1-Hydroxybenzotriazole → N-biphenyl-4-yl-3-oxo-3-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-propionamide

Participants

Reaction Conditions

Reaction Steps

HOBt (19 mg, 0.14 mmol) and DIPEA (0.017 mg, 0.14 mmol) were added to a stirred solution of N-biphenyl-4-yl-malonamic acid (40 mg, 0.14 mmol) in DMF (3 mL). The mixture was cooled to 10° C. and EDCI.HCl (40 mg, 0.2 mmol) followed by piperazin-1-yl-(2-trifluoromethyl-phenyl)-methanone hydrochloride (45 mg, 0.15 mmol) were added. The mixture was stirred at room temperature overnight, then diluted with water. The resulting precipitate was filtered and the residue was purified by column chromatography using silica gel 60-120 mesh and 90% ethyl acetate in hexane as eluant to afford 20 mg (30%) of N-biphenyl-4-yl-3-oxo-3-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-propionamide. LCMS: 496.18 (M+1)+, 97.3%. 1H NMR: (CDCl3): δ 9.6 (d, 1H), 7.76 (d, 1H), 7.6 (m, 7H), 7.44 (t, 2H), 7.35 (t, 2H), 4.0 (m, 2H), 3.7 (m, 4H), 3.5 (m, 4H), 3.25 (m, 2H).

Provenance & Evidence