The dianion of the β-keto-sulphoxide (1) can be alkylated exclusively on the γ-carbon atom with a variety of alkyl halides; the resultant α-phenylsulphinyl ketones (3) undergo ready elimination of benzenesulphenic acid providing a new general route to alkyl vinyl ketones.
P. A. Grieco, D. Boxler and C. S. Pogonowski, J. Chem. Soc., Chem. Commun., 1974, 497 DOI: 10.1039/C39740000497
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