Synthesis of BCD tricyclic analogues of the novel cardiac glycoside rhodexin A
摘要:
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.
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).
Preparation of a Functionalized Tetracyclic Intermediate for the Synthesis of Rhodexin A
作者:Michael E. Jung、Hiufung V. Chu
DOI:10.1021/ol801426z
日期:2008.8.21
An efficient synthesis of the tetracyclic steroid core, 19, of rhodexin A and sarmentogenin is reported. An initial inverse-electron-demand Diels-Alder reaction of the acyldiene 6 with the silyl enol ether 7a gave the cycloadduct 8 with the required four contiguous stereocenters in a single step. This compound was then transformed into the methylated enedione 13 which afforded after a reductive alkylation
Studies Toward the Enantiospecific Total Synthesis of Rhodexin A
作者:Michael E. Jung、Mikhail Guzaev
DOI:10.1021/jo400909t
日期:2013.8.2
enantiospecific total synthesis of rhodexin A via a very hindered inverseelectrondemandDiels–Alderreaction are described. The C8-diastereomer of the fully elaborated tetracyclic core of rhodexin A, 23, was prepared in good yield and excellent selectivity using as the key step the stepwise Diels–Alderreaction of the very hindered dienone 3 and the silyl enolether 4 catalyzed by the very strong Lewis
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.