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