AZABENZIMIDAZOLES AND THEIR USE AS AMPA RECEPTOR MODULATORS

1 . A compound of Formula (I):

or a pharmaceutically acceptable salt, N-oxide, or solvate thereof, wherein:

X is N;

R 1 is a member selected from the group consisting of:

H, —C 1-5 alkyl, —C 1-5 haloalkyl, —C 1-5 alkoxy, —(CH 2 ) 1-2 O-C 1-5 alkyl, —C(CH 3 ) 2 OCH 3 , —NH—C 1-5 alkyl, —C 3-8 cycloalkyl, —(CH 2 )—C 3-8 cycloalkyl, phenyl, and pyridinyl, wherein the —C 3-8 cycloalkyl, phenyl, and pyridinyl rings are each optionally substituted with 1 halo;

R 2 is selected from the group consisting of:

 wherein each R 2 is independently substituted with a member selected from the group consisting of: halo, —C 1-5 alkyl, —C 2-5 alkenyl, —CN, —OH, —CH═CHCH 2 OH, —(CH 2 ) 3 COH, —C(═O)O C 1-5 alkyl, and phenyl;

R 3 is selected from the group consisting of: H, halo, —C 1-5 alkyl, —C 1-5 haloalkyl, —C 1-5 alkoxy, —(CH 2 ) 1-3 OH, and —CH═CHCH 2 OH;

R 4 is selected from the group consisting of: H, halo, and —CF 3 ; and

R 5 is H.

2 . The compound of claim 1 or a pharmaceutically acceptable salt, N-oxide, or solvate thereof, wherein R 1 is selected from the group consisting of —C 1-5 alkyl, —C 1-5 haloalkyl, and —C 3-8 cycloalkyl, wherein the —C 3-8 cycloalkyl is optionally substituted with halo.

3 . The compound of claim 1 or a pharmaceutically acceptable salt, N-oxide, or solvate thereof, wherein R 4 is selected from the group consisting of H, fluoro, and —CF 3 .

4 . A pharmaceutical composition comprising:

the compound of claim 1 or a pharmaceutically acceptable salt, N-oxide or solvate thereof; and

at least one pharmaceutically acceptable excipient.

5 . A method of inhibiting TARP γ2-dependent AMPA receptor activity or TARP γ8-dependent AMPA receptor activity in a subject suffering from or diagnosed with a disease, disorder, or medical condition, wherein the method comprises administering to a subject in need of such treatment an effective amount of the compound of claim 1 , or a pharmaceutically acceptable salt, N-oxide or solvate thereof.

6 . The method of claim 5 , wherein the disease, disorder, or medical condition is selected from the group consisting of cerebral ischemia, head injury, spinal cord injury, Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis (ALS), Huntington's chorea, AIDS nervous disturbance, epilepsy, mental disorder, mobility disturbance, pain, spasticity, nervous disturbance by toxin in food, various neurodegenerative diseases, various mental diseases, chronic pain, migraine, cancer pain, diabetic neuropathy, encephalitis, acute disseminated encephalomyelitis, acute demyelinating polyneuropathy, Guillain Barre syndrome, chronic inflammatory demyelinating polyneuropathy, multiple sclerosis, Marchifava-Bignami disease, central pontine myelinolysis, Devic syndrome, Balo disease, HIV- or HTLV-myelopathy, progressive multifocal leucoencephalopathy, a secondary demyelinating disorder, CNS lupus erythematodes, polyarteritis nodosa, Sjogren syndrome, sarcoidosis, isolated cerebral vasculitis, schizophrenia, prodromal schizophrenia, a cognitive disorder, depression, anxiety disorders, anxious depression, and bipolar disorder.

7 . The method of claim 5 , wherein the disease, disorder, or medical condition is selected from the group consisting of cerebral ischemia, Alzheimer's disease, depression, post-traumatic stress disorder, anxiety disorders, anxious depression, epilepsy, schizophrenia, prodromal schizophrenia, bipolar disorder, and a cognitive disorder.

