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Szcmmary Adducts of bis(pheny1thio) carbanions and , being ketones activated on aldehydes give unrearranged a-phenylthio-ketones on one side of the carbonyl group by an easily removable treatment with toluene-p-sulphonic acid.functional group (PhS), are useful synthetic intermediates' able to act as specific enol equivalents, or as precursors for

The Horner-Wittig reaction with sulphenylated allylphosphine oxides and the rearrangement and oxidation of a-hydroxy-bis(pheny1thio) acetals are used to make 1-and 2-phenylthiobutadienes respectively. DIELS-ALDER reactions with l-phenylthio (1-PhS) butadiene give cyclic ally1 sulphides (e.g., 1) from which allylic alcohols, cyclic dienes, or aromatic compounds can be made.l 2-PhS butadiene on the other hand gives cyclic vinyl sulphides (e.g., 2) which are potential ketones.2 Both these reactions ( 1 )(2)

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