl;

wherein said compound is administered in an amount sufficient to treat type 2 diabetes.

2. A method of treating type 2 diabetes in a mammal, comprising administering to a subject in need of said treatment an effective amount of one or more compounds selected from the group consisting of

methyl 4-((E)-((Z)-1-(2-(benzo[d]thiazol-2-yl)hydrazono)-2-methyl-propyl)-diazenyl)benzoate;

(E)-2-(4-bromo-2-((2-(quinolin-8-yl)hydrazono)methyl)phenoxy)acetic acid;

(E)-N′-(3,4-dimethoxybenzylidene)-2-(naphthalene-1-yl)acetohydrazide;

(E)-N′-(3,4-dimethoxybenzylidene)-2-phenylcyclopropane-carbohydrazide;

(E)-3-cyclohexenyl-4-hydroxy-N′-(4-methoxybenzylidene)-butanehydrazide;

(E)-N′-(3,4-dimethoxybenzylidene)-4-hydroxyhexanehydrazide;

2-((Z)-2-(phenyl-((E)-phenyldiazenyl)methylene)hydrazinyl)benzoic acid;

(E)-N′-(3,4-dimethoxybenzylidene)-2-(m-tolyloxy)acetohydrazide;

(E)-N′-(4-(allyloxy)-3-methoxybenzylidene)-2-(3-bromobenzylthio)-acetohydrazide;

(E)-N′-(4-isopropylbenzylidene)bicyclo[4.1.0]heptane-7-carbohydrazide;

(Z)-1,3,3-trimethyl-2-((E)-2-(2-(4-nitrophenyl)hydrazono)-ethylidene)indoline;

(E)-N′-(4-(diethylamino)-2-hydroxybenzylidene)-2-phenylcyclopropanecarbohydrazide;

(4-(trifluoromethylthio)phenyl)carbonohydrazonoyldicyanide;

N-((E)-3-((Z)-2-(1,5-dimethyl-2-oxoindolin-3-ylidene)hydrazinyl)-3-oxo-1-phenylprop-1-en-2-yl)benzamide;

(Z)-2-(2-((1-butyl-1H-indol-3-yl)methylene)hydrazinyl)benzoic acid;

(E)-4-((2-benzyl-2-phenylhydrazono)methyl)pyridine;

(Z)-N′-((1H-Pyrrol-2-yl)methylene)tricyclo[3.3.1.1 3,7 ]decane-3-carbohydrazide;

(Z)-1-(2-(4-(ethyl(2-hydroxyethyl)amino)phenyl)hydrazono)-naphthalen-2-(1H)-one;

(E)-4-((2-(5-chloro-3-(trifluoromethyl)pyridin-2-yl)-2-2-methyl-hydrazono)methyl)benzene-1,3-diol;

(E)-2-(3,4-dimethylphenylamino)-N′-(4-morpholino-3-nitro-benzylidene)acetohydrazide;

(Z)-3-(2-nitro-5-(pyrrolidin-1-yl)phenyl)hydrazono)quinuclidine;

(E)-2-((2-(1H-benzo[d]imidazol-2-yl)hydrazono)methyl)-5-(diethylamino)phenol;

3-carbazol-9-ylpropionic acid (3,4-dimethoxybenzylidene)hydrazide; and

(4,8-dimethylquinolin-2-ylsulfanyl)acetic acid (3,4-dimethoxybenzylidene)hydrazide.

3. The method according to claim 1 , wherein said subject is human.

4. The method according to claim 1 , wherein R 1 is optionally substituted C 6-10 aryl, optionally substituted 5-14 membered heteroaryl, optionally substituted C 3-10 cycloalkyl, optionally substituted C 3-10 cycloalkenyl, optionally substituted 3-10 membered cycloheteroalkyl, optionally substituted 3-10 membered cycloheteroalkenyl, or optionally substituted C 1-6 alkyl.

5. The method according to claim 1 , wherein R 2 is H.

6. The method according to claim 1 , wherein R 4 is optionally substituted C 6-10 aryl, optionally substituted 5-10 membered heteroaryl, optionally substituted C 3-10 cycloalkyl, optionally substituted C 3-10 cycloalkenyl, optionally substituted 3-10 membered cycloheteroalkyl, or optionally substituted 3-10 membered cycloheteroalkenyl.

7. The method according to claim 1 , wherein R 1 is unsubstituted phenyl, phenyl or naphthyl, each of which is substituted 1, 2, or 3 substituents independently selected from the group consisting of amino, hydroxy, nitro, halogen, cyano, thiol, C 1-6 alkyl, C 2-6 alkenyl, C 1-6 haloalkyl, C 1-6 alkoxy, C 3-6 alkenyloxy, C 1-6 alkylenedioxy, C 1-6 alkoxy(C 1-6 )alkyl, C 1-6 aminoalkyl, C 1-6 aminoalkoxy, C 1-6 hydroxyalkyl, C 2-6 hydroxyalkoxy, mono(C 1-4 alkylamino, di(C 1-4 )alkylamino, C 2-6 alkylcarbonylamino, C 2-6 alkoxycarbonylamino, C 2-6 alkoxycarbonyl, carboxy, (C 1-6 )alkoxy(C 2-6 )alkoxy, C 2-6 carboxyalkoxy, and C 2-6 carboxyalkyl, a nitrogen-containing heteroaryl, or selected from the group consisting of pyridyl, pyrimidinyl, imidazolyl, tetrazolyl, furanyl, thienyl, indolyl, azaindolyl, quinolinyl, pyrrolyl, benzimidazolyl, and benzothiazolyl, each of which is optionally substituted.

