hydrogenchloride; acetic acid; sodium nitrite in water 72 h; Ambient temperature;

1: 1.) HCl / 1.) -20 deg C, 15 h, 2.) H2O, room temp., 4 h 2: 30 percent / glacial HAc, 2 N HCl, NaNO2 / H2O / 72 h / Ambient temperature View Scheme

1: 73 percent / 18-crown-6 / dioxane / 60 h / Ambient temperature 2: 1.) HCl / 1.) -20 deg C, 15 h, 2.) H2O, room temp., 4 h 3: 30 percent / glacial HAc, 2 N HCl, NaNO2 / H2O / 72 h / Ambient temperature View Scheme