In the report, we described the ruthenium(II)-catalyzed C–H activation/cyclization of 2-arylquinazolinones with vinyl carbonate for the synthesis of different fused quinazolinones. Through this strategy, the 6-hydroxy-5,6-dihydro-8H-isoquinolino[1,2-b]quinazolin-8-one and 8H-isoquino[1,2-b] quinazolin-8-one have been obtained, respectively, under different temperatures. Additionally, the reaction features broad substrate scope and good yields, only producing carbon dioxide as byproduct. Moreover, we performed preliminary mechanistic studies of this reaction and proposed a possible mechanism.

中文翻译：

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Ru(II)-催化的2-苯基喹唑啉酮和碳酸亚乙烯酯之间的C-H活化反应

在报告中，我们描述了钌（II）催化的 2-芳基喹唑啉酮与碳酸乙烯酯的 C-H 活化/环化，用于合成不同的稠合喹唑啉酮。通过该策略，获得了6-羟基-5,6-二氢-8H-异喹啉并[1,2-b]喹唑啉-8-酮和8H-异喹诺[1,2-b]喹唑啉-8-酮，分别在不同温度下。此外，该反应具有广泛的底物范围和良好的收率，仅产生二氧化碳作为副产物。此外，我们对该反应进行了初步的机理研究，并提出了可能的机理。