1: 84.4 percent / LiAlH4 / tetrahydrofuran / 4 h / Heating 2: 85.1 percent / MnO2 / benzene / 6 h / Heating 3: 88.6 percent / piperidine acetate / toluene / Heating 4: 90 percent / LiAlH4 / tetrahydrofuran / Heating 5: 50percent aq. sulphuric acid / a. water removed, b. 130-140 deg C (15mm), 2h 6: 10percent aq. NaOH / Heating 7: 82.3 percent / Heating 8: POCl3 / toluene / 95 °C 9: NaBH4 / methanol / Ambient temperature View Scheme

1: 84.4 percent / LiAlH4 / tetrahydrofuran / 4 h / Heating 2: 85.1 percent / MnO2 / benzene / 6 h / Heating 3: 88.6 percent / piperidine acetate / toluene / Heating View Scheme

lithium aluminium tetrahydride in tetrahydrofuran 4 h; Heating;