N-iodosuccinimide (NIS) in the presence of an organic acid was found to be effective for the activation of fully acylated thioglycosides leading to 1,2-trans linked esters. On the other hand, NIS together with a catalytic amount of trifluoromethanesulfonic acid proved to be very convenient for the rapid, high-yielding and stereoselective (1,2-trans) glycosidation of esterified thioglycosides with glycosyl
发现在有机酸存在下,N-
碘琥珀
酰亚胺(NIS)可有效活化完全酰化的
硫代糖苷,从而生成1,2-反式连接的酯。另一方面,NIS与催化量的
三氟甲磺酸一起被证明对于用糖基受体对酯化的
硫糖苷进行快速,高产和立体选择性(1,2-反式)糖苷化非常方便。