1: 1.) nitrosyl chloride, anhydrous potassium acetate, 2.) anhydrous sodium carbonate / 1.) acetic anhydride, acetic acid, 30 min, 2.) benzene, 2 h, reflux 2: 92 percent / 10percent hydrochloric acid / 0.5 h / Heating View Scheme

in toluene T=100°C; 2 h;