1: 70 percent / DDQ / 4 h / Heating 2: 98 percent / LiAlH4 / diethyl ether / 4 h / Heating 3: 90 percent / MnO2 / benzene / Heating View Scheme

1: 70 percent / DDQ / 4 h / Heating 2: 98 percent / LiAlH4 / diethyl ether / 4 h / Heating 3: 90 percent / MnO2 / benzene / Heating 4: 80 percent / piperidine acetate / toluene / Heating 5: 80 percent / LiAlH4 / tetrahydrofuran / Heating 6: 50percent aq. sulphuric acid / a. water removed, b. 130-140 deg C (15mm), 2h 7: 10percent aq. NaOH / Heating 8: 65 percent / Heating 9: POCl3 / toluene / 95 °C 10: NaBH4 / methanol / Ambient temperature View Scheme

1: 70 percent / DDQ / 4 h / Heating 2: 98 percent / LiAlH4 / diethyl ether / 4 h / Heating View Scheme