hydrogenchloride in ethanol; water T=100°C; 0.5 h;

Multi-step reaction with 4 steps 1.1: sodium tetrahydroborate; acetic acid / 1,4-dioxane / 3.5 h / 10 - 105 °C2.1: hydrogenchloride / water / 30 °C2.2: 1 h / 0 - 20 °C2.3: 1 h3.1: sodium hydroxide / ethanol; water / 0.5 h / 60 °C / Inert atmosphere3.2: 12 h / 60 °C / Inert atmosphere4.1: toluene / 24 h / 120 °C