Water → 3-{2-Amino-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-(ethoxycarbonyl)methoxypyridine

Participants

Reaction Conditions

Reaction Steps

To a mixture of 17 g of an iron powder, 30 ml of acetic acid and 3 ml of water was added a solution of 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] in 20 ml of acetic acid dropwise while maintaining the temperature of the reaction solution at 35° C. or lower. After completion of the addition, the mixture was stirred for 1 hour at room temperature, for 3 hours at 40° C., then, the reaction solution was filtrated through Celite, and diluted with ethyl acetate. The mixture was neutralized with saturated aqueous sodium bicarbonate solution, the organic layer was washed with saturated saline, dried over anhydrous magnesium sulfate, and concentrated. Then, the resulted residue was subjected to silica gel column chromatography to obtain 15.46 g of 3-{2-amino-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-(ethoxycarbonyl)methoxypyridine.

Provenance & Evidence