in benzene Condensation; 3 h; Heating;

palladium diacetate; caesium carbonate; 2,2'-bis-(diphenylphosphino)-1,1'- binaphthyl in toluene T=80°C; 14 h; Inert atmosphere;

1: copper(l) iodide; tetra-(n-butyl)ammonium iodide; caesium carbonate / acetonitrile / 72 h / 65 °C / Inert atmosphere 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 0.5 h / 20 °C / Inert atmosphere 3: palladium diacetate; caesium carbonate; 2,2'-bis-(diphenylphosphino)-1,1'- binaphthyl / toluene / 14 h / 80 °C / Inert atmosphere View Scheme