Isothiazole-pyridine derivatives as modulators of HIF (hypoxia inducible factor) activity

1. A compound of Formula I or II:

wherein

q is 0 or 1;

R 1 is selected from the group consisting of hydrogen, deuterium, alkyl, and substituted alkyl;

R 2 is selected from the group consisting of hydrogen, hydroxyl, halo, cyano, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, alkoxy, substituted alkoxy, cycloalkyl, substituted cycloalkyl, cycloalkoxy, substituted cycloalkoxy, amino, substituted amino, aminoacyl, aryl, substituted aryl, aryloxy, substituted aryloxy, heteroaryl, substituted heteroaryl, heteroaryloxy, substituted heteroaryloxy, heterocyclyl, substituted heterocyclyl, heterocyclyloxy, substituted heterocyclyloxy, alkylthio, substituted alkylthio, cycloalkylthio, substituted cycloalkylthio, arylthio, substituted arylthio, heteroarylthio, substituted heteroarylthio, hetereocyclicthio, substituted heterocyclicthio, and acyl;

R 3 is selected from the group consisting of hydrogen, hydroxy, cyano, halo, nitro, acyl, amino, substituted amino, acylamino, sulfonyl, substituted sulfonyl, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, alkoxy, substituted alkoxy, aryl, substituted aryl, aryloxy, substituted aryloxy, alkylthio, substituted alkylthio, cycloalkylthio, substituted cycloalkylthio, arylthio, substituted arylthio, heteroarylthio, substituted heteroarylthio, hetereocyclicthio, substituted heterocyclicthio, heteroaryl, and substituted heteroaryl;

R 6 is selected from the group consisting of hydrogen, alkyl, and substituted alkyl;

R 7 is selected from the group consisting of hydroxy, alkoxy, substituted alkoxy, cycloalkoxy, substituted cycloalkoxy, aryloxy, substituted aryloxy, heteroaryloxy, substituted heteroaryloxy, heterocyclyloxy, substituted heterocyclyloxy, thio, alkylthio, substituted alkylthio, cycloalkylthio, substituted cycloalkylthio, arylthio, substituted arylthio, heteroarylthio, substituted heteroarylthio, hetereocyclicthio, substituted heterocyclicthio, amino, substituted amino, and acylamino; and

R 8 is selected from the group consisting of hydrogen, deuterium, and methyl;

or a pharmaceutically acceptable salt, single stereoisomer, mixture of stereoisomers, ester, or amide thereof.

2. The compound of claim 1 , wherein q is 0.

3. The compound of claim 1 , wherein R 1 is hydrogen or alkyl.

4. The compound of claim 1 , wherein R 6 and R 8 are hydrogen.

5. The compound of claim 1 , wherein R 2 is selected from the group consisting of hydrogen, hydroxyl, halo, cyano, alkyl, substituted alkyl, alkynyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, and acyl.

6. The compound of claim 1 , wherein R 3 is alkyl, substituted alkyl, aryl or substituted aryl.

7. The compound of claim 1 , wherein R 7 is hydroxy.

8. The compound of claim 1 , wherein

R 1 is hydrogen or alkyl;

R 6 and R 8 are hydrogen;

R 2 is selected from the group consisting of hydrogen, hydroxyl, halo, cyano, alkyl, substituted alkyl, alkynyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, and acyl;

R 3 is alkyl, substituted alkyl, aryl or substituted aryl; and

R 7 is hydroxy.

9. The compound of claim 1 , wherein

R 1 is hydrogen or methyl;

R 6 and R 8 are hydrogen;

R 2 is selected from the group consisting of hydrogen, hydroxyl, bromo, cyano, methyl, ethyl, benzyl, trifluoromethyl, ethynyl, phenyl, naphthalene-1-yl, 4-cyanophenyl, 4-fluorophenyl, 3-methoxyphenyl, 4-methoxyphenyl, 4-phenoxyphenyl, pyrid-2-yl, pyrid-3-yl, pyrid-4-yl, pyrazin-2-yl, 6-methoxypyridin-3-yl, 1-benzyl-1H-[1,2,3]triazol-4-yl, and acetyl;

R 3 is methyl, indol-1-ylmethyl, phenyl, 2-fluorophenyl, 4-fluorophenyl, or 4-chlorophenyl; and

R 7 is hydroxy.

