A chemoselective strategy for oligosaccharide-peptide ligation is described in which alpha-thio analogues of mucin-related glycoconjugates can be readily accessed through site-selective conjugate addition of complex oligosaccharide thiolates to dehydroalanine-containing peptides. The efficiency of the ligation is highlighted by the rapid convergent assembly of thio-isosteres of the four tumor-associated
描述了用于
寡糖-肽连接的
化学选择性策略,其中可以通过将复合
寡糖硫醇盐向含脱氢丙
氨酸的肽进行位点选择性共轭加成而容易地获得粘蛋白相关糖缀合物的α-
硫类似物。四个肿瘤相关
碳水化合物抗原T(N),T,ST(N)和2,6-ST作为一对非对映异构体的
硫代-等位素的快速会聚装配突显了连接的效率新形成的半胱
氨酸立体中心。该方法以高产率进行并且完全保留了α-异头物构型。