regiospecific glycosylation was developed by using 6-O-tert-butyldiphenylsilyl N-acetylglucosamine derivatives 3 and 5 which bear two free hydroxyl groups as acceptors. The regiospecificity was attributed to the presence of the tert-butyldiphenylsilyl group at the O-6 position of the N-acetylglucosamine derivatives. Glycosylation of suitably protected galactoside donors 10-14 with acceptors 3 and 5 gave only
通过使用带有两个游离羟基的6 -O-叔丁基-二苯基甲
硅烷基N-乙酰基
葡糖胺衍
生物3和5,开发了一种用于区域特异性糖基化的有效方法。区域特异性归因于在N-乙酰基
葡糖胺衍
生物的O -6位上存在叔丁基二苯基甲
硅烷基。适当保护的半
乳糖苷供体10-14与受体3和5的糖基化以良好的产率仅产生β(1→4)连接的二糖15-19。二糖18的岩藻糖基化导致路易斯X(Le x)三糖21的高产。