Palladium-catalysed Carbonylation of Halogenoalkynes to Alkynylcarboxylic Acid Esters under Mild Conditions

Palladium-catalysed carbonylation reactions of bromoalkynes and iodoalkynes, as well as the carbonylation reaction of σ-alkynylpalladium(II) complexes under atmospheric pressure of carbon monoxide lead to formation of alkynylcarboxylic acid esters.