反应详情

温度

0 °C

To ethyl 3-amino-4,4,4-trifluorocrotonate are added N,N-dimethylformamide and sodium hydride and the mixture is stirred at 0° C. Thereafter, to the reaction solution is added a mixture of 4-chloro-2-fluoro-5-{2-(ethoxycarbonylmethoxy)phenoxy}phenyl isocyanate [Intermediate compound A12-23] and N,N-dimethylformamide, and the mixture is stirred at room temperature. The reaction solution is poured into a mixture of hydrochloric acid and ice water, and the deposited crystal is collected by filtration to obtain ethyl [2-{2-chloro-5-[2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]-4-fluorophenoxy}phenoxy]acetate.

1. additionThereafter, to the reaction solution is added
2. stirringthe mixture is stirred at room temperature
3. filtrationthe deposited crystal is collected by filtration