Abstract
Mesoxalic acid (ketomalonic acid) was prepared by oxidative dehydrogenation with air of tartronic acid in aqueous solution on carbon-supported platinum-bismuth catalysts. By increasing the pH, using a higher catalyst/substrate ratio or increasing the temperature, higher yields could be obtained (maximum yield obtained of 65% at 80% conversion). The results obtained for this reaction and for the analogous catalytic oxidations of glyceric acid to hydroxypyruvic acid, and lactic acid to pyruvic acid, enabled a general reaction mechanism to be proposed for the selective oxidation of α-hydroxy acids to α-keto acids on platinum-bismuth catalysts.
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Fordham, P., Besson, M. & Gallezot, P. Catalytic oxidation with air of tartronic acid to mesoxalic acid on bismuth-promoted platinum. Catalysis Letters 46, 195–199 (1997). https://doi.org/10.1023/A:1019082905366
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DOI: https://doi.org/10.1023/A:1019082905366