反应详情

温度

40 °C

In a solution of 2.70 g of 4-(hydroxyiminomethyl) benzoic acid methyl ester in 15 ml of N,N-dimethylformamide, 2.04 g of N-chlorosuccinic acid imide was added, and stirred at 40° C. for 40 minutes. Then, the reaction mixture was cooled to 0° C., 3.40 g of 3,5-dichloro-1-(1-trifluoromethylethenyl)benzene and 1.72 g of triethylamine were added, continued to stir at room temperature for 18 hours. After the completion of the reaction, the reaction mixture was poured into 100 ml of ice water, extracted with ethyl acetate (50 ml×2), the organic phase was washed with water, dehydrated with saturated sodium chloride aqueous solution and dried over anhydrous sodium sulfate, and then the solvent was distilled off under reduced pressure. The residual solid was subjected to purification with medium-pressure preparative liquid chromatography (Yamazen Corporation, medium pressure preparative system; YFLC-Wprep) that was eluted with ethyl acetate-hexane (1:1 to 1:3 gradient), and 4.05 g of the aimed product was obtained as white crystal. Melting point 94.0 to 96.0° C.

1. temperatureThen, the reaction mixture was cooled to 0° C.
2. stirringto stir at room temperature for 18 hours
3. customAfter the completion of the reaction
4. extractionextracted with ethyl acetate (50 ml×2)
5. washthe organic phase was washed with water
6. dry with materialdried over anhydrous sodium sulfate
7. distillationthe solvent was distilled off under reduced pressure
8. customThe residual solid was subjected to purification with medium-pressure preparative liquid chromatography (Yamazen Corporation, medium pressure preparative system; YFLC-Wprep) that
9. washwas eluted with ethyl acetate-hexane (1:1 to 1:3 gradient)