Efficient synthesis of core 2 class glycosyl amino acids by one-pot glycosylation approach
作者:Hiroshi Tanaka、Masaatsu Adachi、Takashi Takahashi
DOI:10.1016/j.tetlet.2003.12.042
日期:2004.2
We describe the one-pot synthesis of core 2 class branched oligosaccharides initiated by chemo-selective glycosylation of silyl anther. Glycosylation of 6-O-silyl-4-benzyl-2-azido-thiogalactoside with glycosyl fluoride provided selectively 6-glycosylated thioglycoside without both O-glycosylation at the 3 position and S-glycosylation. Subsequent coupling of galactosyl fluoride and amino acids afforded the protected branched oligosaccharides in good yields. (C) 2003 Elsevier Ltd. All rights reserved.