Sodium Hydroxide → 5-Amino-1-(4-methoxyphenyl)-3-(4-tolyl)pyrazole-4-carboxamide

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Reaction Steps

The title compound was prepared from 2-cyano-3-methylthio-3-(4-tolyl) acrylamide (232 mg, 1.0 mmol), 4-methoxyphenylhydrazine hydrochloride (192 mg, 1.1 mmol) and sodium hydroxide (44 mg, 1.1 mmol) following the procedure used for the compound of Example 12. The crude product was purified by chromatography (SiO2, 75% ethyl acetate in hexane) and recrystallisation from ethyl acetate-hexane to give the title compound as white crystals (101 mg) m.p. 174-175°. δH (d6DMSO) 7.49-7.43 (4H, m), 7.28 (2H, d, J 7.8 Hz), 7.07 (2H, d, J 8.9 Hz), 6.32 (2H, br s), 3.81 (3H, s) and 2.29 (3H, s), one set of amino protons not observed. MS (ES+) 323 (MH+, 100%).

Provenance & Evidence