Iodonium ion promoted reactions at the anomeric centre. II An efficient thioglycoside mediated approach toward the formation of 1,2-trans linked glycosides and glycosidic esters
作者:G.H. Veeneman、S.H. van Leeuwen、J.H. van Boom
DOI:10.1016/s0040-4039(00)88799-7
日期:1990.1
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。