Allyl Protecting Group Mediated Intramolecular Aglycon Delivery (IAD) of Glycosyl Fluorides
作者:Ian Cumpstey、Antony J. Fairbanks、Alison J. Redgrave
DOI:10.1007/s007060200020
日期:2002.4.1
sequence of allyl isomerization, N-iodosuccinimide mediated tethering, and intramolecular aglycon delivery (IAD). Fluoride is advantageous as an anomeric leaving group since extended reaction times can be employed to tether hindered aglycon alcohols without competitive anomeric activation. Tin(II) chloride mediated intramolecular glycosylation furnishes the desired α-glucosides and β-mannosides in an
2-O-烯丙基保护的葡萄糖基和甘露糖基氟化物的 立体特异性1,2- 顺式 糖基化可以 通过 一系列烯丙基异构化,N-碘代琥珀酰亚胺介导的束缚和分子内糖苷配基递送(IAD)实现。氟化物作为异头离去基团是有利的,因为延长的反应时间可用于束缚受阻的糖苷配基醇而没有竞争性的异头活化。氯化锡(II)介导的分子内糖基化反应以完全立体选择性的方式提供了所需的α-葡萄糖苷和β-甘露糖苷。