Study of the stereoselectivity of 2-azido-2-deoxyglucosyl donors: protecting group effects
作者:George Ngoje、Zhitao Li
DOI:10.1039/c3ob26994a
日期:——
A series of tolyl 2-azido-2-deoxy-thio-glucoside donors with different combinations of protecting groups were prepared. These donors were used in glycosylation reactions to test the correlations between the stereoselectivity and the pattern of the protecting groups. Acetyl groups showed a position dependent stereo-directing effect. A remote participating mechanism is proposed to explain the observed results.
制备了一系列具有不同保护基组合的对甲苯基2-叠氮-2-脱氧硫代葡糖供体。这些供体被用于糖基化反应,以测试立体选择性与保护基模式之间的相关性。乙酰基表现出位置依赖性的立体导向效应。提出了一种远程参与机制,以解释观察到的结果。