Stereoselective Synthesis of
<i>C</i>
‐Vinyl Glycosides via Palladium‐Catalyzed C−H Glycosylation of Alkenes
作者:Qikai Sun、Huixing Zhang、Quanquan Wang、Tianjiao Qiao、Gang He、Gong Chen
DOI:10.1002/anie.202104430
日期:2021.9
carbohydrates and pose a unique synthetic challenge. A new strategy has been developed for stereoselective synthesis of C-vinyl glycosides via Pd-catalyzed directed C−H glycosylation of alkenes with glycosyl chloride donors using an easily removable bidentate auxiliary. Both the γ C−H bond of allylamines and the δ C−H bond of homoallyl amine substrates can be glycosylated in high efficiency and with excellent
C-乙烯基糖苷是一类重要的碳水化合物,对合成提出了独特的挑战。已经开发了一种新的策略,通过 Pd 催化的烯烃与糖基氯供体的 C-H 糖基化,使用易于去除的双齿助剂,立体选择性合成C-乙烯基糖苷。烯丙胺的 γ CH 键和高烯丙胺底物的 δ CH 键都可以高效糖基化,并具有出色的区域和立体选择性。得到的C-乙烯基糖苷可以进一步转化为多种具有高立体特异性的C-烷基糖苷。这些反应提供了一种广泛适用的方法来简化复杂C的合成-来自易于获得的起始材料的乙烯基糖苷。