10. A compound selected from the group consisting of {[7-(4-Fluoro-phenyl)-4-hydroxy-3-phenyl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[4-Hydroxy-7-(4-methoxy-phenyl)-3-phenyl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; [(4-Hydroxy-3-phenyl-7-pyridin-3-yl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(4-Hydroxy-3-phenyl-7-pyridin-2-yl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(4-Hydroxy-3-phenyl-7-pyridin-4-yl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; {[7-Ethynyl-3-(4-fluoro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[7-Bromo-3-(4-fluoro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[7-Cyano-3-(4-fluoro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Fluoro-phenyl)-4-hydroxy-7-methyl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Fluoro-phenyl)-4-hydroxy-7-phenyl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[7-(4-Cyano-phenyl)-3-(4-fluoro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Fluoro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Chloro-phenyl)-4-hydroxy-7-(4-methoxy-phenyl)-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Chloro-phenyl)-7-ethynyl-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Chloro-phenyl)-3-hydroxy-7-methyl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Chloro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Chloro-phenyl)-4-hydroxy-7-phenyl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; (R)-2-{[3-(4-Chloro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-propionic acid; (S)-2-{[3-(4-Chloro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-propionic acid; {[3-(4-Chloro-phenyl)-4-hydroxy-7-(3-methoxy-phenyl)-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Chloro-phenyl)-4-hydroxy-7-(6-methoxy-pyridin-3-yl)-isothiazolo[5,4-c]pyridine-5-carbonyl]amino}-acetic acid; {[7-Benzyl-3-(4-chloro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[7-(1-Benzyl-1H-[1,2,3]triazol-4-yl)-3-(4-chloro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Chloro-phenyl)-4-hydroxy-7-naphthalen-1-yl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[7-Acetyl-3-(4-chloro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(4-Chloro-phenyl)-4-hydroxy-7-trifluoromethyl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; [(4-Bromo-7-hydroxy-3-phenyl-isothiazolo[4,5-c]pyridine-6-carbonyl)-amino]-acetic acid; [(4-Hydroxy-3,7-dimethyl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(7-Hydroxy-3,4-dimethyl-isothiazolo[4,5-c]pyridine-6-carbonyl)-amino]-acetic acid; [(4-Hydroxy-3-methyl-7-phenyl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(7-Hydroxy-3-methyl-4-phenyl-isothiazolo[4,5-c]pyridine-6-carbonyl)-amino]-acetic acid; [(7-Hydroxy-3-methyl-isothiazolo[4,5-c]pyridine-6-carbonyl)-amino]-acetic acid; {[3-(2-Fluoro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(2-Fluoro-phenyl)-4-hydroxy-7-phenyl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(2-Fluoro-phenyl)-4-hydroxy-7-(4-phenoxy-phenyl)-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; {[3-(2-Fluoro-phenyl)-4-hydroxy-7-methyl-isothiazolo[5,4-c]pyridine-5-carbonyl]-amino}-acetic acid; [(4-Hydroxy-3-methyl-7-pyridin-3-yl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(4-Hydroxy-3-methyl-7-pyridin-2-yl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(7-Ethynyl-4-hydroxy-3-methyl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(4-Hydroxy-3-methyl-7-pyrazin-2-yl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]acetic acid; [(7-Hydroxy-3-methyl-4-pyrazin-2-yl-isothiazolo[4,5-c]pyridine-6-carbonyl)-amino]-acetic acid; [(7-Hydroxy-3-indol-1-ylmethyl-4-phenyl-isothiazolo[4,5-c]pyridine-6-carbonyl)-amino]-acetic acid; [(4-Hydroxy-3-phenyl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(4-Hydroxy-7-methyl-3-phenyl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(4-Hydroxy-3,7-diphenyl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; [(7-Ethyl-4-hydroxy-3-methyl-isothiazolo[5,4-c]pyridine-5-carbonyl)-amino]-acetic acid; and [(4-Ethyl-7-hydroxy-3-methyl-isothiazolo[4,5-c]pyridine-6-carbonyl)-amino]-acetic acid, or a pharmaceutically acceptable salt, single stereoisomer, mixture of stereoisomers, ester, or amide thereof.

11. A pharmaceutical composition comprising one or more compounds of claim 1 and a pharmaceutically acceptable excipient.