1: 120 mg / ceric ammonium nitrate / methanol; H2O; CH2Cl2 / 0.08 h / -20 °C 2: 46 percent / tributyltin hydride; AIBN / benzene / 80 °C 3: 31 mg / potassium hydrogen carbonate; hydrogen peroxide / methanol; tetrahydrofuran / 19 h / 66 °C View Scheme