1: MnO2 / CH2Cl2; benzene / 3 h 2: H2 / Pd(OH)2 / methanol / 2 h 3: 57 percent / n-BuLi / benzene / 12 h / 0 °C 4: 92 percent / pyridine / 3 h 5: 83 percent / NaBH4 / dimethylsulfoxide / 2 h / 80 °C View Scheme