Synthesis of sterically encumbered biaryls by [3+3] cyclocondensation reactions and synthesis of arylated pyrazoles bis(diaryl)sulfones and bis(alkenyl)pyridines by Pd(0) catalysed cross coupling reactions Sterically encumbered biaryls were prepared [3+3] cyclocondensation. Arylatde pyrazoles and bis(diaryl)sulfones were prepared by Suzuki Miyuara reaction in very good yield.Di(alkenyl)pyridines and bipyridyls were prepared by Heck reaction.Bipyridyls were the unexpected products.