Water → 4,5-Difluoro-2-[[3-methyl-1-(2-pyridinyl)-1H-pyrazol-5-yl]amino]benzoic acid

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Reaction Steps

Under an argon atmosphere, a solution of 3-methyl-1-(2-pyridinyl)-1H-pyrazol-5-ylamine (6.01 g, 34.5 mmol), 2-chloro-4,5-difluorobenzoic acid (6.64 g, 34.5 mmol), copper acetate (II) (0.718 g, 3.95 mmol) and potassium carbonate (4.77 g, 34.5 mmol) in N,N-dimethylformamide (30 mL) was heated under reflux for 2 hours. The solution was cooled to room temperature, and poured into water. The solution was made weakly acidic by the addition of acetic acid, and the resulting crude crystals were collected by filtration. The crystals were washed with water and air dried to give the title compound (9.21 g, 81% yield).

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