Patent ID: 8338367

Claim:
A compound of the formula (I): wherein: R 1 is C 1 -C 5 alkyl optionally substituted with 1-2 substituents chosen from hydroxyl, C 1 -C 5 alkoxy, aryl and heteroaryl; R 2 is C 1 -C 5 alkyl, carbocycle, heterocycle or heteroaryl, each optionally independently substituted with 1-2 substituents chosen from amino, hydroxyl and C 1 -C 5 alkoxy; R 3 is a bond, —(CH 2 ) n , —C(O)—, O, NH or —S(O) m —; R 4 is hydrogen, C 1 -C 5 alkyl, amino, alkylamino, dialkylamino, heterocyclyl or heteroaryl, each optionally independently substituted with 1-3 substituents chosen from C 1 -C 5 alkyl, acyl, halogen, hydroxyl, oxo and C 1 -C 5 alkoxy; W is N, O or CH wherein CH is optionally substituted with halogen, C 1 -C 5 alkyl, C 1 -C 5 alkoxy or —C(O)—NH 2 wherein the nitrogen atom is optionally mono or di substituted with a C 1 -C 3 alkyl group; X is N or CH; Ar is a heteroaryl ring chosen from furanyl, thiazolyl, pyrazolyl, imidazolyl, pyrrolyl, pyridinyl, pyrimidinyl, pyridazinyl and quinolinyl; each m, n is 0-2; wherein each R 1 -R 4 is optionally partially or fully halogenated; or a pharmaceutically acceptable salt thereof.