1: H2 / PtO2 2: Et3N 3: NaN3 / dimethylformamide / Heating 4: LiAlH4 / tetrahydrofuran 5: K2CO3 6: 90 percent / NaH / dimethylformamide 7: TBAF / tetrahydrofuran 8: Et3N 9: LiI / tetrahydrofuran 10: Zn; AcOH / ethanol 11: 94 percent / NaBH4 / ethanol 12: bis(tricyclohexylphosphine)benzylideneruthenium(IV)dichlorid 13: H2 / PtO2 14: Bu3P; Py 15: NaH 16: H2O2 / H2O 17: CaCO3 / diphenyl ether / Heating 18: OsO4; NMO / H2O; tetrahydrofuran 19: Py 20: K2CO3 / methanol 21: 61 percent / KOH / methanol 22: 93 percent / HCl / H2O / Heating View Scheme