Acetic Acid → HCID 22278872, compound

Participants

Reaction Steps

Formaldehyde solution (47%, 10 g) was added to the stirred solution of 4-amino-1-benzyl-3,3-dimethylpiperidine (2.0 g, 9.2 mmol) in methanol (20 ml) at 0° C. and sodium cyanoborohydride (0.5 g, 9.2 mmol) was added to it. Then, acetic acid (2 ml) was added to the resulting mixture and stirring was continued for 24 hr at ambient temperature. The reaction mixture was concentrated to dryness, triturated with water, acidified with conc. HCl (pH 3˜4) and extracted with ethyl acetate to remove impurities. The aqueous layer was basified with 1 M sodium hydroxide solution (pH˜10) and extracted with ethyl acetate. Ethyl acetate extract was dried (Na2SO4) and concentrated to give 1-benzyl-4-dimethylamino-3,3-dimethylpiperidine. Yield 1.9 g (84%), C16H26N2, m/z 247 (M+1).

Provenance & Evidence