An efficient totalsynthesis of rhodexin A (1) is reported. An initial inverse-electron-demand Diels–Alder reaction of the acyldiene 6 with the silyl enol ether 7 gave the cycloadduct 8 with the required 4 contiguous stereocenters in a single step. This compound was then transformed into the tetracyclic enone 16, which was converted to rhodexin A (1).
Synthesis of BCD tricyclic analogues of the novel cardiac glycoside rhodexin A
作者:Michael E. Jung、Hiufung V. Chu
DOI:10.1016/j.tetlet.2011.06.114
日期:2011.8
A concise synthesis of novel cardiac glycoside analogues of rhodexin A, 14 and 24, having the BCD tricyclic system is described. The key constructive step is an inverse-electron demand Diels-Alder reaction of the silyl enol ether 4 and the 2-acetyldiene, 7 and 15. (c) 2011 Elsevier Ltd. All rights reserved.