Triethylamine → 1-{4-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-naphthalen-1-yl}-1H-[1,2,4]triazole

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Reaction Steps

N-chlorosuccinimid (220 mg) is added to a solution of 4-[1,2,4]triazol-1-yl-naphthalene-1-carbaldehyde oxime (390 mg) in DMF (5 ml). After 45 minutes at 40° C., the reaction is cold down to 0° C., and 1,3-dichloro-5-(1-trifluoromethyl-vinyl)-benzene (394 mg, Example 1, step A) and triethylamine (0.25 ml) are added. The reaction is then further reacted at room temperature for 3 hours. Water is added (50 ml) and the reaction mixture is extracted two times with ethyl acetate. The organic phase is extracted, with a saturated aqueous solution of NaCl, dried over Na2SO4 and concentrated in vacuo. The crude product is purified on a semi-preparative HPLC: to yield 1-{4-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-naphthalen-1-yl}-1H-[1,2,4]triazole (500 mg) as beige crystals. MS (HPLC/MS): 477 (MH+). Retention time: 5.20 min.

Provenance & Evidence