Sulphides react rapidly with acyl nitrates, even at –76 °C, to give sulphoxides in high yield with no sulphone formation; either acetyl nitrate, formed from acetic anhydride and concentrated nitric acid, or, for milder conditions, benzoyl nitrate, formed from benzoyl chloride and silver nitrate, give satisfactory results.
R. Louw, H. P. W. Vermeeren, J. J. A. van Asten and W. J. Ultée, J. Chem. Soc., Chem. Commun., 1976, 496 DOI: 10.1039/C39760000496
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