8 . A compound selected from the group consisting of:

tert-Butyl-5-(5-methyl-2-phenyl-imidazo[4,5-b]pyridin-3-yl)indazole-1-carboxylate;

3-(7-Bromo-1H-indazol-5-yl)-2-cyclobutyl-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Bromo-1H-indazol-5-yl)-2-isopropyl-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Bromo-1H-indazol-5-yl)-2,5-bis(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Phenyl-1H-indazol-5-yl)-2,5-bis(trifluoromethyl)-3H-imidazo[4,5-b]pyridine; 2,5-Bis(trifluoromethyl)-3-(7-vinyl-1H-indazol-5-yl)-3H-imidazo[4,5-b]pyridine;

3-(3-Fluoro-1H-indazol-5-yl)-2-isopropyl-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(4-Fluorophenyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 2-Ethoxy-3-(3-fluoro-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-Cyclopropyl-3-(3-fluoro-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 2-Isopropyl-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-isopropyl-imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2,5-bis(difluoromethyl)imidazo[4,5-b]pyridine; 2,5-Bis(difluoromethyl)-3-(7-methyl-1H-indazol-5-yl)imidazo[4,5-b]pyridine;

2-(2-Fluoro-4-pyridyl)-5-methyl-3-(7-methyl-1H-indazol-5-yl)imidazo[4,5-b]pyridine; 2-(2-Fluoro-4-pyridyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

(E)-3-(5-(2,5-Bis(trifluoromethyl)-3H-imidazo[4,5-b]pyridin-3-yl)-1H-indazol-7-yl)prop-2-en-1-ol;

3-(5-(2,5-Bis(trifluoromethyl)-3H-imidazo[4,5-b]pyridin-3-yl)-1H-indazol-7-yl)propan-1-ol; 3-(7-Propyl-1H-indazol-5-yl)-2,5-bis(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

(E)-3-(3-(7-Methyl-1H-indazol-5-yl)-2-(trifluoromethyl)-3H-imidazo[4,5-b]pyridin-5-yl)prop-2-en-1-ol;

3-(3-(7-Methyl-1H-indazol-5-yl)-2-(trifluoromethyl)-3H-imidazo[4,5-b]pyridin-5-yl)propan-1-ol;

3-(7-Methyl-1H-indazol-5-yl)-5-propyl-2-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-cyclopropyl-5-(difluoromethyl)imidazo[4,5-b]pyridine;

5-(Difluoromethyl)-2-(4-fluorophenyl)-3-(7-methyl-1H-indazol-5-yl)imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-5-(difluoromethyl)-2-(4-fluorophenyl)imidazo[4,5-b]pyridine; 3-(3-Fluoro-1H-indazol-5-yl)-2,5-bis(trifluoromethyl)imidazo[4,5-b]pyridine;

2-Methoxy-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 2-Ethoxy-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(3-Fluorocyclobutyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(3-Fluorocyclobutyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-(3-fluorocyclobutyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-(3-fluorocyclobutyl)-5-methyl-imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-(3-fluorocyclobutyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(1-Methoxy-1-methyl-ethyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(1,1-Difluoroethyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(1-Fluoro-1-methyl-ethyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-(1-fluoro-1-methyl-ethyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-Cyclopropyl-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine; (*R)-2-(1-Fluoroethyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

(*S)-2-(1-Fluoroethyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-(1-fluorocyclopropyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(1-Fluorocyclopropyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(2-Chloro-4-pyridyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(2-Bromo-4-pyridyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

5-(Difluoromethyl)-2-(2-fluoro-4-pyridyl)-3-(7-methyl-1H-indazol-5-yl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-5-(difluoromethyl)-2-(2-fluoro-4-pyridyl)imidazo[4,5-b]pyridine;

3-(4-Chloro-1H-indazol-6-yl)-2,5-bis(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-(1,1-difluoroethyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-5-methyl-2-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-5-(difluoromethyl)-2-isopropyl-imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2,5-bis(trifluoromethyl)imidazo[4,5-b]pyridine;

5-(Difluoromethyl)-2-isopropyl-3-(7-methyl-1H-indazol-5-yl)imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-5-(difluoromethyl)-2-methyl-imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-(difluoromethyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-(difluoromethyl)-5-methyl-imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-6-fluoro-2-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Bromo-1H-indazol-5-yl)-2-(difluoromethyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

