A convenient and one-pot approach to prepare [1,2,3]triazolo[1,5-a]quinoxalin-4(5H)-ones by a metal-free sequential Ugi-4CR/alkyne–azide cycloaddition reaction has been developed. The reaction of 2-azidobenzenamines, aldehydes, propiolic acids, and isocyanides produced the Ugi adducts, which were transformed to the [1,2,3]triazolo[1,5-a]quinoxalin-4(5H)-ones in moderate to good yields via alkyne–azide cycloaddition reaction.

中文翻译：

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[1,2,3]Triazolo[1,5-a]quinoxalin-4(5H)-ones 通过无金属顺序 Ugi-4CR/炔-叠氮环加成反应一锅法合成

已开发出一种通过无金属顺序 Ugi-4CR/炔-叠氮化物环加成反应制备 [1,2,3] 三唑并 [1,5-a] 喹喔啉-4(5H)-酮的方便且一锅法. 2-叠氮苯胺、醛、丙炔酸和异氰化物的反应产生了 Ugi 加合物，然后在中等至中度转化为 [1,2,3] 三唑并 [1,5-a] 喹喔啉-4(5H)-酮。通过炔烃-叠氮化物环加成反应获得良好的收率。