.alpha.-Oxo ketene dithioacetal chemistry. 3. A regio- and stereospecific lithium aluminum hydride reduction resulting in the formation of stereochemically defined .beta.-alkyl .gamma.-bis(methylthio) alcohols
-oxodithioacetals 2a-m are shown to undergo facile one pot thermal dehydration and dethioacetalization in the presence of dimethyl sulphoxide to afford the corresponding ene- and polyene aldehydes 5a-m and 6a-b in good yields. The probable mechanism of dethioacetalization with dimethyl sulphoxide has also been discussed.
.alpha.-Oxo ketene dithioacetal chemistry. 3. A regio- and stereospecific lithium aluminum hydride reduction resulting in the formation of stereochemically defined .beta.-alkyl .gamma.-bis(methylthio) alcohols