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A metal- and photocatalyst-free method for reductive homocoupling of α-ketoesters using ascorbic acid as a mild hydrogen source is reported. This approach avoids strong stoichiometric reductants or complex photocatalysts, The method tolerates various functional groups, enables quaternary carbon centers, and is scalable to grams.
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Y. Q. He, Y. Ye, Q. Yao, G. Tu, T. Zhao, H. Qiu, J. Song, W. Tian and C. Zhang, Org. Biomol. Chem., 2026, Accepted Manuscript , DOI: 10.1039/D6OB00535G
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