A multicomponent synthesis of substituted 3-styryl-1H-quinoxalin-2-ones is described. Sequential reactions of o-phenylenediamine with sodium pyruvate and aldehydes in 20% aqueous acetic acid containing sodium acetate provided the target products in good to high yields. The reaction is proposed to proceed via initial condensation of the diamine and pyruvate partners followed by an aldol condensation-type mechanism.

中文翻译：

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水性介质中取代3-styryl-1 H -quinoxalin-2-one的多组分合成

描述了取代的3-苯乙烯基-1 H-喹喔啉-2-酮的多组分合成。邻苯二胺与丙酮酸钠和醛在含乙酸钠的20％乙酸水溶液中的顺序反应可提供高至高收率的目标产物。建议该反应通过二胺和丙酮酸酯配偶体的初始缩合，然后是醛醇缩合型机理来进行。