4-(4-Chlorophenyl)piperidine

To a solution of 5.0 g (21.7 mmol) of 4-(4-chloro-phenyl)-1,2,3,6-tetrahydro-pyridine in 20 mL methanol are added 500 mg Pd/C. The reaction mixture is stirred for 7 h at ambient temperature and 10 psi hydrogen. After the catalyst is separated, the solvent is eliminated using the rotary evaporator. Further purification is carried out by column chromatography on silica gel (eluant: dichloromethane/methanol/ammonia=5:4.9:0.1) to afford 4-(4-Chlorophenyl)piperidine.