Water → N-{1-[1-(3-chloro-5-trifluoromethyl-pyridin-2-yl)-cyclopropyl]-ethyl}-2,6-difluoro-benzamide

Participants

Reaction Conditions

Reaction Steps

100 mg of 1-[1-(3-Chloro-5-trifluoromethyl-pyridin-2-yl)-cyclopropyl]-ethylamine (step 4) was dissolved in 4 ml of dichloromethane and cooled to 0° C. Then 76 mg of triethylamine was added, followed by dropwise addition of a solution of 67 mg of 2,6-difluorobenzoyl chloride in 1 ml of dichloromethane. The reaction mixture was stirred at ambient temperature for 2 hours. Then 20 ml of water were added and the mixture was extracted with 20 ml dichloromethane. The organic phase was dried over sodium sulfate, filtered and concentrated. Thus, 162 mg of crude material was obtained as a pale yellow oil. This residue was purified by chromatography on silica gel, with cyclohexane/ethyl acetate (85:15) as a eluent. Thus, 149 mg of N-{1-[1-(3-chloro-5-trifluoromethyl-pyridin-2-yl)-cyclopropyl]-ethyl}-2,6-difluoro-benzamide was obtained as a colourless sticky oil. 1H-NMR (CDCl3): 8.67 ppm (s, 1H), 7.93 ppm (s, 1H), 7.33 ppm (m, 1H), 6.93 ppm (t, 2H), 6.69 ppm (d, 1H, broad), 4.37 ppm (m, 1H), 1.25 ppm (d, 3H), 1.20 ppm (m, 4H).

Provenance & Evidence