Syntheses of the 3- and 4-thio analogues of 4-nitrophenyl 2-acetamido-2-deoxy-β-d-gluco- and galactopyranoside
作者:Hong-Ming Chen、Stephen G. Withers
DOI:10.1016/j.carres.2007.05.023
日期:2007.11
and 4-thio analogues of the two principal 2-acetamido-2-deoxy-hexoses found in living systems, GlcNAc and GalNAc, are described. While synthesis of the 4-thio analogues could be achieved via nucleophilic displacements of sulfonate derivatives with thioacetate, problems with neighbouring group acetamido participation necessitated the use of sulfamidate intermediates for the 3-thio analogues. These 3-
描述了在生命系统中发现的两个主要的2-乙酰氨基-2-脱氧己糖的3-硫和4-硫类似物的4-硝基苯基β-糖苷的合成,GlcNAc和GalNAc。虽然可以通过亲核取代磺酸衍生物与硫代乙酸酯来合成4-硫代类似物,但相邻基团乙酰胺基参与的问题使得必须将氨基磺酸酯中间体用于3-硫代类似物。这些3-和4-硫代类似物用于糖-氨基聚糖,糖蛋白和糖脂中存在的结构的硫代-寡糖类似物的化学-酶促合成中。