1: 92 percent / Amberlyst H-15 / methanol / 1 h / 45 °C 2: 95 percent / LiAlH4 / tetrahydrofuran / 1 h / Heating 3: MnO2 / CH2Cl2 / 6 h / Ambient temperature 4: 1.) Mg/Hg / 1.) Et2O, 30 min, 2.) room temp., 1 h 5: 98 percent / pyridine / 1 h 6: 88 percent / N2H4*H2O, H2O2 / ethanol / 12 h / 50 - 60 °C View Scheme

1: 92 percent / Amberlyst H-15 / methanol / 1 h / 45 °C 2: 95 percent / LiAlH4 / tetrahydrofuran / 1 h / Heating 3: MnO2 / CH2Cl2 / 6 h / Ambient temperature 4: 1.) Mg/Hg / 1.) Et2O, 30 min, 2.) room temp., 1 h View Scheme

1: 92 percent / Amberlyst H-15 / methanol / 1 h / 45 °C 2: 95 percent / LiAlH4 / tetrahydrofuran / 1 h / Heating 3: MnO2 / CH2Cl2 / 6 h / Ambient temperature View Scheme

1: 92 percent / Amberlyst H-15 / methanol / 1 h / 45 °C 2: 95 percent / LiAlH4 / tetrahydrofuran / 1 h / Heating View Scheme