Chemistry Letters p. 247 - 247 (1996)
Update date:2022-08-16
Topics:
Ai, Mamoru
Ohdan, Kyoji
Citraconic anhydride (Methyl maleic anhydride) was found to be produced from pyruvic acid by an oxidative decarboxy-condensation. The presence of oxygen is required to promote the reaction. The best catalyst is iron phosphate with a P/Fe atomic ratio of 1.2 and the optimum temperature is about 200 °C. The one-pass yield reaches 71 mol% at a pyruvic acid conversion of 98%. The main side-reaction is the formation of acetic acid and CO2 by oxidative C-C bond fission.
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