作者:Lydie Dheilly、Catherine Lièvre、Catherine Fréchou、Gilles Demailly
DOI:10.1016/s0040-4039(00)73808-1
日期:1993.9
arsenic ylides with pyranose and furanose carbohydrates mainly leads to E-olefinic derivatives. Cyclisation of the olefinic derivatives obtained from 2,3,4,6-tetra-O-benzyl-D-glucose and D-galactose, promoted by ZnBr2, gives C-glycosyl compounds with high stereoselectivity. One the other hand, reaction of the corresponding arsonium salt, in presence of zinc, with a furanose derivative gives directly and
砷化物与吡喃糖和呋喃糖碳水化合物的反应主要产生E-烯烃衍生物。由ZnBr 2促进的由2,3,4,6-四-O-苄基-D-葡萄糖和D-半乳糖获得的烯烃衍生物的环化,得到具有高立体选择性的C-糖基化合物。另一方面,相应的砷盐在锌的存在下与呋喃糖衍生物的反应直接和立体选择性地产生β-C-糖基化合物。