1: With KF*2H2O; copper(II) bis(trifluoromethanesulfonate); 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene in toluene T=-20 - 20°C; 6 h; Inert atmosphere; 2: With oxygen in toluene T=20 - 120°C; 24.5 h;

potassium phosphate; palladium diacetate T=20°C; 5 h;