1: I2 / diethyl ether / 4 h / Ambient temperature 2: NaBH4 / methanol / 0.25 h / 0 °C 3: imidazole / dimethylformamide / 2.5 h / 50 °C 4: diisobutylaluminium hydride / CH2Cl2 / 0.08 h / -78 °C 5: pyridinium chlorochromate / CH2Cl2 / 2.5 h / Ambient temperature 6: 83 percent / 48percent aq. HF / acetonitrile / 2 h / Ambient temperature View Scheme

1: I2 / diethyl ether / 4 h / Ambient temperature 2: NaBH4 / methanol / 0.25 h / 0 °C 3: imidazole / dimethylformamide / 2.5 h / 50 °C 4: diisobutylaluminium hydride / CH2Cl2 / 0.08 h / -78 °C 5: pyridinium chlorochromate / CH2Cl2 / 2.5 h / Ambient temperature 6: 83 percent / 48percent aq. HF / acetonitrile / 2 h / Ambient temperature 7: 85 percent / pyridine / 4 h / Ambient temperature 8: t-BuOK / tetrahydrofuran 9: 100 percent / LiOH / propan-2-ol; H2O View Scheme

1: I2 / diethyl ether / 4 h / Ambient temperature 2: NaBH4 / methanol / 0.25 h / 0 °C View Scheme