Cross-dehydrogenative coupling strategy for phosphonation and cyanation of secondary N-alkyl anilines by employing 2,3-dichloro-5,6-dicyanobenzoquinone
作者:Qing Liu、Shuchen Yu、Liangzhen Hu、Muhamad Ijaz Hussain、Xiaohui Zhang、Yan Xiong
DOI:10.1016/j.tet.2018.10.058
日期:2018.12
has been developed firstly under mild reaction conditions. Based on detailed optimization of reaction conditions, the substrate generality of N-alkyl anilines and various hydrogen phosphonates has been investigated, and a series of versatile α-aminophosphonates and α-aminonitriles were therefore furnished in good to excellent yields. A plausible collective reaction mechanism through dehydrogenation to
首先在温和的反应条件下开发了无金属的膦酸和仲N-烷基苯胺氰化的交叉脱氢偶联策略。在详细优化反应条件的基础上,研究了N-烷基苯胺和各种膦酸氢盐的底物通用性,因此提供了一系列通用的α-氨基膦酸酯和α-氨基腈,收率良好至优异。提出了通过脱氢形成亚胺,然后分别形成α-氨基膦酸酯和α-氨基腈的合理的集体反应机理。