1: 70 percent / n-butyllithium / tetrahydrofuran; hexane / 48 h / Ambient temperature 2: 1.) borane-methyl sulfide complex, 2.) hydrogen peroxide, sodium hydroxide / 1.) THF, room temperature, 3 h, 2.) water, 25 deg C; reflux, 1 h 4: sodium iodide / acetone / Heating 5: 60 percent / hydrochloric acid, glacial acetic acid / H2O / 0.5 h / 70 °C 6: sodium hydride / tetrahydrofuran / 4 h / 60 °C View Scheme