Patent ID: 7696222

Claim:
A compound of the formula I: and pharmaceutically acceptable salts thereof, wherein: n is 1 or 2; Ar is aryl or heteroaryl each optionally substituted with 1 to 4 groups independently selected from R c ; X is selected from —C(R a )(R b )—, —C(R a )(R b )—C(R a )(R b )—, —C(R a )═C(R a )—, —OC(R a )(R b )—, and —SC(R a )(R b )—; R 1 is selected from H, halogen and C 1-6 alkyl; R 2 is selected from H and C 1-6 alkyl; R 3 is selected from H, halogen, C 1-6 alkyl, OC 1-6 alkyl, SC 1-6 6alkyl, S(O) n C 1-6 alkyl, CN, aryl and heteroaryl; R a and R b are independently H, halogen, aryl, heteroaryl, C 1-6 alkyl or haloC 1-6 alkyl; or R a and R b together with the carbon atom to which they are both attached complete a C 3-6 cycloalkyl ring; or R a and R b together with the adjacent carbon atoms to which they are attached complete a C 3-6 cycloalkyl ring; and R c is selected from halogen, CN, C 1-6 alkoxy, C 1-6 alkyl, haloC 1-6 alkoxy, and haloC 1-6 alkyl.