1: benzoyl chloride; sodium hydroxide / CH2Cl2; H2O / 1 h 2: 0.734 g / POCl3 / toluene / 2 h / Heating View Scheme

potassium carbonate; benzoyl chloride in dichloromethane; water T=0 - 20°C;

1: benzoyl chloride; potassium carbonate / dichloromethane; water / 0 - 20 °C 2: phosphorus oxytribromide / toluene / 3 h / 0 °C / |Reflux 3: palladium diacetate; 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene; caesium carbonate / toluene / 1.5 h / 120 °C / |Inert atmosphere; |Microwave irradiation 4: bis-triphenylphosphine-palladium(II) chloride; sodium acetate / N,N-dimethyl acetamide / 1 h / 150 °C / |Inert atmosphere; |Microwave irradiation View Scheme