Selective Addition of Unsaturated Carboxylic Acids to Terminal Acetylenes Catalyzed by Bis(η5-cyclooctadienyl)ruthenium(II)-Tri-n-butylphosphine. A Novel Synthesis of Enol Esters

Article abstract of DOI:10.1021/jo00209a051

Unsaturated carboxylic acids such as methacrylic acid, crotonic acid, vinylacetic acid, and sorbic acid and aromatic carboxylic acids reacted with terminal acetylenes in the presence of a catalytic amount of bis(η⁵-cyclooctadienyl)ruthenium-P-n