1: pyridine, piperidine 2: conc. H2SO4 3: H2 / 5percent Pd/C / ethanol / 45 °C 4: sodium wire / diethyl ether / 18 h / Ambient temperature 5: ethanol / 7 h / Heating 6: 79 percent / NaOH / H2O; ethanol / 60 °C 7: 40 percent / 2.) ethanolic hydrogen chloride / 5 h / 145 - 150 °C View Scheme

1: conc. H2SO4 2: H2 / 5percent Pd/C / ethanol / 45 °C 3: sodium wire / diethyl ether / 18 h / Ambient temperature 4: ethanol / 7 h / Heating 5: 79 percent / NaOH / H2O; ethanol / 60 °C 6: 40 percent / 2.) ethanolic hydrogen chloride / 5 h / 145 - 150 °C View Scheme

1: H2 / 5percent Pd/C / ethanol / 45 °C 2: sodium wire / diethyl ether / 18 h / Ambient temperature 3: ethanol / 7 h / Heating 4: 79 percent / NaOH / H2O; ethanol / 60 °C 5: 40 percent / 2.) ethanolic hydrogen chloride / 5 h / 145 - 150 °C View Scheme

hydrogenchloride T=145 - 150°C; 5 h;

1: sodium wire / diethyl ether / 18 h / Ambient temperature 2: ethanol / 7 h / Heating 3: 79 percent / NaOH / H2O; ethanol / 60 °C 4: 40 percent / 2.) ethanolic hydrogen chloride / 5 h / 145 - 150 °C View Scheme