反应详情

温度

90 °C

To 18 ml of chloroform solution of ethyl 3-ethoxy-2-(3-chloro-2,4,5-trifluorobenzoyl)acrylate prepared from 2.52 g of ethyl 3-chloro-2,4,5-trifluorobenzoylacetate by normal process was added 2.65 g of 2-amino-3,5-difluoro-6-(p-methoxybenzylamino)pyridine. The solution was concentrated under reduced pressure, and to the residue were added 2.5 g of anhydrous potassium carbonate and 6 ml of N,N-dimethylformamide, and the mixture was stirred at 90° C. for 15 minutes and allowed to cool. The solution was separated by adding 50 ml of chloroform and 500 ml of distilled water, and the chloroform layer was washed twice with 500 ml of distilled water, dried over anhydrous magnesium sulfate, concentrated under reduced pressure, and allowed to stand. The precipitate was dispersed in ethanol, collected by filtration, and washed with ethanol to obtain 3.20 g of the title compound as a yellow powder.

1. concentrationThe solution was concentrated under reduced pressure
2. additionto the residue were added 2.5 g of anhydrous potassium carbonate and 6 ml of N,N-dimethylformamide
3. temperatureto cool
4. customThe solution was separated
5. additionby adding 50 ml of chloroform and 500 ml of distilled water
6. washthe chloroform layer was washed twice with 500 ml of distilled water
7. dry with materialdried over anhydrous magnesium sulfate
8. concentrationconcentrated under reduced pressure
9. additionThe precipitate was dispersed in ethanol
10. filtrationcollected by filtration
11. washwashed with ethanol