Metal-free oxidative coupling of quinoxalin-2(1 H)-ones with arylaldehydes leading to 3-acylated quinoxalin-2(1 H)-ones

Abstract

An efficient protocol for the synthesis of 3-aroylquinoxalin-2(1 H)-ones has been developed via a metal-free oxidative cross-coupling reaction of quinoxalin-2(1 H)-ones with aryl aldehydes under mild conditions with good yields.

Abstract

A facile TBHP-mediated direct oxidative coupling of quinoxalin-2(1 H)-ones with arylaldehydes has been developed under metal-free conditions. This method provided a convenient and efficient approach to various 3-acylated quinoxalin-2(1 H)-ones from readily available starting materials with excellent regioselectivity. This reaction proceeded efficiently under mild conditions over a broad range of substrates and with functional group tolerance.