Cobalt-Catalyzed Aerobic Oxidative C–H/C–H Cross-Coupling of Unactivated Arenes for the Synthesis of Biaryls
作者:Ningning Lv、Zhengkai Chen、Yue Liu、Zhanxiang Liu、Yuhong Zhang
DOI:10.1021/acs.orglett.8b02526
日期:2018.9.21
A mild and efficient protocol for the synthesis of 2,2′-difunctional biaryls from readily available benzamides and oximes by Co(OAc)2·4H2O catalysis has been developed. The catalytic cycle that includes aerobic oxidation of Co(I) to Co(III) is successfully achieved for the first time through dual-chelation-assisted C–H/C–H coupling with the assistance of catalytic Mn(acac)3. The catalytic system exhibits
已经开发了一种温和有效的方案,可通过Co(OAc)2 ·4H 2 O催化从易于获得的苯甲酰胺和肟合成2,2'-双官能联芳基。首次通过双重螯合辅助的C–H / C–H结合催化Mn(acac)3成功地实现了包括Co(I)有氧氧化为Co(III)的催化循环。催化体系具有强大的反应活性,并能耐受大量敏感的官能团。