1: 65.2 percent / Br2 / acetic acid / 12 h / Ambient temperature 2: 1.) NaNO2, H2SO4, 2.) CuCl, conc. HCl / 1.) glacial CH3COOH, 0 deg C, 2.) CH3COOH, r.t., overnight; 80 deg C, 2 h View Scheme

hydrogenchloride; sulfuric acid; copper(l) chloride; sodium nitrite 1.) glacial CH3COOH, 0 deg C, 2.) CH3COOH, r.t., overnight; 80 deg C, 2 h; Yield given. Multistep reaction;