potassium phosphate; tris-(dibenzylideneacetone)dipalladium(0); di-tert-butyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine in 1,1-dimethylpropan-1-ol T=80°C; 15 h; Inert atmosphere;

potassium phosphate; N-[2'-(dicyclohexylphosphino)-1,1'-biphenyl-2-yl]-N,N-dimethylamine; tris-(dibenzylideneacetone)dipalladium(0) in toluene T=105°C; 24 h;

potassium carbonate in acetonitrile

in diethyl ether dry ether, refluxed 3 h;