4-Nitrobenzoic Acid → HCID 25164321, compound

Participants

Reaction Steps

DIPEA (47 mg, 0.36 mmol) was added to a stirred solution of 2-amino-1-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethanone-TFA salt (62 mg, 0.14 mmol) in DMF (0.5 mL). HOBT (19 mg, 0.14 mmol) and EDCI.HCl (28 mg, 0.14 mmol) were added at room temperature. After 2 minutes, 4-nitro benzoic acid (20 mg, 0.12 mmol) was added. The resulting mixture was stirred at room temperature for four hours. Water was then added, and the product was extracted with EtOAc. The organic layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure to afford 40.7 mg (74% yield) of 4-Nitro-N-{2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-benzamide. LCMS Purity: 88.67%, HPLC Purity: 92.93%, 1H NMR (CDCl3): δ 8.3 (d, 2H), 8.0 (m, 2H), 7.8-7.7 (d, 1H), 7.6 (m, 2H), 7.4-7.3 (d, 2H), 4.4-4.3 (dd, 1H), 4.3-4.2 (dd, 2H), 4.1-3.9 (m, H), 3.8-3.7 (m, 2H), 3.6 (m, 2H), 3.4 (bt, 1H), 3.2 (m, 2H).

Provenance & Evidence