Patent ID: 7956074

Claim:
A compound of formula I wherein R 1 is hydrogen, halogen, aryl, heterocyclyl, heteroaryl, cyano, lower alkyl, —(CH 2 ) n -cycloalkyl, —(CH 2 ) n —N(R) 2 , —(CH 2 ) n —O-lower alkyl or —(CH 2 ) n —OH; n is 0, 1 or 2 R is hydrogen or lower alkyl; R 2 is heteroaryl selected from the group consisting of quinolyl, indolyl, pyridinyl, triazolyl, benzotriazolyl, isoxazolyl, thiophenyl, benzoimidazolyl, dihydrobenzimidazolyl-2-one, imidazolyl, oxazolyl, oxadiazolyl and pyrazinyl or is heterocyclyl, each of which is optionally substituted by one or more substituents, selected from the group consisting of halogen, cyano, nitro, lower alkyl, lower alkoxy, lower alkoxy substituted by halogen, lower alkyl substituted by halogen, C(O)O-lower alkyl, lower alkylsulfonyl, —NR a R b , —C(O)—NR a R b , —C(O)-heterocyclyl, benzyloxy, heterocyclyl optionally substituted by hydroxy, halogen or lower alkyl, or is heteroaryl optionally substituted by lower alkyl; R a and R b are independently hydrogen, lower alkylsulfonyl, —C(O)H, —(CH 2 ) n —N(R) 2 , —(CH 2 ) n —O-lower alkyl, —(CH 2 ) n —S-lower alkyl, —(CH 2 ) n —S(O) 2 -lower alkyl, heteroarylsulfonyl, lower alkyl, —(CH 2 ) n -heterocyclyl, optionally substituted by lower alkyl, or is —(CH 2 ) n -cycloalkyl, —(CH 2 ) n -heteroaryl, —(CH 2 ) n —OH, —(CO)—R′, wherein R′ is lower alkyl, cycloalkyl or heteroaryl; R 3 is aryl or heteroaryl, which are optionally substituted by halogen or lower alkyl substituted by halogen; or a pharmaceutically acceptable acid addition salt thereof.