A metal-catalyst-free synthesis of substituted quinoxalin-2-ones from 2,2-dibromo-1-arylethanone by employing an oxidative amidation–heterocycloannulation protocol is reported. The substrate scope of the reaction has been demonstrated and a possible mechanism for this reaction has also been proposed.

中文翻译：

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氧化酰胺化-杂环环化法合成喹喔啉-2（1H）-one和六氢喹喔啉-2（1H）-one

据报道，采用氧化酰胺化-杂环环化方法可从2,2-二溴-1-芳酮中无金属催化剂合成取代的喹喔啉-2-酮。已经证明了反应的底物范围，并且还提出了该反应的可能机理。