O-Ethyl S-phenacyl dithiocarbonate (I) and its S-acetonyl analogue (III) are converted respectively into O-ethyl-(benzoyl)thioacetate (II) and acetothioacetate (IV) by sulphide contraction. Keto–enol equilibria and alkylation of the anions of these β-oxo-thionesters have been investigated briefly.
A. J. Bridges and G. H. Whitham, J. Chem. Soc., Perkin Trans. 1, 1975, 1603 DOI: 10.1039/P19750001603
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