Chlorosuccinimide → 3-amino-N-{4-[3-(4-chloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-5-yl]-2,6-dimethyl-phenyl}-4-cyano-benzamide

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Reaction Steps

4-Chloro-benzaldehyde oxime (6.64 g, 42.70 mmol) and N-chlorosuccinimide (“NCS”) (5.70 g, 42.70 mmol) were dissolved in N,N-dimethylformamide (40 ml). The reaction mixture was stirred at ambient temperature for 90 minutes. A solution of 3-amino-4-cyano-N-[2,6-dimethyl-4-(1-trifluoromethyl-vinyl)-phenyl]-benzamide (4.4 g, 12.20 mmol) (Example I5) and triethylamine (5.95 mL, 0.66 mmol) in N,N-dimethylformamide (40 ml) was added and the reaction mixture was stirred at ambient temperature for 18 hours. The reaction mixture was diluted with water (500 ml) and ethyl acetate (500 ml) and the phases were separated. The organic phase was washed twice with water and the aqueous phases were extracted once 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: cyclohexane/ethyl acetate 3:1) to give 3-amino-N-{4-[3-(4-chloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-5-yl]-2,6-dimethyl-phenyl}-4-cyano-benzamide (3.67 g, 59% yield). LC/MS (Method A): 513 (MH+); RT: 2.04. 1H-NMR (CDCl3, 400 MHz): 7.62 (m, 3H), 7.45 (d, 1H), 7.40 (m, 2H), 7.36 (s, 2H), 7.31 (s, 1H), 7.18 (d, 1H), 4.63 (s, 2H), 4.08 (d, 1H), 3.76 (d, 1H), 2.30 (s, 6H) ppm.

Provenance & Evidence