反应详情

To a mixture of 0.3 g of iron powder, 3 ml of acetic acid, and 0.3 ml of water was added dropwise a solution of 0.30 g of 3-{4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrim idin-1-yl]-2-nitrophenoxy}-2-(methoxycarbonyl)methoxypyridine in 2 ml of acetic acid, while the temperature of the reaction mixture was kept at 35° C. or lower. After completion of the dropwise addition, the mixture was stirred for 2 hours and then filtered through Celite. The filtrate was diluted with ethyl acetate, and the mixture was neutralized with saturated aqueous sodium bicarbonate solution. 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 0.24 g of 3-{2-amino-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-(methoxycarbonyl)methoxypyridine.

1. customwas kept at 35° C.
2. additionAfter completion of the dropwise addition
3. filtrationfiltered through Celite
4. additionThe filtrate was diluted with ethyl acetate
5. washThe organic layer was washed with saturated aqueous sodium chloride solution
6. dry with materialdried over anhydrous magnesium sulfate
7. concentrationconcentrated