1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 1-phenyl-1H-imidazole-4-carboxylic acid {2-[4-(4-fluoro-3-trifluoromethyl-phenoxy)-piperidin-1-yl]-2-oxo-ethyl}-amide

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Reaction Steps

DIPEA (97 mg, 0.75 mmol) was added to a stirred solution of [(1-phenyl-1H-imidazole-4-carbonyl)-amino]-acetic acid (prepared from Intermediate 68 by means of Step 3 of the General Scheme) (61 mg, 0.25 mmol) in DMF (2 mL) followed by HOBt (35 mg, 0.26 mmol) and EDCI (50 mg, 0.26 mmol). After 2 minutes of stirring, 4-(4-fluoro-3-trifluoromethyl-phenoxy)-piperidine hydrochloride (prepared by the method used for the synthesis of Intermediate 15) (75 mg, 0.25 mmol) was added and the resulting mixture was stirred at ambient temperature overnight. The reaction mixture was diluted with cold water and extracted with ethyl acetate. The organic layer was dried over sodium sulfate, concentrated under reduced pressure. The residue obtained was purified by column chromatography (using silica gel 60-120 and 40% EtOAc in hexane as eluent) to afford 59.3 mg (49% Yield) of 1-phenyl-1H-imidazole-4-carboxylic acid {2-[4-(4-fluoro-3-trifluoromethyl-phenoxy)-piperidin-1-yl]-2-oxo-ethyl}-amide. LC/MS [M+H]+: 491, 96%. 1H NMR (300 MHz, DMSO-d6): δ 8.4 (m, 1H), 8.3 (m, 1H), 8.05 (m, 1H), 7.75 (m, 2H), 7.55 (m, 2H), 7.4 (m, 4H), 4.8 (m, 1H), 4.2 (m, 2H), 3.9 (m, 1H), 3.6 (m, 1H), 3.4 (b, 1H), 3.3 (m, 1H), 2.0 (m, 2H), 1.6 (m, 2H).

Provenance & Evidence