1.1: 86 percent / I2; Ph3P; imidazole / CH2Cl2 / 1 h / 20 °C 2.1: 85 percent / NaHCO3 / acetonitrile / 36 h / 40 °C 3.1: BuLi / hexane; tetrahydrofuran / 0.25 h / cooling 3.2: 60 percent / tetrahydrofuran; hexane / 0.25 h 4.1: 98 percent / H2 / chlorotris(triphenylphosphine)rhodium(I) / benzene; ethanol / 12 h 5.1: 83 percent / AcCl / methanol; CH2Cl2 / 2 h / 20 °C View Scheme