Stereoselective Synthesis of α-Linked 2-Deoxy Glycosides Enabled by Visible-Light-Mediated Reductive Deiodination
作者:Hao Wang、Jinyi Tao、Xinpei Cai、Wei Chen、Yueqi Zhao、Yang Xu、Wang Yao、Jing Zeng、Qian Wan
DOI:10.1002/chem.201405516
日期:2014.12.22
2‐Deoxy sugars and their derivatives occur abundantly in many pharmaceutically important natural products. However, the construction of specific 2‐deoxy‐glycosidic bonds remains as a challenge. Herein, we report an efficient way to prepare 2‐deoxy‐α‐glycosides by glycosylation of 2‐iodo‐glycosyl acetate and subsequent visible‐light‐mediated tin‐free reductive deiodination. We have successfully applied
Cis-fused chiral bicyclic acetals are readily prepared from glycals in a two-step procedure via the tri-n-butylstanne-mediated cyclization of simple ω-unsaturated glycosides of 2-bromo- 2-deoxy-glycopyranosides.