摘要:
GRAPHICAL ABSTRACT[GRAPHICS]Branched tetrasaccharide derivatives as the repeating units of schizophyllan were synthesized using a common intermediate that had different protecting groups on the hydroxyl groups. Accordingly, beta-1,3-disaccharide acceptors were efficiently glycosylated in a stepwise manner using monosaccharide donors to construct the branched tetrasaccharides. As a result, oligosaccharides with an internal branch rather than a branch on the terminal residue suitable for the synthesis of branched beta-glucan were obtained.