Highly Enantioselective Construction of Fully Substituted Stereocenters Enabled by <i>In Situ</i> Phosphonium-Containing Organocatalysis
作者:Hongkui Zhang、Chunhui Jiang、Jian-Ping Tan、Hui-Lin Hu、Yayun Chen、Xiaoyu Ren、Hong-Su Zhang、Tianli Wang
DOI:10.1021/acscatal.0c01079
日期:2020.5.15
yields with excellent enantioselectivities (99.0 to >99.9% ee) under very low catalyst loading (0.5 mol %). The success of gram-level preparation and synthetic transformations proves the potential of this catalytic strategy for practical applications. Mechanistic investigation, including control experiments, in situ NMR analysis, and ESI-HRMS characterization of intermediates, provides insights into the
在本文中,我们介绍了重要且实用的双功能原位含containing有机催化及其在环状酮亚胺和β-酮酸之间的不对称脱羧转化在含氮完全取代的立体中心的高效和对映选择性构建中的初步应用。通过这种催化方案,可以在非常低的催化剂负载量(0.5摩尔%)下,以优异的对映选择性(99.0至> 99.9%ee)以高收率轻松合成各种旋光性环状叔胺衍生物。克级制备和合成转化的成功证明了这种催化策略在实际应用中的潜力。机械调查,包括原位控制实验 NMR分析和中间体的ESI-HRMS表征提供了对该机理的见解。