反应详情

温度

35 °C

To a mixture of 0.21 g of an iron powder, 3 ml of acetic acid and 0.3 ml of water was added a solution of 3-{4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]-2-nitrophenoxy}-2-{1-(methoxycarbonyl)ethoxy}pyridine [present compound 9-42] in 1.2 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, 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 chromatography to obtain 0.16 g of 3-{2-amino-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-{1-(methoxycarbonyl)ethoxy}pyridine (as a mixture of two diastereomerical isomers).

1. additionAfter completion of the addition
2. filtrationthe reaction solution was filtrated through Celite
3. additiondiluted with ethyl acetate
4. washthe organic layer was washed with saturated saline
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated