Fluoroboronic acid adsorbed on silica gel (HBF4ËSiO2) catalyzes the Ferrier rearrangement of per-O-acetylated glycals with alcohols and sulfonamides to give 2,3-unsaturated O- and N-glycosides in good to excellent yield and with high α-stereoselectivity.
氟硼酸吸附于
硅胶上(
HBF4⋅SiO2)催化佛雷尔重排反应,在醇和磺酰胺作用下生成2,3-不饱和的O-和N-糖苷,产率优良至极佳,并具有高度的α-立体选择性。