A Cobalt-Catalyzed Enantioconvergent Radical Negishi C(sp<sup>3</sup>)–C(sp<sup>2</sup>) Cross-Coupling with Chiral Multidentate <i>N</i>,<i>N</i>,<i>P</i>-Ligand
作者:Zhuang Li、Xian-Yan Cheng、Ning-Yuan Yang、Ji-Jun Chen、Wen-Yue Tang、Jun-Qian Bian、Yong-Feng Cheng、Zhong-Liang Li、Qiang-Shuai Gu、Xin-Yuan Liu
DOI:10.1021/acs.organomet.1c00190
日期:2021.7.26
cobalt-catalyzed enantioconvergent radical Negishi C(sp3)–C(sp2) cross-coupling of racemic benzyl chlorides with arylzinc reagents has been developed in good yield with moderate enantioselectivities. This strategy provides an expedient access toward a range of enantioenriched 1,1-diarylmethanes. Key to this discovery is the utilization of a chiral multidentate anionic N,N,P-ligand to strongly coordinate with the
钴催化的对映聚合自由基 Negishi C(sp 3 )–C(sp 2 ) 的外消旋苄基氯与芳基锌试剂的交叉偶联已经以良好的收率和中等的对映选择性开发出来。该策略为获得一系列对映体富集的 1,1-二芳基甲烷提供了便利。这一发现的关键是利用手性多齿阴离子N , N , P配体与钴催化剂强配位并调节其手性环境,从而实现对高反应性前手性烷基自由基物种的对映控制。