Potassium Carbonate → 5-[(3-Benzyl)-1-piperidinyl]valeric acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-benzylpiperidine hydrochloride (2 g, 9.4 mmol) in DMF (40 mL) were added methyl 5-bromovalerate (1.6 mL, 11.3 mmol) and potassium carbonate (3.2 g, 23.6 mmol). This heterogeneous mixture was heated at 110° C. for 1 hr then cooled at 25° C., diluted with water (200 mL) and diethyl ether (200 mL). The aqueous solution was extracted with diethyl ether (100 mL) and the collected organic phase was washed with brine (200 mL), dried and concentrated in vacuum. The crude compound was purified by silica gel column chromatography using CH2Cl2/MeOH as eluant to afford the title compound as an oil (1.76 g, 65%). 1H-NMR (CDCl3): 0.8-1.0 (m, 1H); 1.4-1.7 (m, 8H); 1.8-1.95 (m, 2H); 2.25-2.35 (m, 4H); 2.4-2.6 (m, 2H); 2.75-2.9 (m, 2H); 3.65 (s, 3H); 7.132 (d, J=7.0, 2H); 7.186 (d, J=7.2, 1H); 7.264 (t, J=7.2, 2H).

Provenance & Evidence