1.1: sodium hydroxide / 1,4-dioxane; water / 0 - 20 °C 2.1: sodium hydride / N,N-dimethyl-formamide / 2 h / 20 °C 2.2: 16 h / 60 °C 3.1: hydrogenchloride; water / tetrahydrofuran / 1 h / Reflux View Scheme

in methanol T=20°C; 3 h;