Asymmetric Total Synthesis of (−)-Spirochensilide A, Part 1: Diastereoselective Synthesis of the ABCD Ring and Stereoselective Total Synthesis of 13(<i>R</i>)-Demethyl Spirochensilide A
作者:Xin-Ting Liang、Bao-Chuan Sun、Chang Liu、Yuan-He Li、Nan Zhang、Qian-Qian Xu、Zhong-Chao Zhang、Yi-Xin Han、Jia-Hua Chen、Zhen Yang
DOI:10.1021/acs.joc.0c02494
日期:2021.2.5
construction of the ABCD ring system of spirochensilide A is described. The key steps of this synthesis are a semipinacol rearrangement reaction to stereoselectively construct the AB ring system bearing two vicinal quaternary chiral centers and a Co-mediated Pauson–Khand reaction to form the spiro-based bicyclic CD ring system. This chemistry leads to the stereoselective synthesis of 13(R)-demethyl spirochensilide
描述了螺环硅化物A的ABCD环系统的简洁且非对映选择性的结构。该合成的关键步骤是半频哪醇重排反应,以立体选择性地构建带有两个相邻季铵盐手性中心的AB环系统,以及Co介导的Pauson-Khand反应以形成基于螺环的双环CD环系统。这种化学反应导致了13(R)-去甲基螺金属硅化物A的立体选择性合成,为(-)-螺金属硅化物A的第一个不对称全合成铺平了道路。