palladium diacetate; caesium carbonate; 2-(dicyclohexylphosphino)-2',4',6'-tri-i-propyl-1,1’-biphenyl in toluene T=110°C; 6 h; Inert atmosphere;

1,1'-bis(diphenylphosphino)ferrocene; palladium diacetate; caesium carbonate in toluene T=110°C; 6 h; Inert atmosphere;