Synthesis of a pseudotetrasaccharide corresponding to a repeating unit of the <i>Streptococcus pneumoniae</i> type 6B capsular polysaccharide<sup>*</sup>
作者:Elena V. Sukhova、Dmitry V. Yashunsky、Ekaterina A. Kurbatova、Yury E. Tsvetkov、Nikolay E. Nifantiev
DOI:10.1080/07328303.2017.1420797
日期:2018.1.2
ABSTRACT ABSTRACT 2-Aminoethyl glycoside of the pseudotetrasaccharide α-d-Glcp-(1→3)-α-l-Rhap-(1→4)-d-Rib-ol-(5-P-2)-α-d-Galp structurally related to a repeating unit of the Streptococcus pneumoniae type 6B capsular polysaccharide has been synthesized. At the key step, suitably protected pseudotrisaccharide α-d-Glcp-(1→3)-α-l-Rhap-(1→4)-d-Rib-ol with a free 5-OH group in the ribitol moiety and 2-OH α-galactoside
图解抽象假四糖α-d-Glcp-(1→3)-α-1-Rhap-(1→4)-d-Rib-ol-(5-P-2)-α-的2-氨基乙基糖苷已经合成了与肺炎链球菌6B型荚膜多糖的重复单元结构相关的d-Galp。在关键步骤中,适当保护的假三糖α-d-Glcp-(1→3)-α-1-Rhap-(1→4)-d-Rib-ol在核糖醇部分中具有游离的5-OH基,并且2使用膦酸氢盐步骤,通过磷酸桥连接-OHα-半乳糖苷。