Synthesis of the <i>Staphylococcus aureus</i> Strain M Capsular Polysaccharide Repeating Unit
作者:Bas Hagen、J. Hessel M. van Dijk、Qingju Zhang、Herman S. Overkleeft、Gijsbert A. van der Marel、Jeroen D. C. Codée
DOI:10.1021/acs.orglett.7b00747
日期:2017.5.19
The synthesis of the Staphylococcus aureus strain M capsular polysaccharide repeating unit is reported. A postglycosylation oxidation strategy was utilized for the construction of the α-galactosaminuronic acid linkages, relying on a stereoselective 2-azido-4,6-O-di-tert-butylsilylidene galactopyranoside donor, for which the selectivity was assessed by model glycosylations. The α-fucosamine linkage
报道了金黄色葡萄球菌菌株M荚膜多糖重复单元的合成。甲postglycosylation氧化策略用于α-galactosaminuronic酸键的结构,依靠立体选择性2-叠氮基-4,6- ø -二-叔-butylsilylidene吡喃半乳糖苷供体,的量,选择性通过模型糖基化进行评估。使用反应性2-叠氮基岩藻糖基供体选择性地安装α-岩藻糖胺键。TEMPO / PhI(OAc)2 -Pinnick氧化规避了在TEMPO / PhI(OAc)2介导的二糖中间体氧化过程中发生的意外糖苷键断裂。