Visible Light-Induced EDA-Mediated C-3 Coupling of Quinoxalin-2(1H)-ones with Unactivated Aryl Iodides

Visible light-induced C-3 arylation of quinoxalin-2(1H)-ones with abundantly available aryl iodides with good yields via an EDA-complex formation has been accomplished. Both aryl/heteroaryl iodides and quinoxalin-2(1H)-ones possessing electron-donating as well as electron-withdrawing groups were coupled well to access the desired products in good yields. The radical scavenging, EPR, UV-visible experiments, and quantum yield revealed that the reaction went through a radical pathway via a SET process. Furthermore, the protocol could also be applied for late-stage functionalization, illustrated the practicability of the present protocol.