Metal-Free Visible-Light-Induced C-H/C-H Cross-Dehydrogenative-Coupling Of Quinoxalin-2(H)-Ones With Simple Ethers

A convenient and practical metal-free visible light-promoted method to synthesize 3-oxyalkylated quinoxalin-2(1H)-ones was developed at room temperature. The present transformation could be accomplished through Rose Bengal catalyzed C-H/C-H cross-dehydrogenative-coupling of quinoxalin-2(H)-ones with simple ethers, providing an efficient and operationally simple method to access various 3-oxyalkylated quinoxalin-2(1H)-ones with moderate to good yields.