Ethanamine, 2,2,2-trifluoro- → 6-{[3-(3-Fluoro-phenyl)-5-methyl-isoxazol-4-ylmethyl]-amino}-N-(2,2,2-trifluoro-ethyl)-nicotinamide

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Reaction Steps

A solution of trimethylaluminium (2 M in toluene, 500 μL, 1.0 mmol) was added dropwise (exothermic) to a solution of 2,2,2-trifluoroethylamine (99 mg, 79 μL, 1.0 mmol) in dioxane (4 mL) and the resulting mixture was stirred at room temperature for 1 h. Then a solution of 6-{[3-(3-fluoro-phenyl)-5-methyl-isoxazol-4-ylmethyl]-amino}-nicotinic acid methyl ester (85 mg, 0.25 mmol) in dioxane (3 mL) was added. The resulting mixture was then heated at 85-95° C. for 2 h and then cooled to room temperature and then poured into a sodium potassium tartrate solution and extracted with ethyl acetate which was then washed with brine, dried over sodium sulfate and evaporated. Purification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 0:100) afforded the title compound (88 mg, 86%) which was obtained as a white solid. MS: m/e=409.1 [M+H]+.

Provenance & Evidence