| abstract |
Disclosed herein are compounds of formula (1): n n n wherein R 1 is hydroxy or NHSO 2 R 1A wherein R 1A is (C 1-8 )alkyl, (C 3-7 )cycloalkyl or {(C 1-6 )alkyl-(C 3-7 )cycloalkyl}, which are all optionally substituted from 1 to 3 times with halo, cyano, nitro, O—(C 1-6 )alkyl, amido, amino or phenyl, or R 1A is C 6 or C 10 aryl which is optionally substituted from 1 to 3 times with halo, cyano, nitro, (C 1-6 )alkyl, O—(C 1-6 ) alkyl, amido, amino or phenyl; R 2 is (C 4-6 )cycloalkyl; R 3 is t-btuyl or (C 5-6 ) cycloalkyl and R 4 is (C 4-6 )cycloalkyl; or a pharmaceutically acceptable salt thereof. The compounds are useful as inhibitors of HCV NS3 protease. |