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

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

1: 82.3 percent / Heating 2: POCl3 / toluene / 95 °C 3: NaBH4 / methanol / Ambient temperature View Scheme

1: POCl3 / toluene / 95 °C 2: NaBH4 / methanol / Ambient temperature View Scheme

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