1: ethanol / 2 h / Heating 2: 75.8 percent / Dowtherm A / 0.22 h / 248 - 249 °C 3: 1.) potassium carbonate / 1.) DMF, 100 deg C, 30 min; 2.) 100 deg C, 3 h 4: 72.9 percent / 15percent HCl / ethanol / 0.25 h / Heating 5: 87 percent / 10percent NaOH / ethanol / 4 h / Heating View Scheme

hydrogenchloride in methanol 2 h; Heating;

1: 54.6 percent / 13percent ammonia / ethanol / 15 h / 100 - 110 °C / autoclave 2: 95 percent / acetic acid / 0.5 h / 90 °C 3: zinc powder, acetic acid / ethanol / 0.17 h / Heating 4: 42percent tetrafluoroboric acid, sodium nitrite / ethanol; H2O / 0.17 h / -7 - -4 °C 5: 82.3 percent / toluene / 4 h / Heating 6: 10percent HCl / methanol / 2 h / Heating View Scheme

1: 95 percent / acetic acid / 0.5 h / 90 °C 2: zinc powder, acetic acid / ethanol / 0.17 h / Heating 3: 42percent tetrafluoroboric acid, sodium nitrite / ethanol; H2O / 0.17 h / -7 - -4 °C 4: 82.3 percent / toluene / 4 h / Heating 5: 10percent HCl / methanol / 2 h / Heating View Scheme

1: 42percent tetrafluoroboric acid, sodium nitrite / ethanol; H2O / 0.17 h / -7 - -4 °C 2: 82.3 percent / toluene / 4 h / Heating 3: 10percent HCl / methanol / 2 h / Heating View Scheme

1: zinc powder, acetic acid / ethanol / 0.17 h / Heating 2: 42percent tetrafluoroboric acid, sodium nitrite / ethanol; H2O / 0.17 h / -7 - -4 °C 3: 82.3 percent / toluene / 4 h / Heating 4: 10percent HCl / methanol / 2 h / Heating View Scheme