A tandem cleavage of carbon-carbon and carbon-nitrogen bonds in imidazo[1,2-a]pyridines and imidazo[1,2-a]quinolines is reported in the presence of eosin Y and visible light. The ring opening occurs under ambient conditions through singlet oxygen insertion, bond cleavage and CO2 elimination, and produces N-(pyridin-2-yl) amides and N-(quinolin-2-yl) amides in high yields. The reaction shows good versatility, and does not require strong external oxidants and additives.

中文翻译：

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单线态氧在可见光下介导的CC和CN键双键断裂。

据报道，在曙红Y和可见光存在下，咪唑并[1,2-a]吡啶和咪唑并[1,2-a]喹啉中的碳-碳和碳-氮键串联裂解。开环在环境条件下通过单线态氧插入，键裂解和CO 2消除而发生，并以高收率产生N-（吡啶-2-基）酰胺和N-（喹啉-2-基）酰胺。该反应显示出良好的通用性，并且不需要强外部氧化剂和添加剂。