Direct β-Mannosylation of Primary Alcohol Acceptors: Trisaccharide Iteration Assembly of β-1,6-Oligomannosides Corresponding to Kakelokelose
作者:Peng Wang、Junlin Wang、Wenjun Yin、Xianyang Wang、Ni Song、Sumei Ren、Ming Li
DOI:10.1021/acs.orglett.1c04363
日期:2022.1.28
Gold(I)-catalyzed stereoselective β-glycosylation of primary alcohols is achieved using the orthogonally protected mannosyl α-ortho-hexynylbenzoate (OABz) donors devoid of 4,6-O-tethering groups used in conventionally constructing β-mannosidic bonds. The potential of this methodology is showcased by the first assembly of β-1,6-tri/hexa-/nonamannosides and related sulfated congeners through a convergent
金 (I) 催化的伯醇立体选择性 β-糖基化是使用正交保护的甘露糖基 α-邻-己炔基苯甲酸酯 (OABz) 供体实现的,该供体不含用于常规构建 β-甘露糖苷键的 4,6- O-束缚基团。通过收敛策略首次组装 β-1,6-tri/hexa-/nonamannosides 和相关的硫酸化同系物展示了这种方法的潜力。该合成的特点是 α-三甘露糖基 OABz 供体的立体控制 β-糖基化和后期磺化。这项工作有望加快β-1,6-甘露聚糖和功能化衍生物的制备。