l linkages was established using nonparticipating and strong electron-withdrawing C-2-2,4-dinitrobenzenesulfonamide (DNsNH)-directed SN2-like glycosylation of glycosyl ortho-hexynylbenzoates. The reaction is applicable to a wide range of O-, N-, and C-nucleophiles and features convenient conversion of DNsNH into AcNH in high yield under mild conditions. Oligomerization-ready trisaccharide, composed
使用不参与和强吸电子的C-2-2,4-
二硝基苯磺酰胺(DNsNH)定向的糖基邻
己基苯甲酸酯的S N 2样糖基化,建立了构建β- d-
葡萄糖-/半
乳糖氨基基连接的有效方案。该反应适用于各种O-,N-和C-亲核试剂,并且具有在温和条件下将DNsNH方便地高产率转化为AcNH的特征。由β- d-(1→3)-
葡糖氨基残基组成的易于寡聚的三糖已获得,为合成与脑膜炎奈瑟氏球菌荚膜
多糖相关的
寡糖奠定了坚实的基础。