Reusable,Polymer-Supported,Palladium-Catalyzed,Atom-Efficient Coupling Reaction of Aryl Halides with Sodium Tetraphenylborate in Water by Focused Microwave Irradiation

摘要

A rapid and efficient cross-coupling reaction of sodium tetraphenylborate with aryl bromides was carried out in water at 120 °C in the presence of a polymer-supported palladium catalyst and potassium carbonate under focused microwave irradiation.All four phenyl groups of sodium tetraphenylborate participated in the reaction and produced polyfunc-tional biaryls in excellent yields.The polymeric catalyst can be easily separated from the reaction mixture and reused more than 10 times without showing any decrease in activity.