sulfuric acid; water; acetic acid 3.5 h; Heating;

1: ethanol; H2O / 12 h / Heating 2: conc. H2SO4 / aq. acetic acid / 5 h / Heating View Scheme

1: 78 percent / conc. HCl / 1) 70 deg C to 80 deg C, 7 h, 2) 20 deg C, 12 h 2: 82 percent / conc. HCl, Fe / 4.5 h / Heating 3: 80 percent / NaH / tetrahydrofuran / Heating 4: 68 percent / 48percent HBr / acetic acid / 4 h / 80 °C 5: ethanol; H2O / 12 h / Heating 6: conc. H2SO4 / aq. acetic acid / 5 h / Heating View Scheme

1: 82 percent / conc. HCl, Fe / 4.5 h / Heating 2: 80 percent / NaH / tetrahydrofuran / Heating 3: 68 percent / 48percent HBr / acetic acid / 4 h / 80 °C 4: ethanol; H2O / 12 h / Heating 5: conc. H2SO4 / aq. acetic acid / 5 h / Heating View Scheme

1: 80 percent / NaH / tetrahydrofuran / Heating 2: 68 percent / 48percent HBr / acetic acid / 4 h / 80 °C 3: ethanol; H2O / 12 h / Heating 4: conc. H2SO4 / aq. acetic acid / 5 h / Heating View Scheme

1: 68 percent / 48percent HBr / acetic acid / 4 h / 80 °C 2: ethanol; H2O / 12 h / Heating 3: conc. H2SO4 / aq. acetic acid / 5 h / Heating View Scheme