Cobalt-Catalyzed Synthesis of Unsymmetrically <i>N</i>,<i>N</i>-Disubstituted Formamides via Reductive Coupling of Primary Amines and Aldehydes with CO<sub>2</sub> and H<sub>2</sub>
作者:Zhengang Ke、Zhenzhen Yang、Zhenghui Liu、Bo Yu、Yanfei Zhao、Shien Guo、Yunyan Wu、Zhimin Liu
DOI:10.1021/acs.orglett.8b02384
日期:2018.11.2
Herein, a novel route to synthesize unsymmetrically N,N-disubstituted formamides is reported, which is achieved via reductive coupling of primary amine and aldehyde with CO2/H2 over a cobalt-based catalytic system composed of CoF2, P(CH2CH2PPh2)3 and K2CO3. The mechanism investigation indicates that a secondary amine is formed via hydrogenation of the imine originated from aldehyde and primary amine
本文中,报道了一种新颖的合成不对称的N,N-二取代甲酰胺的途径,该途径是通过在由CoF 2,P(CH 2)组成的钴基催化体系上伯胺和醛与CO 2 / H 2的还原偶联而实现的。CH 2 PPh 2)3和K 2 CO 3。机理研究表明,仲醛是通过醛和伯胺中亚胺的加氢反应生成的,它进一步与CO 2氢化生成的HCOOH反应,最终形成NNFA。