1: 75 percent / NaHCO3 / H2O / 1 h / Ambient temperature 2: 1.) trifluoroacetic acid, 2.) Fe2SO4*7H2O, tert-butylhydroperoxide / 1.) acetic acid, H2O, -5 deg C, 2.) H2O 3: 40 percent / KOH / Raney-copper alloy / ethanol; H2O / 0.02 h / Heating View Scheme

iodine; sodium hydrogencarbonate; potassium iodide in water 0.5 h;