Quinoxaline derivatives have been prepared in good to excellent yields using silica gel as catalyst from various 1,2-diketones and 1,2-diamines under solvent-free conditions for the first time. The advantages of this method are short reaction time, reaction simplicity, convenient workup procedure, and purification of compounds by a nonchromatographic method.
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Nandi et al. (2011) studied this question.
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