Total Synthesis of Starfish Cyclic Steroid Glycosides. Part 2, Model Synthesis via Intramolecular Etherification
作者:Youxi Chen、Guozhi Xiao、Dapeng Zhu、Biao Yu
DOI:10.1002/cjoc.202200786
日期:2023.4.15
Sepositoside A (1) is a prototypical cyclic steroid glycoside bearing a hybrid 16-membered ring composed of the steroid skeleton and a 1,2-trans-linked trisaccharide. Herein, we report an expedient access toward two simplified analogues, in which the strained 16-membered ring is constructed via Au(I)-catalyzed intramolecular addition of alcohol to epoxide. A similar macroetherification in relevant
Sepositoside A ( 1 ) 是一种原型环状类固醇糖苷,带有由类固醇骨架和 1,2-反式连接的三糖组成的混合 16 元环。在此,我们报告了两种简化类似物的权宜之计,其中应变 16 元环是通过 Au(I) 催化的醇分子内加成环氧化物而构建的。相关类固醇三糖中的类似大醚化已得到深入研究,但未能提供 Sepositoside A 的大环骨架。