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.
Oxytrifluoromethylation of multiple bonds using copper catalyst under mild conditions
作者:Hiromichi Egami、Ryo Shimizu、Mikiko Sodeoka
DOI:10.1016/j.tetlet.2012.07.134
日期:2012.10
Oxytrifluoromethylation reaction of styrene derivatives and alkynes with external and internal oxygen nucleophiles, catalyzed by copper (I) salts under mild conditions, was developed. Direct formation of a β-trifluoromethylstyrene derivative from a styrene derivative was also achieved by the reaction in the presence of a Brønsted acid. Further transformation of the oxytrifluoromethylated products was