Patent ID: 8404679

Claim:
A compound of formula IA wherein R 1 is hydrogen or halogen; n is 1 or 2; R 2 is lower alkyl ; R 3 is R 6 is hydrogen, lower alkyl or hydroxy; R 7 ′ is hydrogen, lower alkyl, S(O) 2 -lower alkyl, —C(O)-lower alkyl, —C(O)CH 2 —O-lower alkyl, —CH 2 CN, —C(O)CN, —C(O)CH 2 CN, —C(O)-cycloalkyl wherein the cycloalkyl group is optionally substituted by cyano, lower alkyl, one or two halogen atoms, ═O or amino, or is —C(O)O-lower alkyl or —CH 2 O-lower alkyl; or Ar is aryl- or heteroaryl, wherein the rings of the aryl or heteroaryl group are optionally substituted by one or two substituents R″; and R″ is selected from hydrogen, halogen, lower alkyl, lower alkyl substituted by halogen, lower alkoxy, lower alkoxy substituted by halogen, —O-CH 2 -cycloalkyl, —NR 4 R 5 , —CN, —CH(CH 3 )CN, —CH 2 O-lower alkyl and pyrrolyl; R 4 and R 5 are each independently hydrogen , C(O)CF 3 , or lower alkyl; or a pharmaceutically active salt, racemic mixture, enantiomer, optical isomer or tautomeric form thereof.