Synthesis of 3‘-Fluoro-2‘,3‘-dideoxy-2‘,3‘-didehydro-4‘-ethynyl-<scp>d</scp>- and -<scp>l</scp>-furanosyl Nucleosides
作者:Xin Chen、Wen Zhou、Raymond F. Schinazi、Chung K. Chu
DOI:10.1021/jo049597h
日期:2004.9.1
An efficient procedure has been developed for the synthesis of 3‘-fluoro-2‘,3‘-dideoxy-2‘,3‘-didehydro-4‘-ethynyl d- and l-furanosyl nucleosides (1 and 2) starting from 2,3-O-isopropylidene-d-glyceraldehyde. The key intermediate 1-O-benzoyl-3E-fluoro-3,4-unsaturated-5,6-di(tert-butyldimethylsilyloxy)-2-hexanone 8 was obtained in nine steps with the overall yield of 22%. The α,β-unsaturated ketone 8