作者:Horst Kunz、Sebastian Götze、Roland Fitzner
DOI:10.1055/s-0029-1218356
日期:2009.12
Glycosylation of alcohols containing acid-sensitive groups, as tor example 1,2-5,6-di-O-isopropylidene-glucofuranose, Fmoc-threonine tert-butyl ester or famesol, is achieved using glycosyl trichloroacetimidates activated by gold(I) chloride (5―10 mol%). While glycosylation with 2-O-acyl protected glycosyl donors proceeds with 1,2-trans-selectivity, non-neighboring group active glycosyldonors give mixtures
含有酸敏感基团的醇,例如 1,2-5,6-二-O-异亚丙基-呋喃糖、Fmoc-苏氨酸叔丁酯或法素醇的糖基化是使用由氯化金 (I) 活化的糖基三氯乙酰亚胺实现的(5-10 mol%)。虽然与 2-O-酰基保护的糖基供体的糖基化以 1,2-反式选择性进行,但非相邻基团活性糖基供体产生异头糖苷或 α-糖苷的混合物,这取决于它们的结构和糖基受体的反应性。