P2S5 in methylene chloride containing pyridine reduces allenyl phenyl sulphoxides to sulphides; the difficult hydrolysis of the latter is eased by the introduction of a methoxy group into the benzene ring and this method then becomes a practicable synthesis of αβ-unsaturated ketones.
R. C. Cookson and P. J. Parsons, J. Chem. Soc., Chem. Commun., 1978, 822 DOI: 10.1039/C39780000822
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