Triethylamine → 1-{[5-(4-bromophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazol-3-yl]carbonyl}-4-phenylpiperidine-4-carboxamide

Participants

Reaction Steps

5-(4-bromophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxylic acid (1 eq, 130 mg, 0.306 mmol), 4-carbamoyl-4-phenylpiperidin-1-ium trifluoroacetate (1.1 eq, 69 mg, 0.337 mmol), benzotriazole-1-yl-oxytris(dimethylamino)phosphonium hexafluorophosphate (BOP) (1.1 eq., 149 mg, 0.337 mmol), and triethylamine (3 eq, 0.13 mL, 0.92 mmol) was stirred in tetrahydrofuran (5 mL) for 16 h. The reaction was concentrated in vacuo. The crude reaction material was then purified by silica gel column chromatography using 0-100% ethyl acetate/hexane to yield pure 1-{[5-(4-bromophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazol-3-yl]carbonyl}-4-phenylpiperidine-4-carboxamide (98 mg, 52%). 1H NMR (300 MHz, CHLOROFORM-d) d ppm 2.10 (dd, J=9.75, 3.63 Hz, 1H) 2.18 (s, 3H) 2.20-2.28 (m, 1H) 2.46 (d, J=14.03 Hz, 2H) 3.65 (t, J=10.31 Hz, 1H) 3.75-3.88 (m, 1H) 3.95-4.07 (m, 1H) 4.15-4.28 (m, 1H) 5.17-5.50 (m, 2H) 7.00 (d, J=8.38 Hz, 2H) 7.12-7.50 (m, 10H).

Provenance & Evidence