An Efficient and General Synthesis of 5′-Esters of 2′,3′-Didehydro-2′,3′-dideoxynucleosides: A Facile Opening of 2′,3′-Orthoacetates of Ribonucleosides Followed by Reductive Elimination of the Halogenoacetates

Ratnakar R. Talekar; Paul L. Coe; Richard T. Walker

doi:10.1055/s-1993-25853

Synthesis 1993; 1993(3): 303-306
DOI: 10.1055/s-1993-25853

paper

© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved. This journal, including all individual contributions and illustrations published therein, is legally protected by copyright for the duration of the copyright period. Any use, exploitation or commercialization outside the narrow limits set by copyright legislation, without the publisher's consent, is illegal and liable to criminal prosecution. This applies in particular to photostat reproduction, copying, cyclostyling, mimeographing or duplication of any kind, translating, preparation of microfilms, and electronic data processing and storage.

An Efficient and General Synthesis of 5′-Esters of 2′,3′-Didehydro-2′,3′-dideoxynucleosides: A Facile Opening of 2′,3′-Orthoacetates of Ribonucleosides Followed by Reductive Elimination of the Halogenoacetates

Ratnakar R. Talekar^* , Paul L. Coe, Richard T. Walker

^*School of Chemistry, University of Birmingham Edgbaston, Birmingham, B15 2TT, England

Abstract

als PDF herunterladen Alle Artikel dieser Rubrik

A three-step reaction sequence starting from a ribonucleoside to give the corresponding 5′-O-acyl-2′,3′-didehydro-2′,3′-dideoxynucleoside is described. The key intermediate is the bromoacetate, made by reaction of the 2′,3′-methoxyethylidene nucleoside with acetyl bromide. Reductive elimination of the bromoacetate using a zinc-copper couple furnishes the desired compounds in good overall yield.

PDF (319 kb)