1: 1.) t-BuLi, 2.) FeCl3 / 1.) THF, -78 deg, 2.) -78 deg to 20 deg 2: 1.) TBAF, 2.) H2 / 2.) Pd/C / 1.) THF, 2.) THF, MeOH 3: 65 percent / K3Fe(CN)6, NaOH / H2O; ethanol; tetrahydrofuran / 20 °C 4: 54 percent / DMAP, pyridine 5: aq. HCl View Scheme