hydrogenchloride; potassium iodide; sodium nitrite 1.) 0-10 deg C, 3h, 2.) 1 h; Yield given. Multistep reaction;

1: 87 percent / Br2, CH3CO2H / 3 h / Ambient temperature 2: 1.) aq. NaNO2, aq. 22percent HCl, 2.) KI / 1.) 0-10 deg C, 3h, 2.) 1 h View Scheme