Intermolecular Photocatalytic C–H Functionalization of Electron-Rich Heterocycles with Tertiary Alkyl Halides
作者:Corey Stephenson、Elizabeth Swift、Theresa Williams
DOI:10.1055/s-0035-1561320
日期:——
The coupling of tertiary alkyl halides with electron-rich arenes is promoted by visible-light photoredox catalysis. Tris[2-phenylpyridinato-C 2,N]iridium(III) [Ir(ppy)3] was the optimal catalyst, enabling direct reduction of the halide from the excited state, and thereby eliminating the requirement for a stoichiometric electron donor. High yields were obtained when the aromatic component was used in
可见光光氧化还原催化促进叔烷基卤化物与富电子芳烃的偶联。三[2-苯基吡啶基-C 2,N] 铱(III) [Ir(ppy)3] 是最佳催化剂,能够直接还原激发态的卤化物,从而消除对化学计量电子供体的要求。当芳族组分使用过量时获得高产率,尽管等摩尔量仅提供略微降低的产率。该反应耐受许多官能团,包括烯丙基、酯、酰胺或氨基甲酸酯。该反应的效率已通过流动放大的证明得到提高,并且分离和表征了一种新的取代的 Ir(ppy)3 衍生物。