Triethylamine → 4-Chloro-1,3-dimethylpyrazole-5-carboxamide

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Reaction Steps

To a stirred mixture of 4-[4-(1,1,2,2-tetrafluoroethoxy)phenoxy]benzylamine (359 mg, 1.14 mM), triethylamine (136 mg, 1.35 mM) and toluene (20 ml) was added dropwise a solution (10 ml) of 4-chloro-1,3-dimethylpyrazole-5-carbonyl chloride (200 mg, 1.04 mM) in toluene at 0°-10° C., and the mixture was stirred for 3 h at room temperature. The mixture was poured into ice water, and the mixture was extracted with toluene. The extract was washed with saturated sodium hydrogen carbonate solution, saturated ammonium chloride solution and brine, dried with magnesium sulfate, and concentrated in vacuo. The residue was chromatographed over silica gel to give N-{4-[1,1,2,2,-tetrafluoroethoxy)phenoxy]-benzyl}-4-chloro-1,3-dimethylpyrazole-5-carboxamide (420 mg, 86%) as colorless crystals, m.p. 101.3° C.

Provenance & Evidence