Generation of the<i>α</i>-Sulfinyl Carbenoid from<i>α</i>-Chloro Sulfoxides: A New Method for One-Carbon Homologation of Ketones to<i>α</i>-Sulfinyl Ketones
carbenoids were successfully used in a new method for homologation of ketones to α-sulfinyl ketones. Treatment of the carbanion of chloromethyl phenyl sulfoxide with ketones gave the adducts, α-chloro β-hydroxy sulfoxides, in nearly quantitative yields. The adducts were treated with excess lithium diisopropylamide to give one-carbon homologated α-sulfinyl ketones via α-sulfinyl β-oxido carbenoids in moderate
Lithio iodomethyl phenylsulfoxides reacted with alkyl halides and carbonyl compounds to give adducts in good to moderate yields. Solvolysis of the carbonyl adducts led to sulfones or the ring expanded product.