sulfuric acid in methanol 0.5 h; Heating;

1: 54 percent / Br2, sodium acetate / acetic acid / 2 h / Ambient temperature; excess of the solvent 2: 87 percent / 50percent H2SO4 / methanol / 0.5 h / Heating View Scheme

sulfuric acid; sodium nitrite anschliessendes Erwaermen;