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H2O2-Promoted Alkylation of Quinoxalin-2(1H)-ones with Styrenes and Dimethyl Sulfoxide

A hydrogen peroxide (H2O2)-mediated quinoxaline-2(1H)-ones hydrocarbylation reaction has been reported. The reaction is achieved through the difunctionalization of styrene. In this transformation, methyl radical resulting from dimethyl sulfoxide firstly attacks styrenes to provide alkyl radicals which then undergo alkylation at the C3 position of quinoxalin-2(1H)-one. A green, convenient, and simple protocol for the synthesis of 3-alkylquinoxalin-2(1H)-ones was provided.