Synthesis of α,β-Unsaturated Ketones Using Allylidenetriphenylphosphorane as a Three-carbon Unit

Article abstract of DOI:10.1246/cl.1992.2253

3-Alkoxycarbonyl-2-ethoxy-2-propenylidenetriphenylphosphorane reacts in turn with alkyl halides and aldehydes in the presence of base via a one-pot procedure to give moderate to good yields of conjugated enol ethers.Hydrolysis of the conjugated enol ethers and subsequent decarboxylation provide a novel route to α,β-unsaturated ketones.