作者:Ian S. Young、Michael A. Kerr
DOI:10.1021/ja068047t
日期:2007.2.1
The total synthesis of (+)-nakadomarin A is described. A three-component cycloaddition of a hydroxylamine, aldehyde, and cyclopropane to form a highly functionalized tetrahydro-1,2-oxazine serves as the foundation for this synthesis. The resulting oxazine is formed as a single diastereomer with the absolute configuration being dictated by the chirality of the cyclopropane. Other key steps include:
描述了 (+)-nakadomarin A 的全合成。羟胺、醛和环丙烷的三组分环加成反应形成高度官能化的四氢-1,2-恶嗪是该合成的基础。所得恶嗪形成为单一非对映异构体,其绝对构型由环丙烷的手性决定。其他关键步骤包括:通过还原使丙二酸去对称化、Heck 环化和吡咯烷形成,以及闭环复分解以形成两种环烯烃。总的来说,合成需要从环丙烷进行 23 个线性步骤,而环丙烷又可以从市售的 d-甘露醇中以光学纯形式获得(六个步骤)。