Stereocontrolled Synthesis of a Trihydroxylated Indolizidine Alkaloid, 1-Deoxycastanospermine
作者:Hidemi Yoda、Tomohito Nakajima、Kunihiko Takabe
DOI:10.1055/s-1997-962
日期:1997.8
An efficient and novel process is described for the asymmetric synthesis of (6S,7R,8R,8aR)-6,7,8-trihydroxyindolizidine alkaloid, 1-deoxycastanospermine in 22% overall yield based on the C2-imide featuring the completely stereoselective reduction of an α-hydroxypyrrolidine intermediate elaborated through asymmetric deoxygenation of a quaternary α-hydroxylactam.
本文介绍了一种高效、新颖的不对称合成(6S,7R,8R,8aR)-6,7,8-三羟基吲嗪生物碱--1-脱氧卡斯特罗芒碱的工艺,该工艺基于 C2- 亚胺,其特点是通过季δ-羟基内酰胺的不对称脱氧反应,将δ-羟基吡咯烷中间体完全立体选择性还原。