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Abstract Disclosed here is an efficient approach for the preparation of quinoxaline‐2,3‐diones using air (O 2 ) as a green oxidant via acid‐promoted self‐photocatalyzed regioselective oxidation of quinoxalin‐2(1 H )‐ones at C‐3 position. This protocol presents a novel synthetic route for the preparation of quinoxaline‐2,3‐dione derivatives, featuring mild reaction conditions, simple operation, and a wide range of substrates, without the need for external photocatalysts, metal reagents, and strong oxidants.
Song et al. (Thu,) studied this question.
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