Efficient Synthesis of Methylene <i>exo</i>-Glycals: Another Use of Glycosylthiomethyl Chlorides
作者:Xiangming Zhu、Ying Jin、John Wickham
DOI:10.1021/jo0623843
日期:2007.3.1
A new approach to the synthesis of methylene exo-glycals is described. Oxidation of glycosylthiolmethyl chloride (GTM-Cl) with mCPBA afforded the corresponding glycosylchloromethyl sulfone in almost quantitative yield, which underwent KOtBu-induced Ramberg−Bäcklund rearrangement to furnish the desired methylene exo-glycal in excellent yield.