1: 78 percent / H2O / 40 h / Heating 2: 90 percent / 50percent HCl, NaNO2 / H2O 3: acetic anhydride / 3 h / Heating 4: 1) conc. HCl / 1) EtOH/H2O, 2h, reflux, 2) 30 min, reflux View Scheme

1: 90 percent / 50percent HCl, NaNO2 / H2O 2: acetic anhydride / 3 h / Heating 3: 1) conc. HCl / 1) EtOH/H2O, 2h, reflux, 2) 30 min, reflux View Scheme

1: acetic anhydride / 3 h / Heating 2: 1) conc. HCl / 1) EtOH/H2O, 2h, reflux, 2) 30 min, reflux View Scheme

hydrogenchloride 1) EtOH/H2O, 2h, reflux, 2) 30 min, reflux; Yield given. Multistep reaction;