sodium hydroxide in 1,4-dioxane

sodium hydroxide in 1,4-dioxane; water T=20°C; Heating / reflux;

1: 81 percent / 1.) 2 M aq. sodium hydroxide, 2.) hydrochloric acid / 0.5 h / 0 °C 2: 77 percent / triethylamine / acetone / 1 h / Heating 3: 40 percent / m-chloroperbenzoic acid / CH2Cl2 / 70 h / Heating 4: 80 percent / hydrogen / 5 percent Pd-C / ethanol / 4 h / 2250.2 Torr View Scheme