1.1: sodium hydroxide / 90 °C 2.1: ethanol; water / 15 - 65 °C 3.1: hydrogenchloride; sodium nitrite / water / 0.17 h 3.2: 1 h / 20 °C 3.3: pH 6 View Scheme
1.1: ethanol; water / 1.5 h / 15 - 65 °C 2.1: ammonia / water / 0.5 h / 25 - 30 °C / pH 8 - 9 3.1: hydrogenchloride; sodium nitrite / water / 0.17 h 3.2: 1 h / 20 °C 3.3: pH 6 View Scheme