Synthesis and anti-hepatitis C virus (HCV) activity of 3′-C-substituted-methyl pyrimidine and purine nucleosides
摘要:
On the basis of potent anti-hepatitis C virus (HCV) activity of 2'-C-hydroxymethyladenosine, 3'-C-substituted-methyl-ribofuranosyl pyrimidine and purine nucleosides were designed and synthesized from D-xylose. Among compounds tested, all adenine analogues, 4a, 4d, and 4g showed significant anti-HCV activity in a replicon-based cell assay irrespective of the substituent (Y = OH, N-3, or F) at the 3'-C-substituted methyl position, among which 4g (Y = N3) was the most potent, but it is also cytotoxic. This study guarantees the 3'-C-substituted-methyl nucleoside serves as a new template for the development of new anti-HCV agents. (C) 2010 Elsevier Ltd. All rights reserved.
New Ruthenium-Based Protocol for Cleavage of Terminal Olefins to Primary Alcohols: Improved Synthesis of a Bicyclic Nucleoside
作者:Pawan K. Sharma、Poul Nielsen
DOI:10.1021/jo0491861
日期:2004.8.1
A new protocol for the oxidative cleavage of terminal alkenes to give exclusively primary alcohols in high yields is introduced. The protocol is based on RuO4-mediated dihydroxylation, NaIO4-mediated diol cleavage, and NaBH4-mediated reduction, but the introduction of a reducing step before the diol cleavage removes the formation of byproducts and improves the yield significantly. The new protocol