ChemInform Abstract: Transition Metal Promoted Intramolecular Cyclizations of α,α‐Dichloro Esters and Acids.

Abstract Cyclization of the unsaturated α,α‐dichloro acids or esters (I) in the presence of the catalysts (II) yields the monocyclic carboxylic acid derivatives (III) and/or the bicyclic γ‐lactones (IV).