tris-(dibenzylideneacetone)dipalladium(0); tetrabutyl-ammonium chloride; benzenesulphinic acid sodium salt; potassium carbonate; N-[2'-(dicyclohexylphosphino)-1,1'-biphenyl-2-yl]-N,N-dimethylamine in 1-methyl-pyrrolidin-2-one T=150°C; 15 h; Sealed tubeInert atmosphere;