Sodium Chloride → 5-[3-(4-Fluoro-phenyl)-5-methyl-isoxazol-4-ylmethoxy]-2-methyl-2H-pyrazole-3-carboxylic acid pyrrolidin-1-ylamide

Participants

Reaction Steps

To a solution of 5-[3-(4-fluoro-phenyl)-5-methyl-isoxazol-4-ylmethoxy]-2-methyl-2H-pyrazole-3-carboxylic acid (200 mg, 0.6 mmol) in DMF (5 mL) were added 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate (291 mg, 0.91 mmol), N,N-diisopropyl ethyl amine (510 μL, 3.0 mmol) and N-aminopyrrolidine HCl (111 mg, 0.91 mmol). The resulting reaction mixture was stirred overnight at room temperature. The reaction mixture was then poured into aqueous sodium chloride (saturated) and the mixture was extracted with ethyl acetate. The combined organic layers were then washed with water, citric acid solution and saturated sodium hydrogen carbonate solution and then dried over sodium sulfate, filtered and evaporated. Concentration and purification by chromatography (silica, dichloromethane) afforded the title compound (139 mg, 58%) as a colorless oil. MS: m/e=400.2 [M+H]+.

Provenance & Evidence