反应详情

In a solution of 0.13 g of 2-amino-6-bromopyridine and 0.16 g of pyridine in 5 mL of dichloromethane, a solution of 0.30 g of 4-[5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl]-2-methylbenzoyl-chloride synthesized in Step 4 of Synthetic Example 1 in 5 mL of dichloromethane was added at room temperature with stirring. After the completion of the addition dropwise, it was stirred at the same temperature further for 2 hours. After the completion of the reaction, the solvent was distilled off under reduced pressure, the residue was dissolved in 50 mL of ethyl acetate, and precipitated insoluble material was removed through silica gel column, and the solvent was distilled off under reduced pressure. The residue was purified with silica gel column chromatography that was eluated with ethyl acetate-hexane (1:2) to obtain 0.25 g of the aimed product as colorless resinous substance.

1. additionAfter the completion of the addition dropwise
2. stirringit was stirred at the same temperature further for 2 hours
3. customAfter the completion of the reaction
4. distillationthe solvent was distilled off under reduced pressure
5. dissolutionthe residue was dissolved in 50 mL of ethyl acetate
6. customprecipitated insoluble material
7. customwas removed through silica gel column
8. distillationthe solvent was distilled off under reduced pressure
9. customThe residue was purified with silica gel column chromatography that