Ruthenium-Catalyzed Regio- and Stereoselective Addition of Carboxylic Acids to Aryl and Trifluoromethyl Group Substituted Unsymmetrical Internal Alkynes
The regio- and stereoselective addition of carboxylicacids to aryl and trifluoromethyl group substituted unsymmetrical internal alkynes has been accomplished: the Ru3(CO)12/3PPh3 catalyst system has effectively catalyzed the reaction to afford the trifluoromethyl group substituted (E)-enol esters with high regio- and stereoselectivities.