Enantioselective reduction of azaarene-based ketones <i>via</i> visible light-driven photoredox asymmetric catalysis
作者:Baokun Qiao、Chunyang Li、Xiaowei Zhao、Yanli Yin、Zhiyong Jiang
DOI:10.1039/c9cc03661j
日期:——
An enantioselective reduction of azaarene-based ketones through photoredox asymmetric catalysis is reported. With a transition metal-free dual catalytic system including a chiral phosphoric acid and a photosensitizer DPZ mediated by visible light, the transformations involved a tandem process involving double single-electron-transfer reductions and enantioselective protonation, providing valuable chiral
据报道,通过光氧化还原不对称催化,对氮杂芳烃基酮的对映选择性还原。借助包含手性磷酸和光敏剂DPZ的无过渡金属双催化体系,该体系由可见光介导,转化过程涉及串联过程,该过程涉及双单电子转移还原和对映选择性质子化,从而以高收率提供了有价值的手性醇(向上至> 99%)具有良好至优异的对映选择性(高达97%ee)。