Phosphorylation of 2-Aryl Quinoxaline Derivatives via C-H/P-H Cross Coupling under Transition-Metal-Free Conditions

Abstract

In this study, we have developed an efficient protocol for synthesis of phosphorus-substituted heterocycles through reaction between 2-Aryl quinoxalines and dialkyl phosphites under transition-metal-free conditions. Here, K2S2O8 has been used as the sole oxidant for the facile synthesis of phosphorus substituted derivates. A variety of heteroaryl phosphonate derivatives have been synthesized under optimized conditions in good to excellent yields with this facile and environment friendly protocol.