Ouverture régiospécifique d'un oxirane preparé á partir du d-xylose par des carbanions soufres
作者:A. Gateau-Olesker、L. Castellanos、F. Panne-Jacolot、J. Cleophax、S.D. Gero
DOI:10.1016/s0040-4020(01)98931-8
日期:1981.1
Two methods using the readily accessible D-xylose have been developed for the synthesis of epoxides 4 and 5. The oxirane 5 was considered as a good intermediate for the preparation of 3'-C-substituted nucleosides. The crucial step for the synthesis of 32 is the regiospecific opening of the epoxide 5 using two carbanions, derived from either dithiane or bis(phenylthio)methane, followed by desulphurisation