1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 4-phenyl-1H-pyrrole-2-carboxylic acid {2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-amide

Participants

Reaction Steps

DIPEA (155 mg, 0.2 mL, 1.19 mmol) was added to a stirred solution of 4-Phenyl-1H-pyrrole-2-carboxylic acid (50 mg, 0.26 mmol) in DMF (4 mL). HOBT (40 mg, 0.29 mmol) and EDCI (153 mg, 0.79 mmol) were then added at room temperature. After 2 minutes, 2-amino-1-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethanone hydrochloride salt (prepared by the method as described above) (103 mg, 0.29 mmol) was added and the resulting mixture was stirred at room temperature for 4 hrs. Cold water was then added and filtered the solid precipitated to afford 113 mg (87.59% yield) of 4-phenyl-1H-pyrrole-2-carboxylic acid {2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-amide. LCMS Purity: 92.52%. 1H NMR (DMSO-d6): δ 11.6 (s, 1H), 8.2-8.1 (bs, 1H), 7.9-7.72 (m, 2H), 7.7-7.64 (t, 1H), 7.6-7.5 (d, 3H), 7.38-7.28 (t, 3H), 7.24-7.1 (m, 2H), 4.2-4.04 (bd, 2H), 3.82-3.56 (m, 4H), 3.5-3.4 (bs, 2H), 3.2-3.1 (bd, 2H).

Provenance & Evidence