1: Pearlman's catalist; sulfuric acid; hydrogen; trifluoroacetic acid / 24 h / 20 °C / 5171.62 Torr 2: water; potassium hydroxide / methanol / 24 h / Reflux 3: ethanol; water / 1 h / 20 °C 4: acetic acid / 2 - 4 h / 100 °C 5: sodium tetrahydroborate / dichloromethane; water; isopropyl alcohol / 16 h / 20 - 25 °C View Scheme

1: water; potassium hydroxide / methanol / 24 h / Reflux 2: ethanol; water / 1 h / 20 °C 3: acetic acid / 2 - 4 h / 100 °C 4: sodium tetrahydroborate / dichloromethane; water; isopropyl alcohol / 16 h / 20 - 25 °C View Scheme

1: 1,3,5,7-tetra-azatricyclo[5.1.1.13,5]decane / 18 h / 115 °C 2: 1,4-diaza-bicyclo[2.2.2]octane / 16 h / Reflux 3: sulfuric acid / acetic acid / 1 h / 100 °C 4: sodium hypochlorite; sodium hydroxide / methanol / 24 h / 25 °C 5: hydrogen / methanol / 20 h / 80 °C / 22502.3 Torr 6: water; potassium hydroxide / methanol / 24 h / Reflux 7: ethanol; water / 1 h / 20 °C 8: acetic acid / 2 - 4 h / 100 °C 9: sodium tetrahydroborate / dichloromethane; water; isopropyl alcohol / 16 h / 20 - 25 °C View Scheme

1: 1,4-diaza-bicyclo[2.2.2]octane / 16 h / Reflux 2: sulfuric acid / acetic acid / 1 h / 100 °C 3: sodium hypochlorite; sodium hydroxide / methanol / 24 h / 25 °C 4: hydrogen / methanol / 20 h / 80 °C / 22502.3 Torr 5: water; potassium hydroxide / methanol / 24 h / Reflux 6: ethanol; water / 1 h / 20 °C 7: acetic acid / 2 - 4 h / 100 °C 8: sodium tetrahydroborate / dichloromethane; water; isopropyl alcohol / 16 h / 20 - 25 °C View Scheme