Controlled potential electrolysis at a mercury cathode of α- and β-ionone gives, in aqueous dimethylformamide, the corresponding pinacols in ca. 50% chemical yield. By electrolysis in acetonitrile with acetic acid as proton donor β-ionone is converted smoothly into the pinacol (70% isolated yield), and retinal is pinacolised in ca. 10% yield.
R. E. Sioda, B. Terem, J. H. P. Utley and B. C. L. Weedon, J. Chem. Soc., Perkin Trans. 1, 1976, 561 DOI: 10.1039/P19760000561
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