A REGIO- AND STEREO-CONTROLLED SYNTHESIS OF α,β-UNSATURATED CARBONYL COMPOUNDS

Article abstract of DOI:10.1016/S0040-4039(00)98543-5

α,β-Unsaturated carbonyl compounds and butenolides are readily prepared by the rhodium(I) catalyzed isomerization of 1,3-diene monoepoxides and α-alkylidene-γ-butyrolactones, respectively.The former transformation is formally regarded as the equivalent of a regiospecific aldol condensation of an unsymmetrical ketone.