Synthesis of an N-glycan decasaccharide of the hybrid type
作者:Xaver Schratt、Carlo Unverzagt
DOI:10.1016/j.tetlet.2004.11.111
日期:2005.1
A hybrid-type N-glycan decasaccharide GlcNAcMan(7)GlcNAc(2) was synthesized from the pentasaccharide GlcNAcMan(2)GlcNAc(2) as an advanced intermediate and an acyl-protected pentamannosyl donor. Benzyl mannoside was regioselectively benzoylated and glycosylated at OH-3 and OH-6 with a dimannoside to give the 3,6-branched pentamannoside. Coupling of the two pentasaccharides furnished the target decasaccharide in 60% yield. Deprotection of the base labile functions furnished a hybrid-type N-glycan decasaccharide functionalized for the conjugation with peptides or proteins. (C) 2004 Elsevier Ltd. All rights reserved.