An enantioselective synthesis of carbafuranose sugars based on a linchpin carbacyclisation approach
摘要:
Enantiopure carbafuranose derivatives were synthesised via a linchpin carbacyclisation process starting from 1,4-bisepoxides. Both 2-deoxy and 2-deoxy-6-hydroxycarbafuranose derivatives were obtained, which were converted to suitably protected precursors for carbanucleoside synthesis. (C) 2009 Elsevier Ltd. All rights reserved.
A Linchpin Carbacyclization Approach for the Synthesis of Carbanucleosides
作者:Leo M. H. Leung、Vicky Gibson、Bruno Linclau
DOI:10.1021/jo801848h
日期:2008.12.5
A convenientsynthesis of carbanucleosides, with both enantiomers equally accessible, is reported. The key step is a tandem linchpin cyclization process to give access to substituted carbafuranose derivatives having the correct relative stereochemistry for subsequent nucleobase introduction with inversion of configuration at C1. This was illustrated by the synthesis of 2',3'-dideoxycarbathymidine via