Hydrochloric Acid → 4-(2-Methyl-5-nitroanilino)-2-(4-pyridinyl)-6-(trifluoromethyl)pyrimidine

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Reaction Steps

A mixture of 4-chloro-2-(4-pyridinyl)-6-(trifluoromethyl)pyrimidine (1 g, 3.90 mmol), 2-methyl-5-nitroaniline (890 mg, 5.90 mmol), and 2N HCl (3 ml) in water:ethanol (1:1, 200 ml) was refluxed for 48 h. The mixture was cooled to room temperature and basified with aqueous 2N NaOH to pH 10–12. The mixture was extracted with ethyl acetate (200 ml), washed with water (2×100 ml), with aqueous saturated NaCl (1×100 ml) and dried over anhydrous sodium sulfate. The ethyl acetate solution was rotary evaporated to dryness to give a tan solid (377 mg, 30%). 1H NMR (CDCl3): 8.90 (s, 1H), 8.80 (dd, J=1.8, 4.8 Hz, 2H), 8.30 (dd, J=1.5, 4.5 Hz, 2H), 8.09 (dd, J 2.4, 8.1 Hz, 1H), 7.51 (d, J=8.4 Hz, 1H), 6.99 (s, 1H), 6.87 (s, 1H), 2.47 (s, 3H).

Provenance & Evidence