The N-glycopeptides alpha-Glc-(1----Asn and alpha-Glc-(1----6)-beta-Glc- (1----6)-alpha-Glc-(1----Asn have been synthesized efficiently from pent-4-enyl D-glucopyranoside derivatives. The methodology illustrates (a) a novel route for formation of the N-alpha-D-glucosyl-asparagine link, and (b) stereo-controlled construction of the glycan backbone alpha-Glc-(1----6)-beta-Glc-(1----6)-Glc in which the
N-糖肽alpha-Glc-(1 ---- Asn和alpha-Glc-(1 ---- 6)-beta-Glc-(1 ---- 6)-alpha-Glc-(1- --Asn是由戊-4-烯基
D-吡喃葡萄糖苷衍
生物有效合成的,该方法说明了(a)形成N-α-
D-葡萄糖基-天冬酰胺连接的新途径,以及(b)立体控制结构聚糖骨架α-Glc-(1 ---- 6)-β-Glc-(1 ---- 6)-Glc的结构,其中每个
戊烯基糖基供体的反应性均由适当的启动子控制。所需的保护基团更改次数。