Triethylamine → Enzalutamide carboxylic acid

Participants

Reaction Steps

4-(1-Carboxy-1-methyl-ethylamino)-2-fluoro-benzoic acid (241 mg, 1 mmol), 4-isothiocyanato-2-trifluoromethylbenzonitrile (342 mg, 1.5 mmol) and triethylamine (343 mg, 3.4 mmol) were mixed in EtOH (5 mL) and the solution was stirred for 10 days at room temperature. The reaction mixture was concentrated under reduced pressure, the residue was acidified with 1M aqueous HCl, and the product was extracted with ethyl acetate. The combined organic layer was dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The crude product obtained was purified by column chromatography eluting with ethyl acetate to obtain 4-[3-(4-cyano-3-trifluoromethyl-phenyl)-5,5-dimethyl-4-oxo-2-thioxo-imidazolidin-1-yl]-2-fluoro-benzoic acid (10 mg) as an off white solid.

Provenance & Evidence