Glycosylation reactions are significant as they provide access to model compounds that are useful for elucidating biochemical pathways. Herein, we describe the development of glycosyl ortho-alkynylbenzoates as novel, bench-top stable, and readily available glycosyl donors. Glycosylation is promoted by inexpensive trimethylsilyl triflate (TMSOTf) in combination with N-iodosuccinimide (NIS) under mild
Facile synthesis of a pentasaccharide mimic of a fragment of the capsular polysaccharide of Streptococcus pneumoniae type 15C
作者:Yong-Xiang Chen、Wei Zhao、Lei Zhao、Yu-Fen Zhao、Yan-Mei Li
DOI:10.1016/j.carres.2007.12.002
日期:2008.3
A pentasaccharide mimic of a fragment of the capsularpolysaccharide of Streptococcuspneumoniaetype 15C beta-D-Galp-(1-->4)-beta-D-Glcp-(1-->6)-[alpha-D-Galp-(1-->2)-beta-D-Galp-(1-->4) ]-beta-D-GlcpNAc-(1-->OCH2CH2N3) (1) was synthesized in a regio- and stereoselective manner. The 2-azidoethyl-spacered pentasaccharide mimic 1 can be used to construct a neoglycoconjugate antigen.