A new glycosylation method using glycosyl donors substituted by enol ether as a leaving group
作者:Yumiko Osa、Kazuyoshi Takeda、Tomoko Sato、Eisuke Kaji、Yoshihisa Mizuno、Hiroaki Takayanagi
DOI:10.1016/s0040-4039(98)02703-8
日期:1999.2
Glycosyl donors having a leaving group of enol ether were easily prepared by the addition of the anomeric hydroxyl group of pyranose derivatives to α,β-unsaturated alkynic acid esters or -ketone. These glycosyl donors were selectively glycosidated with several glycosyl acceptors in the presence of trimethylsilyl triflate (TMSOTf). A fucosyl donor was also applied in a similar synthesis.
通过将吡喃糖衍生物的异头羟基加到α,β-不饱和炔酸酯或-酮上,可以容易地制备具有烯醇醚离去基团的糖基供体。在三甲基甲硅烷基三氟甲磺酸酯(TMSOTf)存在下,这些糖基供体被几个糖基受体选择性糖基化。岩藻糖基供体也被用于类似的合成中。