Stereospecific Palladium-Catalyzed Direct Glycosylation of Oximes: Access to N–O-Linked Glycosides
作者:Yujuan Wang、Yiyang Cheng、Lei Zhong、Shuhui Lei、Yun He、Yuanwei Dai
DOI:10.1021/acs.orglett.3c01484
日期:2023.6.9
palladium-catalyzed glycosylation between 3,4-O-carbonate glycals and acid-labile oximes is disclosed. This approach features broad substrate scope, high functional group tolerance, and easy scalability, delivering glycosyl oximes in excellent yields with exclusive β-selectivity and retention of Z/E geometries. The power of this method is demonstrated by a set of site-selective transformations of glycosylation products
公开了3,4- O-碳酸酯糖醛和酸不稳定肟之间的高效钯催化糖基化。这种方法具有广泛的底物范围、高官能团耐受性和易于扩展性,以优异的产量提供糖基肟,具有独特的 β-选择性和Z / E几何形状的保留。通过一组糖基化产物的位点选择性转化和生物活性分子的后期糖多样化证明了这种方法的威力。总的来说,我们的策略提供了一个有效的工具包,可以轻松获取有价值的 N-O-连接糖苷。