1: 80 percent / OsO4, NMO / H2O; tetrahydrofuran 2: 100 percent / PPTS / acetone 3: 95 percent / Zn, AcOH / methanol 4: 97 percent / diphenyl ether / 0.5 h / Heating 5: 83 percent / PDC / CH2Cl2 6: 100 percent / DIBAL / toluene / -78 °C 7: 84 percent / diisopropyl azodicarboxylate, PPh3 / tetrahydrofuran 8: 90 percent / aq. HCl / methanol / 3 h / Ambient temperature View Scheme