1: KOH; ethanol / 4 h 2: nBu4NCN / 8 h / 75 °C 3: 45 percent / ozone, sodium bicarbonate / ethyl acetate / 8 h / 0 °C 4: 92 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature 5: conc. HCl / CH2Cl2 / 31 h 6: AIBN, tri-n-butyltin hydride / toluene / 2 h / Heating 7: 93 percent / ozone / ethyl acetate / 0.5 h / -78 °C 8: SOCl2 / methanol / 2 h 9: 99 percent / NaBH4, CeCl3*7H2O / methanol / 0.08 h 10: 92 percent / PBr3 / petroleum ether / 1 h / 0 °C 11: 1) NaI, 2) NaBH4 / 1) DMSO, r.t., 15 min, 2) MeOH, 1.5 h 12: 90 percent / DIBAL-H / benzene; toluene / 2 h / 0 °C View Scheme

1: KOH; ethanol / 4 h 2: nBu4NCN / 8 h / 75 °C 3: 45 percent / ozone, sodium bicarbonate / ethyl acetate / 8 h / 0 °C 4: 92 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature 5: conc. HCl / CH2Cl2 / 31 h 6: AIBN, tri-n-butyltin hydride / toluene / 2 h / Heating 7: 93 percent / ozone / ethyl acetate / 0.5 h / -78 °C 8: SOCl2 / methanol / 2 h 9: 99 percent / NaBH4, CeCl3*7H2O / methanol / 0.08 h 10: 75 percent / p-toluenesulphonic acid / toluene / 30 h / Heating 11: 63 percent / DIBAL-H / benzene / 2.5 h / Ambient temperature 12: tetrahydrofuran / 0.17 h / 0 °C 13: 100 percent / MnO2 / petroleum ether / 1 h View Scheme

1: KOH; ethanol / 4 h 2: nBu4NCN / 8 h / 75 °C 3: 45 percent / ozone, sodium bicarbonate / ethyl acetate / 8 h / 0 °C 4: 92 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature 5: conc. HCl / CH2Cl2 / 31 h 6: AIBN, tri-n-butyltin hydride / toluene / 2 h / Heating 7: 93 percent / ozone / ethyl acetate / 0.5 h / -78 °C 8: SOCl2 / methanol / 2 h 9: 99 percent / NaBH4, CeCl3*7H2O / methanol / 0.08 h 10: 92 percent / PBr3 / petroleum ether / 1 h / 0 °C 11: 1) NaI, 2) NaBH4 / 1) DMSO, r.t., 15 min, 2) MeOH, 1.5 h View Scheme

1: KOH; ethanol / 4 h 2: nBu4NCN / 8 h / 75 °C 3: 45 percent / ozone, sodium bicarbonate / ethyl acetate / 8 h / 0 °C 4: 92 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature 5: conc. HCl / CH2Cl2 / 31 h 6: AIBN, tri-n-butyltin hydride / toluene / 2 h / Heating 7: 93 percent / ozone / ethyl acetate / 0.5 h / -78 °C 8: SOCl2 / methanol / 2 h 9: 99 percent / NaBH4, CeCl3*7H2O / methanol / 0.08 h 10: 75 percent / p-toluenesulphonic acid / toluene / 30 h / Heating 11: 63 percent / DIBAL-H / benzene / 2.5 h / Ambient temperature View Scheme

1: KOH; ethanol / 4 h 2: nBu4NCN / 8 h / 75 °C 3: 45 percent / ozone, sodium bicarbonate / ethyl acetate / 8 h / 0 °C 4: 92 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature 5: conc. HCl / CH2Cl2 / 31 h 6: AIBN, tri-n-butyltin hydride / toluene / 2 h / Heating 7: 93 percent / ozone / ethyl acetate / 0.5 h / -78 °C 8: SOCl2 / methanol / 2 h 9: 99 percent / NaBH4, CeCl3*7H2O / methanol / 0.08 h 10: 75 percent / p-toluenesulphonic acid / toluene / 30 h / Heating View Scheme

1: KOH; ethanol / 4 h 2: nBu4NCN / 8 h / 75 °C 3: 45 percent / ozone, sodium bicarbonate / ethyl acetate / 8 h / 0 °C 4: 92 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature 5: conc. HCl / CH2Cl2 / 31 h 6: AIBN, tri-n-butyltin hydride / toluene / 2 h / Heating 7: 93 percent / ozone / ethyl acetate / 0.5 h / -78 °C 8: SOCl2 / methanol / 2 h 9: 99 percent / NaBH4, CeCl3*7H2O / methanol / 0.08 h 10: 92 percent / PBr3 / petroleum ether / 1 h / 0 °C 11: 1) NaI, 2) NaBH4 / 1) DMSO, r.t., 15 min, 2) MeOH, 1.5 h View Scheme