Synthesis of the TrifucosylatedN-Linked Hexasaccharide of a Glycoprotein fromHaemonchus contortus
作者:Peter Söderman、E. Andreas Larsson、Göran Widmalm
DOI:10.1002/1099-0690(200205)2002:10<1614::aid-ejoc1614>3.0.co;2-1
日期:2002.5
The synthesis of a hexasaccharide from the inner part of an N-linked oligosaccharide portion of a glycoprotein from Haemonchus contortus is described. This hexasaccharide contains a novel fucosylation pattern with three α-linked fucosyl groups at O-3, O-6 and O-3′ of the two N-acetylglucosamine residues. In the synthesis two consecutive regioselective glycosylations were performed, thereby limiting
描述了一种由捻转血矛线虫(Haemonchus contortus)的糖蛋白的N-连接的寡糖部分的内部合成六糖的方法。该六糖含有新颖的岩藻糖基化模式,在两个N-乙酰基葡糖胺残基的O -3,O -6和O -3'处具有三个α-连接的岩藻糖基基团。在合成中,进行了两个连续的区域选择性糖基化,从而限制了保护基的操纵,从而产生了具有β-(1⇄4)键的三糖。随后一步进行岩藻糖基化,然后通过在C的置换反应转化构型末端葡糖基残基的-2''产生了所得的β-甘露糖基键。2-乙酰氨基-2-脱氧-葡糖胺残基被N-乙酰基封端,并且六糖被脱保护。(©Wiley-VCH Verlag GmbH,69451 Weinheim,Germany,2002)