Highly efficient cross-coupling reactions with the perfluoroorganotrifluoroborate salts K [RFBF3] (RF=C6F5, CF2CF)

Potassium pentafluorophenyl- and trifluorovinyltrifluoroborates, both containing electron-poor organo groups, reacted with iodobenzene and p-substituted iodobenzenes in the presence of palladium compounds and stoichiometric amounts of silveroxide to the fluorinated cross-coupling products in very good yields. Substituted bromobenzenes were less efficient substrates.