Unified Protocol for Cobalt-Catalyzed Oxidative Assembly of Two Aryl Metal Reagents Using Oxygen as an Oxidant
作者:Lian-Yan Liao、Kun-Ming Liu、Xin-Fang Duan
DOI:10.1021/acs.joc.5b01787
日期:2015.10.16
reaction of two aryl metal reagents is described. An equivalent amount of two aryl Grignard or lithium reagents, after mediation by an equivalent amount of simple ClTi(OEt)3, was facilely assembled under the catalysis of 1 mol % of CoCl2/10 mol % of DMPU using oxygen. The cross-couplings between various aryl metal reagents, especially between two structurally similar aryl Grignard reagents, proceeded smoothly
描述了两种芳基金属试剂的首次钴催化的氧化交叉偶联反应。通过简单的将ClTi(OET)等量的两个芳基或格利雅试剂锂等量,调停后3,1摩尔%的氯化钴的催化下轻便组装2使用氧气/ 10%(摩尔)的DMPU。各种芳基金属试剂之间,特别是两种结构相似的芳基格氏试剂之间的交叉偶联,可以平稳,选择性地进行,因此提供了一种构建联芳基化合物的高度通用且有效的方法。