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Herein, we describe a rapid microwave‐assisted, metal‐free synthesis of substituted quinoxalinones and quinoxalines using the carbene‐mediated reaction between aryldiazo esters and 1,2‐diamines. The reaction can encompass a range of substituents and structural variations to afford quinoxalin‐2‐ones in 14–80 % yield and corresponding quinoxalines in good to excellent yields upon oxidation (67–96 %)...
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