Triethylamine → 4-[5-(3,5-Dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl]-2-methoxyphen yl trifluoromethane sulfonate

Participants

Reaction Conditions

Reaction Steps

In a solution of 2.0 g of 4-hydroxyiminomethyl-2-methoxyphenyl trifluoromethane sulfonate in 30 ml of N,N-dimethylformamide, 0.9 g of N-chlorosuccinic acid imide was added, and stirred at 40 to 50° C. for 30 minutes. Then, the reaction mixture was left and cooled to room temperature, 1.5 g of 3,5-dichloro-1-(1-trifluoromethylethenyl)benzene synthesized in Step 1 of Synthetic Example 3 and 0.7 g of triethylamine were added, and stirred at room temperature for 90 minutes. After the completion of the reaction, the reaction mixture was poured in 100 ml of ice water, extracted with ethyl acetate (50 ml×2), the organic phase was dehydrated with saturated sodium chloride aqueous solution and dried over anhydrous magnesium sulfate, and then the solvent was distilled off under reduced pressure. The residue was purified with silica gel column chromatography that was eluated with ethyl acetate-hexane (1:7), and 1.4 g of the aimed product was obtained as colorless resinous substance.

Provenance & Evidence