Cp*Co(III)-Catalyzed C(sp<sup>3</sup>)–H Bond Activation: A Highly Stereoselective and Regioselective Alkenylation of 8-Methylquinoline with Alkynes
作者:Malay Sen、Balakumar Emayavaramban、Nagaraju Barsu、J. Richard Premkumar、Basker Sundararaju
DOI:10.1021/acscatal.6b00612
日期:2016.5.6
Efficient, atom-economical, highly regioselective C(sp3)–H bond alkenylation of 8-methylquinoline catalyzed by (Cp*)Co(III) is reported. A well-defined, air-stable, molecular cobalt catalyst, Cp*Co(III), is employed for the first time in C(sp3)–H bond activation. The developed methodology is broadly applicable and tolerates a variety of functional groups, under mild conditions. Experimental and density
报道了由(Cp *)Co(III)催化的高效的,原子经济的,高度区域选择性的C(sp 3)–H键的8-甲基喹啉C链烯基化反应。定义明确的,空气稳定的分子钴催化剂Cp * Co(III)首次用于C(sp 3)–H键活化。所开发的方法具有广泛的适用性,并且在温和的条件下可以耐受各种官能团。实验和密度泛函理论(DFT)结果表明,最初的环金属化是通过外部碱基辅助的协同金属化去质子化途径发生的。