反应 #2301546

反应方程式

methyl [3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-pyridyloxy]acetate

sodium carbonate

cyclopentanol

→

cyclopentyl [3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-pyridyloxy]acetate

溶剂

water

反应条件

后处理

1. 1
   workup.WAITat 120° C. for 2 hours
2. 2
   温度The reaction mixture was cooled to room temperature
3. 3
   萃取the mixture was extracted with ethyl acetate
4. 4
   洗涤The organic layer was washed with saturated aqueous sodium chloride solution
5. 5
   干燥dried over anhydrous magnesium sulfate
6. 6
   浓缩concentrated

实验过程

A mixture of 0.30 g of methyl [3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-pyridyloxy]acetate (compound a-6), 0.06 g of sodium carbonate, and 3.0 ml of cyclopentanol was stirred at 100° C. for 1.5 hours and then at 120° C. for 2 hours. The reaction mixture was cooled to room temperature and then poured into water, 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 0.15 g of cyclopentyl [3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-pyridyloxy]acetate (compound a-28).

来源