Regio- and Stereoselective Organocatalyzed Relay Glycosylations To Synthesize 2-Amino-2-deoxy-1,3-dithioglycosides
作者:Yongyong Wan、Meimei Zhou、Liming Wang、Kexin Hu、Deyong Liu、Hui Liu、Jian-Song Sun、Jeroen D. C. Codée、Qingju Zhang
DOI:10.1021/acs.orglett.3c00859
日期:2023.5.26
novel methodology for the regio- and stereoselective convergent synthesis of 2-amino-2-deoxy-dithioglycosides via one-pot relay glycosylation of 3-O-acetyl-2-nitroglucal donors. This unique organo-catalysis relay glycosylation features excellent site- and stereoselectivity, good to excellent yields, mild reaction conditions, and broad substrate scope. 2-Amino-2-deoxy-glucosides/mannosides bearing 1,3-dithio-linkages
在此,我们描述了一种通过 3- O -acetyl-2-nitroglucal 供体的单锅接力糖基化来区域和立体选择性收敛合成 2-amino-2-deoxy-dithioglycosides 的新方法。这种独特的有机催化接力糖基化具有出色的位点选择性和立体选择性、良好的产率、温和的反应条件和广泛的底物范围。带有 1,3-二硫键的 2-氨基-2-脱氧-葡萄糖苷/甘露糖苷在逐步和一锅糖基化方案中从 3- O-乙酰基-2-硝基葡萄糖供体中有效地获得。E的二硫醇化 O 抗原。使用这种新开发的方法成功合成了大肠杆菌血清群 64。