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Visible-Light-Driven Aerobic Photooxidation of Aldehydes to Methyl Esters Catalyzed by Riboflavin Tetraacetate

Mühldorf, Bernd ; Wolf, Robert


Riboflavin tetraacetate (RFT) catalyzes the aerobic esterification of para-substituted benzaldehydes to their corresponding methyl esters. The reaction proceeds under visible-light irradiation in MeOH/MeCN in the presence of a Bronsted acid such as HCl. Electron transfer from the in situ formed dimethyl acetal to the photoexcited triplet flavin appears to be a key mechanistic step. The acid ...


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