Abstract
Disclosed here is an efficient approach for the preparation of quinoxaline-2,3-diones using air (O2) as a green oxidantviaacid-promoted self-photocatalyzed regioselective oxidation of quinoxalin-2(1H)-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.
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