反应详情

A mixture of 15.16 g of methyl (2-hydroxyphenoxy)acetate, 29.23 g of 2,5-difluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyri midin-1-yl]nitrobenzene, 11.5 g of anhydrous potassium carbonate, and 160 ml of N,N-dimethylformamide was stirred at room temperature for 30 minutes and then at 70° C. for 3 hours. Another 5 g of methyl (2-hydroxyphenoxy)acetate was added, and the mixture was stirred for 1 hour. The reaction mixture was poured into 2% aqueous hydrochloric acid solution, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and then concentrated. The residue was subjected to silica gel column chromatography to give 17.8 g of methyl [2-{4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyri midin-1-yl]-2-nitrophenoxy}phenoxy]acetate.

1. waitat 70° C. for 3 hours
2. stirringthe mixture was stirred for 1 hour
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic layer was washed with saturated aqueous sodium chloride solution
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated