Ligand exchange reaction of sulfoxides in organic synthesis: A new method for generation of magnesium enolates of α-chloro carboxylic acids and their derivatives
Treatment of α-chloro α-sulfinyl carboxylic acid derivatives with EtMgBr in THF at low temperature gave magnesium enolates of the α-chloro carboxylic acid derivatives. The enolates reacted with ketones and aldehydes to afford aldol compounds (or α,β-epoxy acids) in good yields.