Palladium-Catalyzed Improved Regio- and Stereoselective O-Glycosylation of D-Glucal-Derived β- and α-Vinyl Oxiranes
作者:Y. Suman Reddy、Rima Lahiri、Yashwant D. Vankar
DOI:10.1002/ejoc.201200242
日期:2012.9
3-unsaturated O-glycosides in good to excellent yields within five minutes. The above reaction has also been utilized in the synthesis of 2,3-unsaturated trisaccharides, which are potential precursors of fully oxygenated, deoxy and dideoxy sugars.
D-葡萄糖衍生的乙烯基环氧乙烷作为优异的糖基供体的 Pd0 催化糖基化已经以区域和立体选择性方式完成。各种糖基受体与乙烯基环氧乙烷 1a 和 1b 反应后,在五分钟内以良好到极好的收率产生相应的 2,3-不饱和 O-糖苷。上述反应也已用于合成 2,3-不饱和三糖,它们是完全氧化、脱氧和双脱氧糖的潜在前体。