aluminium trichloride in benzene 3 h; Heating;

1: NaNO2, 1N HCl / H2O / 1 h / Ambient temperature 2: 78 percent / l'acetate de sodium / ethanol; H2O / 3 h / 0 °C 3: 93 percent / 40percent NaOH / H2O; dioxane / 1 h / Ambient temperature 4: 61 percent / AlCl3 / benzene / 3 h / Heating View Scheme

1: 93 percent / 40percent NaOH / H2O; dioxane / 1 h / Ambient temperature 2: 61 percent / AlCl3 / benzene / 3 h / Heating View Scheme