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Abstract Ethylene is readily produced aerobically from α-keto-γmethylthiobutyric acid as well as from β-methylthiopropionaldehyde (methional) by peroxidase in the presence of Mn2+, SO32-, and phenol. Tracer studies indicate that carbons 1, 2, 3 plus 4, and the methyl carbon of α-keto-γ-methylthiobutyric acid gives rise to carbon dioxide, carbon dioxide, ethylene, and methyldisulfide, respectively. Carbons 1, 2 plus 3, and the methyl carbon of methional give rise to formic acid, ethylene, and methyldisulfide, respectively. A chemical mechanism accounting for the production of these products is described in which the peroxidase functions as 1-electron oxidizing agent.
Shang Fa Yang (Fri,) studied this question.