Photoinduced Nickel-Catalyzed Chemo- and Regioselective Hydroalkylation of Internal Alkynes with Ether and Amide α-Hetero C(sp<sup>3</sup>)–H Bonds
作者:Hong-Ping Deng、Xuan-Zi Fan、Zhi-Hui Chen、Qing-Hua Xu、Jie Wu
DOI:10.1021/jacs.7b08158
日期:2017.9.27
with unfunctionalized ethers and amides was achieved in an atom-efficient and additive-free manner through the synergistic combination of photoredox and nickel catalysis. The protocol was effective with a wide range of internal alkynes, providing products in a highly selective fashion. Notably, the observed regioselectivity is complementary to conventional radical addition processes. Mechanistic investigations
通过光氧化还原和镍催化的协同结合,以原子有效且无添加剂的方式实现了二取代炔烃与未官能化醚和酰胺的直接加氢烷基化。该协议对多种内部炔烃均有效,以高度选择性的方式提供产品。值得注意的是,观察到的区域选择性与常规的自由基加成方法互补。机理研究表明,光激发的铱催化剂通过单电子转移促进了镍的活化。