Hydrochloric Acid → 3-{4-Fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]-2-nitrophenoxy}-2-(ethoxycarbonyl)methoxypyridine

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Reaction Conditions

Reaction Steps

To a mixture of 10.45 g of 3-hydroxy-2-(ethoxycarbonyl)methoxypyridine, 16.92 g of 2,5-difluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]nitrobenzene and 100 ml of N,N-dimethylformamide was added 7.32 g of potassium carbonate, and the mixture was stirred for 2 hours at 70° C. The solution was cooled to room temperature, poured into a mixture of ice water, sodium chloride and hydrochloric acid, and extracted with ethyl acetate. The organic layer was washed with saturated saline, dried over anhydrous magnesium sulfate, and concentrated. The residue was subjected to silica gel column chromatography to obtain 17.28 g of 3-{4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]-2-nitrophenoxy}-2-(ethoxycarbonyl)methoxypyridine [present compound 9-46].

Provenance & Evidence