Sodium Hydroxide → HCID 58137328, compound

Participants

Reaction Steps

Ethyl 1-benzoyl-3-benzylpiperidine-3-carboxylate (6.308 g; 18 mmol) was hydrolyzed with 1 N aq NaOH (220 mL) in ethanol (110 mL) for 20 h at rt. The ethanol was removed by rotary evaporation and the aqueous layer was extracted once with CH2Cl2. The pH of the aqueous layer was adjusted to pH=3-4 with 1 N aq HCl and extracted with CH2Cl2 (3×). The organic phase was dried over anhydrous Na2SO4, filtered and evaporated to give 1-benzoyl-3-benzylpiperidine-3-carboxylic acid (3.24 g, 55.7%). 1H NMR (CD3OD, 400 MHZ): δ=1.12 (m, 3H), 1.50˜1.72 (m, 4H), 2.18 (m, 1H), 2.75 (d, 1H), 3.05 (m, 1H), 3.16 (m, 1H), 4.08 (m, 2H), 7.08 (m, 2H), 7.22 (m, 3H), 7.48 (m, 5H).

Provenance & Evidence