Patent ID: 8420661

Claim:
A compound having formula I-C1 wherein U ═C(R 5 )—; V is —CH═; W is ═CH—; R 5 is hydrogen, methyl or halogen; R 6 is hydrogen or lower alkyl; R 1 is phenyl or heteroaryl, each of which is optionally substituted by one or two substituents, selected from halogen, lower alkyl and lower alkoxy; R 2 and R 2′ are each independently hydrogen, lower alkyl, hydroxy, lower alkoxy, C 3 -C 6 -cycloalkyl, or CH 2 -lower alkoxy, or together with the carbon atom to which they are attached form a C 3 -C 6 -cycloalkyl group or a ring containing —CH 2 OCH 2 —; and R 3 and R 3′ are each independently hydrogen, lower alkyl, or CH 2 -lower alkoxy or together with the carbon atom to which they are attached form a C 3 -C 6 -cycloalkyl group; or R 3 and R 2 together with the carbon atom to which they are attached form a C 3-6 -cycloalkyl group or a ring containing —(CH 2 ) 2 OCH 2 —; or R 6 and R 2 together with the carbon atom and the nitrogen atom to which they are attached form a C 3-6 -cycloalkyl group; or a pharmaceutically acceptable acid addition salt, a racemic mixture, an enantiomer, an optical isomer or stereoisomer thereof.