1: 54 percent / toluene / 2 h / 100 °C 2: 1.) phosphorus pentaoxide, potassium acetate, nitrosyl chloride, 2.) sodium carbonate / 1.) acetic acid, 30 min, 2.) benzene, 2 h, reflux 3: 31 percent / 3 h / Heating View Scheme

sodium hydride in N,N-dimethyl-formamide Heating;

1: 1.) phosphorus pentaoxide, potassium acetate, nitrosyl chloride, 2.) sodium carbonate / 1.) acetic acid, 30 min, 2.) benzene, 2 h, reflux 2: 31 percent / 3 h / Heating View Scheme

potassium acetate; sodium carbonate; nitrosyl chloride 1.) acetic anhydride, acetic acid, 30 min, 2.) benzene, 2 h, reflux; Yield given. Multistep reaction;

3 h; Heating;