2: diisobutylaluminium hydride / toluene / -78 °C 4: pyridine / CH2Cl2 / 0.5 h / 0 °C 5: 57 percent / p-toluenesulphonic acid / methanol / Ambient temperature 6: pyridine / CH2Cl2 7: 93 percent / K2CO3 / methanol / 0.17 h / 0 °C 8: p-toluenesulfonic acid / CH2Cl2 9: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 10: 85 percent / chromic acid 11: 68 percent / acetic acid / H2O View Scheme

2: pyridine / CH2Cl2 / 0.5 h / 0 °C 3: 57 percent / p-toluenesulphonic acid / methanol / Ambient temperature 4: pyridine / CH2Cl2 5: 93 percent / K2CO3 / methanol / 0.17 h / 0 °C 6: p-toluenesulfonic acid / CH2Cl2 7: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 8: 85 percent / chromic acid 9: 68 percent / acetic acid / H2O View Scheme

1: diisobutylaluminium hydride / toluene / -78 °C 3: pyridine / CH2Cl2 / 0.5 h / 0 °C 4: 57 percent / p-toluenesulphonic acid / methanol / Ambient temperature 5: pyridine / CH2Cl2 6: 93 percent / K2CO3 / methanol / 0.17 h / 0 °C 7: p-toluenesulfonic acid / CH2Cl2 8: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 9: 85 percent / chromic acid 10: 68 percent / acetic acid / H2O View Scheme

1: pyridine / CH2Cl2 / 0.5 h / 0 °C 2: 57 percent / p-toluenesulphonic acid / methanol / Ambient temperature 3: pyridine / CH2Cl2 4: 93 percent / K2CO3 / methanol / 0.17 h / 0 °C 5: p-toluenesulfonic acid / CH2Cl2 6: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 7: 85 percent / chromic acid 8: 68 percent / acetic acid / H2O View Scheme

1: p-toluenesulfonic acid / CH2Cl2 2: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 3: 85 percent / chromic acid 4: 68 percent / acetic acid / H2O View Scheme

1: pyridine / CH2Cl2 2: 93 percent / K2CO3 / methanol / 0.17 h / 0 °C 3: p-toluenesulfonic acid / CH2Cl2 4: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 5: 85 percent / chromic acid 6: 68 percent / acetic acid / H2O View Scheme

1: 57 percent / p-toluenesulphonic acid / methanol / Ambient temperature 2: pyridine / CH2Cl2 3: 93 percent / K2CO3 / methanol / 0.17 h / 0 °C 4: p-toluenesulfonic acid / CH2Cl2 5: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 6: 85 percent / chromic acid 7: 68 percent / acetic acid / H2O View Scheme

1: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 2: 85 percent / chromic acid 3: 68 percent / acetic acid / H2O View Scheme

1: 93 percent / K2CO3 / methanol / 0.17 h / 0 °C 2: p-toluenesulfonic acid / CH2Cl2 3: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 4: 85 percent / chromic acid 5: 68 percent / acetic acid / H2O View Scheme

1: 1.) -78 deg C, 5 min -> -20 deg C, 40 min 3: diisobutylaluminium hydride / toluene / -78 °C 5: pyridine / CH2Cl2 / 0.5 h / 0 °C 6: 57 percent / p-toluenesulphonic acid / methanol / Ambient temperature 7: pyridine / CH2Cl2 8: 93 percent / K2CO3 / methanol / 0.17 h / 0 °C 9: p-toluenesulfonic acid / CH2Cl2 10: 85 percent / KOH / H2O; ethanol / 2 h / 45 °C 11: 85 percent / chromic acid 12: 68 percent / acetic acid / H2O View Scheme