Novel and convenient dehydrative glycosidations of 1-hydroxy glycosyl donors have been developed. Several O-benzylated 1-hydroxy sugars are effectively cross-coupled with a variety of alcohols to give the corresponding O-glycosides in high yields with good α-stereoselectivities by using the heteropoly acid, H4SiW12O40.
我们开发出了新颖便捷的 1-羟基糖基给体脱
水糖苷化反应。通过使用杂多酸 H4SiW12O40,几种 O-苄基化的 1-羟基糖与多种醇有效地交叉偶联,得到相应的 O-糖苷,产量高,δ-立体选择性好。