1: 70 percent / HBr, H2O2 / H2O / 2 h / 10 °C 2: 1.) sodium nitrite, HCl; 2.) KI / 1.) H2O, 0 deg C; 2.) H2O, 30 min at RT then 1 hr at 60 deg C View Scheme

hydrogenchloride; potassium iodide; sodium nitrite 1.) H2O, 0 deg C; 2.) H2O, 30 min at RT then 1 hr at 60 deg C; Yield given. Multistep reaction;