Hydrogen bond-assisted 1,2-cis O-glycosylation under mild hydrogenolytic conditions
作者:Gefei Li、Yanlong Luo、Juan Mo、Masato Noguchi、Jie Jing、Zhenyang Luo、Shin-ichiro Shoda、Xin-Shan Ye
DOI:10.1016/j.cclet.2022.107754
日期:2023.4
A hydrogen bond-assisted α-selective glycosylation reaction by using 4,6-dibenzyloxy-1,3,5-triazin-2-yl (DBT) β-glycosyl donors was developed for the efficient construction of 1,2-cis-α-glycosidic bond in natural products. This method was applied successfully to the direct synthesis of complex oligosaccharide-derived glycolipids with simple protecting chemistry. Mechanistic studies using the NMR spectroscopy
利用 4,6-二苄氧基-1,3,5-三嗪-2-基 (DBT) β-糖基供体进行氢键辅助α-选择性糖基化反应,有效构建 1,2-顺式- α -天然产物中的糖苷键。该方法成功应用于具有简单保护化学的复杂寡糖衍生糖脂的直接合成。使用核磁共振光谱和 DFT 计算的机理研究为氢键辅助糖基化反应向α-特异性构建O-糖苷键提供了概念证明。