1: 83 percent / Na2CO3, NaIO4, KMnO4 / H2O; tetrahydrofuran / 0.5 h / Ambient temperature 2: 55 percent / NaIO4 / methanol; H2O; benzene / 50 h / Ambient temperature 3: 85 percent / toluene / 1 h / 110 °C View Scheme