Direct C3 Alkoxylation of Quinoxalin-2(1H)-ones with Alcohols via Cross-Dehydrogenative Coupling under Catalyst-Free Conditions

A facile and effective alkoxylation protocol of quinoxalin-2(1H)-ones with primary or secondary alcohols via cross-dehydrogenative coupling under catalyst-free conditions has been disclosed. This method provides a powerful and convenient access to 3-alkoxylquinoxalin-2(1H)-ones in good to excellent yields by utilizing PhI(OTFA)2as an oxidant and allows to easily obtain potential drug molecules containing 3-alkoxylquinoxalin-2(1H)-one skeletons.