2: I2, PPh3, imidazole / CH2Cl2 / 1 h / Ambient temperature 3: NaHCO3 / acetonitrile / 24 h / 45 °C 4: 1.) n-BuLi / 1.) THF, 0 deg C, 0.5 h, 2.) THF, 0 deg C -> room temp., 1 h 5: H2, Rh(PPh3)3Cl / benzene; ethanol / 2 h / Ambient temperature 6: acetyl chloride / methanol; diethyl ether / 6 h / Heating View Scheme