Water → N-[[1-(5-bromo-3-chloro-2-pyridyl)cyclopropyl]methyl]-3-(trifluoromethyl)pyridine-2-carboxamide

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Reaction Steps

350 mg of C-[1-(5-bromo-3-chloro-pyridin-2-yl)-cyclopropyl]-methylamine (step 3 of PREPARATION EXAMPLE 3) was dissolved in 7 ml of dichloromethane and 0.37 ml of triethylamine was added at ambient temperature. Then a solution of 308 mg 3-(trifluoromethyl)pyridine-2-carbonyl chloride (1.10 eq, 1.47 mmol, 0.) in 3 ml of dichloromethane was added dropwise. The reaction mixture was stirred at ambient temperature for 14 hours, then water was added, the phases were separated and the water phase was extracted with dichloromethane. The organic phase was dried with anhydrous sodium sulfate, filtered and concentrated. Crude material was obtained as a brown sticky solid, which was purified by flash chromatography on silica gel with cyclohexane/ethyl acetate (2:1) as a solvent. Thus, 560 mg of N-[[1-(5-bromo-3-chloro-2-pyridyl)cyclopropyl]methyl]-3-(trifluoromethyl)pyridine-2-carboxamide was obtained as a sticky solid. 1H-NMR (CDCl3): 8.70 ppm (d, 1H), 8.45 ppm (d, 1H), 8.12 ppm (d, 1H), 7.90 ppm (s, 1H, broad), 7.83 ppm (d, 1H), 7.52 ppm (m, 1H), 3.73 ppm (d, 2H), 1.10 ppm (m, 4H).

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