[Bmim]PF6-promoted ligandless Suzuki-Miyaura coupling reaction of potassium aryltrifluoroborates in water.

The Suzuki-Miyaura coupling reactions of potassium aryltrifluoroborates with aryl bromides in water are promoted by the addition of [bmim]PF6 using Pd(OAc)2 as a catalyst and Na2CO3 as a base under air. The quantity of [bmim]PF6 used is crucial to the efficiency of the catalytic system. A wide range of biaryls and polyaryls can be easily prepared in good to excellent yields.