1-Hydroxybenzotriazole → Biphenyl-4-carboxylic acid (2-{4-[methyl-(2-trifluoromethyl-phenyl)-amino]-piperidin-1-yl}-2-oxo-ethyl)-amide

Participants

Reaction Steps

To a stirred solution of [(biphenyl-4-carbonyl)-amino]-acetic acid (0.075 g, 0.00029 mol) in DMF (3 mL), was added DIPEA (0.1519 g, 0.00117 mol), HOBt (0.03981 g, 0.00029 mol) and EDCI.HCl (0.06758 g, 0.00035 mol) at ambient temperature. After 2 minutes methyl-piperidin-4-yl-(2-trifluoromethyl-phenyl)-amine hydrochloride (0.06959 g, 0.00026 mol) was added and the resulting mixture was stirred at the same temperature overnight. The reaction mixture was diluted with cold water and the product was extracted with ethyl acetate. The ethyl acetate layer was washed aqueous sodium bicarbonate solution followed by brine solution, dried over sodium sulfate and concentrated under reduced pressure. The resulting residue was purified by preparative HPLC to afford 0.023 g (16%) of biphenyl-4-carboxylic acid (2-{4-[methyl-(2-trifluoromethyl-phenyl)-amino]-piperidin-1-yl}-2-oxo-ethyl)-amide. LCMS: 496.2 (M+1)+, 98.28%, 1H NMR (DMSO-d6): δ 8.6 (t, 1H), 7.56-7.3 (m, 4H), 7.8-7.6 (m, 7H), 7.98 (d, 2H), 4.4 (bs, 1H), 4.15 (d, 2H), 3.9 (bs, 1H), 3.2-2.9 (m, 2H), 1.7 (bs, 2H), 1.5-1.2 (m, 2H).

Provenance & Evidence