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Energy transfer facilitates divergent synthesis of pyridine-2-ones, suggesting efficient reaction conditions and a catalytic cycle.
An energy transfer (EnT) catalyzed photocyclization process for the divergent synthesis of substituted 3,4-dihydropyridin-2(1H)-ones and pyridine-2-ones in sustainable solvents is realized by tuning the reaction conditions. The present metal-free system exhibits a high reaction efficiency and good functional group tolerance. Notably, the TEMPO-trap experiment, control experiments, and DFT calculations have offered evidence supporting the proposed catalytic cycle.
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REN et al. (2025) studied this question.
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