New Solutions to the C-12,13 Stereoproblem of Epothilones B and D; Synthesis of a 12,13-Diol-Acetonide Epothilone B Analog
作者:Tanja Gaich、Gunter Karig、Harry J. Martin、Johann Mulzer
DOI:10.1002/ejoc.200600113
日期:2006.8
New approaches are described to the synthesis of epothilone B and a 12,13-diol-acetonide derivative. Specifically the (12Z) double bond is formed quantitatively by a silicon-tethered ring-closing metathesis (RCM) reaction with 85 % selectivity. Alternatively, a direct route to the 12,13-epoxide by cyclization of a 12,13-diol has been developed. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany
描述了合成埃坡霉素 B 和 12,13-二醇-丙酮衍生物的新方法。具体而言,(12Z)双键通过具有85%选择性的硅系闭环复分解(RCM)反应定量形成。或者,已经开发了通过 12,13-二醇环化生成 12,13-环氧化物的直接途径。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)