1: 66 percent / HCl / methanol / 12 h / Ambient temperature 2: 68 percent / H2SO4 / H2O / 12 h / Ambient temperature 3: 43 percent / AgNO3, NaOH / methanol; H2O / 12 h / 40 °C View Scheme

With  hydrogenchloride in  methanol 12 h;  Ambient temperature;