1: 70 percent / 1.25 h / 118 - 124 °C 2: 95 percent / acetone / 3 h / Heating 3: 75 percent / 1N KOH / methanol / 5 h / 80 °C 4: 70 percent / NaIO4, OsO4, HCl / H2O / 15 h / Ambient temperature; pH= 2-4 View Scheme