1: 90 percent / NaBH4; CeCl3 / methanol / 0 °C 2: H2 / PtO2 3: Et3N 4: NaN3 / dimethylformamide / Heating 5: LiAlH4 / tetrahydrofuran 6: K2CO3 7: 90 percent / NaH / dimethylformamide 8: TBAF / tetrahydrofuran 9: Et3N 10: LiI / tetrahydrofuran 11: Zn; AcOH / ethanol 12: 94 percent / NaBH4 / ethanol 13: bis(tricyclohexylphosphine)benzylideneruthenium(IV)dichlorid 14: H2 / PtO2 15: Bu3P; Py 16: NaH 17: H2O2 / H2O 18: CaCO3 / diphenyl ether / Heating 19: OsO4; NMO / H2O; tetrahydrofuran 20: Py 21: K2CO3 / methanol 22: 61 percent / KOH / methanol 23: 93 percent / HCl / H2O / Heating View Scheme