反应详情

(-)-N-benzyl-3-(3-methoxyphenyl)piperidine hydrochloride (3.8 g, 0.0120 mol) was dissolved in ethanol (80 ml), 10% Pd/C was added and the mixture was hydrogenated at room temperature and atmospheric pressure (28 h). The catalyst was removed (Celite) by filtration, the solvent was evaporated off and the crystalline residue was recrystallized from methanol-ether giving the desired (+)-3-(3-methoxyphenyl)-piperidine hydrochloride (2.54 g, 30% total yield of the maximal theoretical) m.p. 175.5°-177° C.; [α]22D+10.1° (C 2.1, CH3OH).

1. customwas hydrogenated at room temperature
2. customatmospheric pressure (28 h)
3. customThe catalyst was removed (Celite)
4. filtrationby filtration
5. customthe solvent was evaporated off
6. customthe crystalline residue was recrystallized from methanol-ether giving the desired (+)-3-(3-methoxyphenyl)-piperidine hydrochloride (2.54 g, 30% total yield of the maximal theoretical) m.p. 175.5°-177° C.