ChemInform Abstract: Reaction of β,β-Dichlorovinyl Methyl Ketone with the Salts of Vinylidenedithiols.

The reaction between the ketone (I) and the sodium vinylidenedithiolate (II) is found to proceed either via attack of (II) on the α carbon atom of the vinyl group of (I) to give the 1,3-dithiolane (III) or via attack of (II) on the β carbon atom of the vinyl group of (I) to give the 1,3-dithietane (IV), depending on the solvent.