Convenient access to isoindolinones via carbamoyl radical cyclization. Synthesis of cichorine and 4-hydroxyisoindolin-1-one natural products
摘要:
An efficient and convenient access to 2-tert-butylisoindolin-1-ones via an oxidative radical cyclization process from stable carbamoylxanthates, derived from secondary tert-butylamines, is described. The proposed mechanism for this transformation involves, the generation of a carbamoyl radical, its cyclization to the aromatic system, and the dilauroyl peroxide (DLP) mediated rearomatization to generate the isoindolinone ring system. Additionally, the syntheses of cichorine and 4-hydroxyisoindolin-1-one natural products were carried out to underscore the synthetic potential of this xanthate-based carbamoyl radical-oxidative cyclization. (C) 2011 Elsevier Ltd. All rights reserved.
Quinoxalinyl macrocyclic hepatitis C serine protease inhibitors
申请人:Nakajima Suanne
公开号:US20070060510A1
公开(公告)日:2007-03-15
The present invention relates to compounds of Formula I or II, or a pharmaceutically acceptable salt, ester, or prodrug, thereof:
which inhibit serine protease activity, particularly the activity of hepatitis C virus (HCV) NS3-NS4A protease. Consequently, the compounds of the present invention interfere with the life cycle of the hepatitis C virus and are also useful as antiviral agents. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject suffering from HCV infection. The invention also relates to methods of treating an HCV infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention.
The scope and limitations of carboxamide-induced .beta.-directed metalation of 2-substituted furan, thiophene, and 1-methylpyrrole derivatives. Application of the method to syntheses of 2,3-disubstituted thiophenes and furans
作者:Andrew J. Carpenter、Derek J. Chadwick
DOI:10.1021/jo00222a032
日期:1985.11
CARPENTER, A. J.;CHADWICK, D. J., J. ORG. CHEM., 1985, 50, N 22, 4362-4368