Axial-to-Central Chirality Transfer for Construction of Quaternary Stereocenters via Dearomatization of BINOLs
作者:Xiao-Long Min、Xu-Ran Xu、Ying He
DOI:10.1021/acs.orglett.9b03558
日期:2019.11.15
All-carbon quaternary stereocenters are versatile building blocks, and their asymmetric construction has attracted much attention. Herein, we disclose an axial-to-central chirality transfer strategy for the synthesis of chiral quaternary stereocenters via dearomatization of (S)-BINOLs. The reaction proceeded smoothly with a wide range of propargyl carbonates to afford chiral spiro-compounds in high
全碳四元立体中心是通用的构建基块,其不对称结构引起了人们的广泛关注。在这里,我们公开了一种通过(S)-BINOLs脱芳烃合成手性四元立体中心的轴向向中心手性转移策略。该反应用多种碳酸炔丙酯平稳地进行,以高收率提供具有优异对映选择性的手性螺化合物。此外,该策略扩展到了具有中等s值的rac -BINOL的动力学拆分。