potassium hydroxide in ethanol 3 h; Heating;

1: SOCl2 2: 92 percent / pyridine / 1 h / Ambient temperature 3: 91 percent / KOH / ethanol / 3 h / Heating View Scheme

1: 92 percent / pyridine / 1 h / Ambient temperature 2: 91 percent / KOH / ethanol / 3 h / Heating View Scheme

1: 1.) 5percent Na2CO3, NaNO2, 2.) NaN3 / 1.) H2O, 2.) H2O, r.t., 4 h 2: SOCl2 3: 92 percent / pyridine / 1 h / Ambient temperature 4: 91 percent / KOH / ethanol / 3 h / Heating View Scheme