1: 85 percent / KOH / H2O / 1 h / Heating 2: thionyl chloride / benzene / 2 h / Heating 3: hydrogen / Pd-BaSO4, sulphur-quinoline poison / xylene / Heating 4: 90 percent / HCl (gas) / benzene / overnight 5: 70 percent / hydrogen / Pd-C / tetrahydrofuran / Ambient temperature 6: 45 percent / diethyl ether; tetrahydrofuran / 0.33 h 7: 90 percent / hydrazine hydrate / Raney-Ni / methanol / 1 h / Heating 8: 85 percent / pyridine / 6 h / Ambient temperature 9: 70 percent / PTSA / benzene / 0.5 h / Heating 10: 95 percent / liquor ammonia / methanol / 0.75 h View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: acetic acid; piperidine / ethanol / 3 h / |Reflux<br />2: alkali metal carbonate / N,N-dimethyl-formamide / |Reflux<br /> <br /> &nbsp;