1: K2CO3 / methanol 2: 100 percent / N-bromosuccinimide / CH2Cl2 3: 97 percent / imidazole / dimethylformamide 4: 80 percent / OsO4, NMO / H2O; tetrahydrofuran 5: 100 percent / PPTS / acetone 6: 95 percent / Zn, AcOH / methanol 7: 97 percent / diphenyl ether / 0.5 h / Heating 8: 83 percent / PDC / CH2Cl2 9: 100 percent / DIBAL / toluene / -78 °C 10: 84 percent / diisopropyl azodicarboxylate, PPh3 / tetrahydrofuran 11: 90 percent / aq. HCl / methanol / 3 h / Ambient temperature View Scheme