The compounds of formula I wherein R
1
, R
2
, R
3
, R
4
and R
5
are defined herein, are useful as inhibitors of the hepatitis C virus NS3 protease The invention further relates to azalactone compounds of the formula (II) which can be reacted with an amide anion to produce the HCV NS3 protease inhibitors of formula (I)
式I中,R1、R2、R3、R4和R5如本文所定义的化合物,可用作丙型肝炎病毒
NS3蛋白酶的
抑制剂。本发明还涉及式(II)的
氮杂环酮化合物,其可与酰胺负离子反应,制备出式(I)的HCV 蛋白酶抑制剂。