Pyridine → 3-amino-4-bromo-N-[2,6-dimethyl-4-(1,2,2,2-tetrafluoro-1-trifluoromethyl-ethyl)-phenyl]-benzamide

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Reaction Steps

To a solution of 2,6-dimethyl-4-(1,2,2,2-tetrafluoro-1-trifluoromethyl-ethyl)-phenylamine (0.31 g, 1.1 mmol) (prepared according to EP 1,006,102) in anhydrous tetrahydrofuran (2 ml), at 20° C., was added sequentially pyridine (0.174 g, 2.2 mmol) and a solution of 3-sulfinylamino-benzoyl chloride (0.25 g, 0.86 mmol) (Example 1.2) in anhydrous tetrahydrofuran (2 ml). The reaction mixture was stirred at ambient temperature for three hours. The reaction mixture was quenched by addition of water (5 ml). After separation of the phases, the aqueous layer was extracted with ethyl acetate. The combined organic phases were dried over sodium sulfate and concentrated. The residue was purified by column chromatography on silica gel (eluent: ethyl acetate/cyclohexane 1:3) to give 3-amino-4-bromo-N-[2,6-dimethyl-4-(1,2,2,2-tetrafluoro-1-trifluoromethyl-ethyl)-phenyl]-benzamide (0.235 g, 78% yield). 1H-NMR (DMSO-d6, 400 MHz): 7.53 (d, 1H), 7.44 (s, 2H), 7.38 (d, 1H), 7.10 (q, 1H), 5.6 (s, 2H), 2.24 (s, 6H) ppm.

Provenance & Evidence