作者:Michael H. Becker、Peter Chua、Robert Downham、Christopher J. Douglas、Neil K. Garg、Sheldon Hiebert、Stefan Jaroch、Richard T. Matsuoka、Joy A. Middleton、Fay W. Ng、Larry E. Overman
DOI:10.1021/ja074300t
日期:2007.10.1
studies toward the complex marine alkaloid sarain A. Various strategies were conceived, setbacks encountered, and solutions developed, ultimately leading to a successful enantioselective total synthesis. Our route to (+)-sarain A features a number of key steps, including an asymmetric Michael addition to install the C4'-C3'-C7' stereotriad, an enoxysilane-N-sulfonyliminium ion cyclization to set the C3 quaternary
本文描述了我们对复杂海洋生物碱 sarain A 的合成研究的细节。设想了各种策略、遇到的挫折和开发的解决方案,最终导致对映选择性全合成的成功。我们的 (+)-sarain A 路线具有许多关键步骤,包括不对称迈克尔加成以安装 C4'-C3'-C7' 立体三联体,烯氧基硅烷-N-磺酰亚胺离子环化以设置 C3 季碳立体中心,并组装二氮杂三环十一烷核心、构建13元环的闭环复分解、形成不饱和14元大环的分子内Stille偶联以及叔胺-醛邻近相互作用的后期安装。