hydrogenchloride in 1,4-dioxane 5 h; Heating;

1: 59 percent / tetrabutylammonium hydrogen sulfate, NaOH / benzene; H2O / 1 h 2: 74 percent / 1 N NaOH, ethanol / 0.5 h / Ambient temperature 3: 73 percent / 0.5 N HCl / dioxane / 5 h / Heating View Scheme

1: 74 percent / 1 N NaOH, ethanol / 0.5 h / Ambient temperature 2: 73 percent / 0.5 N HCl / dioxane / 5 h / Heating View Scheme