T=280°C;

With  sodium hydroxide 0.5 h;  Heating;   

Multi-step reaction with 2 steps 1: 1.) conc. HCl, NaNO2, 2.) sodium acetate / 1.) water, below 5 deg C, 2.) ethanol, water, 30 min2: 85 percent / 2N-aq. NaOH