1.1: sodium hydroxide / ethanol; water / 0.5 h / 60 °C / Inert atmosphere 1.2: 12 h / 60 °C / Inert atmosphere 2.1: toluene / 24 h / 120 °C 3.1: hydrogenchloride / ethanol / 1.5 h / 80 °C / Reflux 3.2: pH 14 View Scheme

lithium aluminium tetrahydride in tetrahydrofuran 3 h; Reflux;