Unexpected intermolecular aglycon transfer in chemoselective glycosylations between activated thioglycosyl donors and deactivated thioglycosyl acceptors could be avoided by employing a glycosyl acceptor that has a bulky anomeric dicyclohexylmethanethio group. The methodology was applied to the synthesis of a protected fragment of an oligosaccharide released from the jelly coat glycoprotein of X. leavis
通过使用具有庞大的异头二环己基甲
硫基的糖基受体,可以避免活化的
硫糖基供体和失活的
硫糖基受体之间在
化学选择性糖基化过程中发生意外的分子间糖苷配基转移。该方法适用于从X.leavis的果冻外壳糖蛋白释放的保护
寡糖片段的合成。