Discovery and Structure−Activity Relationship of P1−P3 Ketoamide Derived Macrocyclic Inhibitors of Hepatitis C Virus NS3 Protease
摘要:
Hepatitis C virus (HCV) infection is the major cause of chronic liver disease, leading to cirrhosis and hepatocellular carcinoma, and affects more than 200 million people worldwide. Although combination therapy of interferon-alpha and ribavirin is reasonably successful in treating majority of genotypes, its efficacy against the predominant genotype (genotype 1) is moderate at best, with only about 40% of the patients showing sustained virological response. Herein, the SAR leading to the discovery of a series of ketoamide derived P-1-P-3 macrocyclic inhibitors that are more potent than the first generation clinical candidate, boceprevir (1, Sch 503034), is discussed. The optimization of these macrocyclic inhibitors identified a P-3 imide capped analogue 52 that was 20 times more potent than 1 and demonstrated good oral pharmacokinetics in rats. X-ray structure of 52 bound to NS3 protease and biological data are also discussed.
Acylsulfonamide compounds as inhibitors of hepatitis C virus NS3 serine protease
申请人:Sannigrahi Mousumi
公开号:US20060046956A1
公开(公告)日:2006-03-02
The present invention discloses novel compounds which have HCV protease inhibitory activity as well as methods for preparing such compounds. In another embodiment, the invention discloses pharmaceutical compositions comprising such compounds as well as methods of using them to treat disorders associated with the HCV protease.
Synthesis and antiviral activity of HCV NS3/4A peptidomimetic boronic acid inhibitors
作者:Amogh Boloor、Denise Hanway、Maria Joshi、David T. Winn、Gabriel Mendez、Marlena Walls、Ping Wei、Fuxin Qian、Xiaoli Zhang、Yuliang Zhang、Michael E. Hepperle、Xinqiang Li、David A. Campbell、Juan M. Betancort
DOI:10.1016/j.bmcl.2009.08.017
日期:2009.10
A new series of NS3/4A protease boronic acid inhibitors is described. The compounds show good biochemical potency and cellular activity. The peptidomimetic inhibitors were evaluated against proteases from different HCV genotypes and clinically relevant NS3/4A mutants. Compound 28 displayed subnanomolar to single digit nanomolar potencies in the enzymatic assays and an EC50 of 25 nM in the replicon cell-based assay. (C) 2009 Elsevier Ltd. All rights reserved.
Potent ketoamide inhibitors of HCV NS3 protease derived from quaternized P1 groups
作者:Srikanth Venkatraman、Francisco Velazquez、Wanli Wu、Melissa Blackman、Vincent Madison、F. George Njoroge
DOI:10.1016/j.bmcl.2010.02.051
日期:2010.4
Blood borne hepatitis C infections are the primary cause for liver cirrhosis and hepatocellular carcinoma. HCV NS3 protease, a pivotal enzyme in the replication cycle of HCV virus has been the primary target for development of new drug candidates. Boceprevir and telaprevir are two novel ketoamide derived inhibitors that are currently undergoing phase-III clinical trials. These inhibitors include ketoamide functionality as serine trap and have an acidic alpha-ketoamide center that undergoes epimerization under physiological conditions. Our initial attempts to arrest this epimerization by introducing quaternary amino acids at P-1 had resulted in significantly diminished activity. In this manuscript we describe alpha quaternized P-1 group that result in potent inhibitors in the enzyme assay and demonstrate cellular activity comparable to boceprevir. (C) 2010 Elsevier Ltd. All rights reserved.
Potent aza-peptide derived inhibitors of HCV NS3 protease
作者:Srikanth Venkatraman、Wanli Wu、Neng-Yang Shih、F. George Njoroge
DOI:10.1016/j.bmcl.2009.06.060
日期:2009.8
Chronic hepatitis C infection is the primary cause for cirrhosis of the liver and hepatocellular carcinoma leading to liver failure and transplantation. The etiological agent hepatitis C virus produces a single positive strand RNA that is processed further with the help of NS3 serine protease to produce mature virus. Inhibition of this protease can potentially be used to develop drugs for HCV infections. Boceprevir is a ketoamide derived novel inhibitor of HCV NS3 protease that has been progressed to clinical trials and proven to be efficacious in humans. Herein, we report our efforts in identifying an aza-peptide derivative as a potential second generation compound, that lacks electrophilic ketoamide group and are potent in enzyme and replicon assay. (C) 2009 Published by Elsevier Ltd.
3,4-(CYCLOPENTYL)-FUSED PROLINE COMPOUNDS AS INHIBITORS OF HEPATITIS C VIRUS NS3 SERINE PROTEASE