作者:Yanyan Zhang、Dengxiang Dong、Huanhuan Qu、Matthieu Sollogoub、Yongmin Zhang
DOI:10.1002/ejoc.201101062
日期:2011.12
The total synthesis of 2d-deoxy Lewisx pentasaccharide is described. Ethyl 2-O-acetyl-3,4,6-tri-O-benzyl-1-thio-α,β-D-galactopyranoside was condensed with a diol of glucosamine to regio- and stereoselectively give the disaccharide, the C-2′ position was then reduced after stereoselective fucosylation to afford a Lewisx trisaccharide analogue. Regioselective glycosylation of a known lactoside diol with
描述了 2d-脱氧 Lewisx 五糖的全合成。乙基 2-O-乙酰基-3,4,6-tri-O-benzyl-1-thio-α, β-D-吡喃半乳糖苷与葡萄糖胺二醇缩合以区域和立体选择性地得到二糖,C-2 '然后在立体选择性岩藻糖基化后降低位置以提供Lewisx三糖类似物。已知的乳糖苷二醇与这种三糖的区域选择性糖基化提供了一种五糖,在脱保护后得到目标五糖。