Asymmetric Total Synthesis of Lancifodilactone G Acetate. 1. Diastereoselective Synthesis of CDEFGH Ring System
作者:Tian-Wen Sun、Dong-Dong Liu、Kuang-Yu Wang、Bing-Qi Tong、Jia-Xin Xie、Yan-Long Jiang、Yong Li、Bo Zhang、Yi-Fan Liu、Yuan-Xian Wang、Jia-Jun Zhang、Jia-Hua Chen、Zhen Yang
DOI:10.1021/acs.joc.7b02915
日期:2018.7.6
The stereoselective construction of the CDEFGH ring system of lancifodilactone G is described. The key steps in this synthesis are (i) ring-closing metathesis for formation of the oxa-bridged eight-membered ring; (ii) an intramolecular Pauson–Khand reaction for construction of the sterically congested F ring; and (iii) sequential cross-metathesis, hydrogenation, and lactonization reactions for installation
描述了lancifodilactone G的CDEFGH环系统的立体选择性结构。该合成的关键步骤是:(i)形成氧杂桥联的八元环的闭环易位;(ii)分子内的Pauson-Khand反应,用于构建空间拥挤的F环;(iii)顺序的交叉复分解,氢化和内酯化反应,以安装Lancifodilactone G的异源稳定的双螺缩酮片段。