1: 97 percent / imidazole / dimethylformamide 2: 80 percent / OsO4, NMO / H2O; tetrahydrofuran 3: 100 percent / PPTS / acetone 4: 95 percent / Zn, AcOH / methanol 5: 97 percent / diphenyl ether / 0.5 h / Heating 6: 83 percent / PDC / CH2Cl2 7: 100 percent / DIBAL / toluene / -78 °C 8: 84 percent / diisopropyl azodicarboxylate, PPh3 / tetrahydrofuran 9: 90 percent / aq. HCl / methanol / 3 h / Ambient temperature View Scheme