Novel potent inhibitors of hepatitis C virus (HCV) NS3 protease with cyclic sulfonyl P3 cappings
作者:Kevin X. Chen、Bancha Vibulbhan、Weiying Yang、Latha G. Nair、Xiao Tong、Kuo-Chi Cheng、F. George Njoroge
DOI:10.1016/j.bmcl.2008.12.111
日期:2009.2
Extensive SAR studies of the P3 capping group led to the discovery of a series of potent inhibitors with sultam and cyclic sulfonyl urea moieties as the P3 capping. The bicyclic thiophene-sultam or phenyl- sultam cappings were selected for further SAR development. Modi. cation at the P3 side chain determined that the tert-butyl group was the best choice at that position. Optimization of P1 residue significantly improved potency and selectivity. The combination of optimal moieties at all positions led to the discovery of compound 33. This compound had the best overall pro. le in potency and PK profile: excellent K-i* of 5.3 nM and activity in replicon (EC90) of 80 nM, extremely high selectivity of 6100, and a good rat PO AUC of 1.43 mu Mh. (C) 2009 Elsevier Ltd. All rights reserved.