Methyl 5-[2,5-bis(trifluoromethyl)imidazo[4,5-b]pyridin-3-yl]-1H-indazole-7-carboxylate; Methyl 5-[2-(difluoromethyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridin-3-yl]-1H-indazole-7-carboxylate;

2-(Difluoromethyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(4-Methyl-1H-indazol-6-yl)-2,5-bis(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Methyl-1H-indazol-5-yl)-2,5-bis(trifluoromethyl)imidazo[4,5-b]pyridine;

5-[2,5-Bis(trifluoromethyl)imidazo[4,5-b]pyridin-3-yl]-1H-indazole-3-carbonitrile;

5-[2-(Difluoromethyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridin-3-yl]-1H-indazol-3-ol; 3-(3-Bromo-1H-indazol-5-yl)-2-isopropyl-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-6-fluoro-2-isopropyl-imidazo[4,5-b]pyridine;

3-(7-Allyl-1H-indazol-5-yl)-2,5-bis(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

3-(7-(Prop-1-en-2-yl)-1H-indazol-5-yl)-2,5-bis(trifluoromethyl)-3H-imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-cyclopropyl-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-cyclobutyl-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 2-Isopropyl-3-(4-methyl-1H-indazol-6-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-methyl-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-ethyl-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-Ethyl-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-isopropyl-5-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Methyl-1H-indazol-5-yl)-2-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-Methyl-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-5-(difluoromethyl)-2-(trifluoromethyl)imidazo[4,5-b]pyridine; 5-(Difluoromethyl)-3-(7-methyl-1H-indazol-5-yl)-2-(trifluoromethyl)imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-(2-fluoro-4-pyridyl)-5-methyl-imidazo[4,5-b]pyridine;

3-(7-Bromo-1H-indazol-5-yl)-2-(2-fluoro-4-pyridyl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

(*R)-2-(sec-Butyl)-3-(7-chloro-1H-indazol-5-yl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

(*S)-2-(sec-Butyl)-3-(7-chloro-1H-indazol-5-yl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

(*R)-2-(sec-Butyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

(*S)-2-(sec-Butyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

(*R)-3-(7-Chloro-1H-indazol-5-yl)-2-(1-fluoroethyl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

(*S)-3-(7-Chloro-1H-indazol-5-yl)-2-(1-fluoroethyl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-(1,1-difluoroethyl)-5-methyl-3H-imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-(cyclopropylmethyl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-propyl-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-(methoxymethyl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2-isobutyl-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-5-methoxy-2-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine; 3-(7-Chloro-1H-indazol-5-yl)-2-(2,2,2-trifluoroethyl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

2-(1,1-Difluoropropyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

3-(7-Methyl-1H-indazol-5-yl)-5-(trifluoromethyl)-2-(3,3,3-trifluoropropyl)-3H-imidazo[4,5-b]pyridine;

3-(7-Chloro-1H-indazol-5-yl)-2,6-bis(trifluoromethyl)-3H-imidazo[4,5-b]pyridine;

2-(2-Chloro-4-pyridyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(2-Bromo-4-pyridyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine;

2-(2-[19F]fluoro-4-pyridyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine; and

2-(2-[18F]fluoro-4-pyridyl)-3-(7-methyl-1H-indazol-5-yl)-5-(trifluoromethyl)imidazo[4,5-b]pyridine; or a pharmaceutically acceptable salt thereof.

9 . The compound of claim 1 or a pharmaceutically acceptable salt, N-oxide, or solvate thereof, wherein R 2 is

substituted with halo or —C 1-5 alkyl.

10 . The compound of claim 1 or a pharmaceutically acceptable salt, N-oxide, or solvate thereof, wherein R 3 is selected from the group consisting of H, —C 1-5 alkyl, and —C 1-5 haloalkyl.

11 . The compound of claim 1 or a pharmaceutically acceptable salt, N-oxide, or solvate thereof, wherein R 4 is H.