1: 57 percent / second generation Grubbs' catalyst / CH2Cl2 / 48 h / 50 - 55 °C 2: 89 percent / 2,6-lutidine; DMAP / pyridine / 1 h / 0 - 20 °C 3: 78 percent / pyridine; OsO4 / tetrahydrofuran / 5 h / 0 °C 4: 95 percent / pyridine / CH2Cl2 / 2 h / 0 °C 5: 84 percent / BnNMe3OH / methanol; tetrahydrofuran / 1 h / 0 °C 6: n-BuLi; WCl6 / tetrahydrofuran; hexane / 0 - 20 °C 7: 12 mg / pyridinum p-toluenesulfonate / methanol / 6 h / 0 °C 8: 69 percent / Dess-Martin periodinane; pyridine / CH2Cl2 / 0 - 20 °C 9: 40 percent / aq. HF / acetonitrile / 0 - 20 °C View Scheme