Two methods are reported for the 1,2- and 1,1-arylboration of α-methyl vinyl arenes. In the case of 1,2-arylboration, the formation of a quaternary center occurred through a rare cross-coupling reaction of a tertiary organometallic complex. 1,1-Arylboration was enabled by catalyst optimization and occurred through a β-hydride elimination/reinsertion cascade. Enantioselective variants of both processes
报道了两种方法用于α-甲基
乙烯基芳烃的1,2-和1,1-芳基
硼化。在1,2-芳基
硼酸酯化的情况下,通过罕见的叔有机
金属配合物的交叉偶联反应形成了季中心。通过催化剂优化可以实现1,1-芳基
硼化,并通过β-
氢化物消除/重新插入级联反应进行。提出了两种方法的对映体选择性变体以及机理研究。