1: 25 percent / copper / 6 h / 220 - 240 °C 2: 76 percent / hydrobromic acid, acetic acid / 18 h / Heating 3: 26 percent / acetic acid, water, sodium nitrite / 5 °C 4: 97 percent / 1 N sodium carbonate, sodium dithionite / 5 h / 35 °C 5: methanol 6: 84 percent / ethanol; H2O / Heating 7: 6 N aq. HCl / Heating 8: ethanol / Heating View Scheme

1: 25 percent / copper / 6 h / 220 - 240 °C 2: 76 percent / hydrobromic acid, acetic acid / 18 h / Heating 3: 26 percent / acetic acid, water, sodium nitrite / 5 °C 4: 97 percent / 1 N sodium carbonate, sodium dithionite / 5 h / 35 °C 5: methanol 6: 84 percent / ethanol; H2O / Heating 7: 6 N aq. HCl / Heating 8: ethanol / Heating View Scheme

1: 26 percent / acetic acid, water, sodium nitrite / 5 °C 2: 97 percent / 1 N sodium carbonate, sodium dithionite / 5 h / 35 °C 3: methanol 4: 84 percent / ethanol; H2O / Heating 5: 6 N aq. HCl / Heating 6: ethanol / Heating View Scheme

1: 76 percent / hydrobromic acid, acetic acid / 18 h / Heating 2: 26 percent / acetic acid, water, sodium nitrite / 5 °C 3: 97 percent / 1 N sodium carbonate, sodium dithionite / 5 h / 35 °C 4: methanol 5: 84 percent / ethanol; H2O / Heating 6: 6 N aq. HCl / Heating 7: ethanol / Heating View Scheme

1: 97 percent / 1 N sodium carbonate, sodium dithionite / 5 h / 35 °C 2: methanol 3: 84 percent / ethanol; H2O / Heating 4: 6 N aq. HCl / Heating 5: ethanol / Heating View Scheme

1: methanol 2: 84 percent / ethanol; H2O / Heating 3: 6 N aq. HCl / Heating 4: ethanol / Heating View Scheme

1: 84 percent / ethanol; H2O / Heating 2: 6 N aq. HCl / Heating 3: ethanol / Heating View Scheme

1: 6 N aq. HCl / Heating 2: ethanol / Heating View Scheme

in ethanol Heating; Yield given;