8. The method according to claim 1 , wherein R 4 is unsubstituted phenyl, phenyl or naphthyl, each of which is substituted 1, 2, or 3 substituents independently selected from the group consisting of amino, hydroxy, nitro, halogen, cyano, thiol, C 1-6 alkyl, C 2-6 alkenyl, C 1-6 haloalkyl, C 1-6 alkoxy, C 3-6 alkenyloxy, C 1-6 alkylenedioxy, C 1-6 alkoxy(C 1-6 )alkyl, C 1-6 aminoalkyl, C 1-6 aminoalkoxy, C 1-6 hydroxyalkyl, C 2-6 hydroxyalkoxy, mono(C 1-4 )alkylamino, di(C 1-4 )alkylamino, C 2-6 alkylcarbonylamino, C 2-6 alkoxycarbonylamino, C 2-6 alkoxycarbonyl, carboxy, (C 1-6 )alkoxy(C 2-6 )alkoxy, C 2-6 carboxyalkoxy, and C 2-6 carboxyalkyl, a nitrogen-containing heteroaryl, or selected from the group consisting of pyridyl, pyrimidinyl, imidazolyl, tetrazolyl, furanyl, thienyl, indolyl, azaindolyl, quinolinyl, pyrrolyl, benzimidazolyl, and benzothiazolyl, each of which is optionally substituted.

9. The method according to claim 1 , wherein

(a) R 1 is optionally substituted C 6-10 aryl; R 2 is H or C 1-6 alkyl; R 3 is H or C 1-6 alkyl; and R 4 is optionally substituted C 6-10 aryl;

(b) R 1 is optionally substituted 5-10 membered heteroaryl; R 2 is H or C 1-6 alkyl; R 3 is H or C 1-6 alkyl; and R 4 is optionally substituted C 6-10 aryl;

(c) R 1 is optionally substituted C 6-10 aryl; R 2 is H or C 1-6 alkyl; R 3 is H or C 1-6 alkyl; and R 4 is optionally substituted 5-10 membered heteroaryl;

(d) R 1 is optionally substituted 5-10 membered heteroaryl; R 2 is H or C 1-6 alkyl; R 3 is H or C 1-6 alkyl; and R 4 is optionally substituted 5-10 membered heteroaryl;

(e) R 1 is optionally substituted C 6-10 aryl; R 2 is H or C 1-6 alkyl; R 3 is H or C 1-6 alkyl; and R 4 is optionally substituted C 3-10 cycloalkyl;

(f) R 1 is optionally substituted 5-10 membered heteroaryl; R 2 is H or C 1-6 alkyl; R 3 is H or C 1-6 alkyl; and R 4 and L 2 together form —N═N-aryl;

(g) R 1 is heteroaryl; R 2 is H; R 4 is heteroaryl; L 1 is absent; and L 2 is N═N;

(h) R 1 is aryl; R 2 is H; R 3 is H; R 4 is aryl or heteroaryl; L 1 is as defined in claim 1 ; and L 2 is absent; or

(i) R 1 is cycloalkenyl; R 2 is H; R 3 is H; R 4 is aryl or heteroaryl; L 1 is as defined in claim 1 ; and L 2 is absent.

10. The method according to claim 1 , wherein R 2 is C 1-6 alkyl.

11. The method according to claim 1 , wherein R 2 is C 1-10 aryl.

12. The method according to claim 1 , wherein R 3 is H.

13. The method according to claim 1 , wherein R 3 is C 1-6 alkyl.

14. The method according to claim 1 , wherein R 3 is C 6-10 aryl.

15. The method according to claim 1 , wherein R 3 is cyano.

16. The method according to claim 1 , wherein L 1 is absent and L 2 is —N═N—.

17. The method according to claim 1 , wherein L 1 is a linker containing 1-10 carbon atoms substituted with oxo at one carbon atom, which is further optionally substituted, provided that when L 1 is —C(O)—, then R 1 is C 3-14 cycloalkyl.

18. The method according to claim 17 , wherein L 1 is a linker selected from the group consisting of

19. The method according to claim 18 , wherein L 1 is a linker selected from the group consisting of -cyclopropyl-C(O)—, —CH 2 C(O)—, —CH(CH 2 OH)CH 2 C(O)—, —CH 2 CH(OH)CH 2 CH 2 C(O)—, —OCH 2 C(O)—, —CH 2 SCH 2 C(O)—, —NHCH 2 C(O)—, —CH 2 CH 2 C(O)—, and —SCH 2 C(O)—.

20. The method according to claim 1 , wherein L 1 is a linker containing 1-10 heteroatoms, which is optionally substituted.

21. The method according to claim 20 , wherein L 1 is —O—, —S—, —NH—, or —N═N—.

22. The method according to claim 1 , wherein L 2 is absent.