反应详情

温度

60 °C

A mixture of 1.45 g of the product of Example 11, 4 ml of 2 N sodium hydroxide solution and 21 ml of methanol was refluxed and the methanol was evaporated. 25 ml of water were added to the mixture and the solution was filtered through asbestos. The solution was heated to 60° C. and was acidified with concentrated hydrochloric acid. The resulting suspension was cooled and filtered and the recovered precipitate was washed with water and dried to obtain 1.26 g of 2-(8-trifluoromethyl-4-quinolinylamino)-5-fluoro-benzoic acid melting at 265°±3° C.

1. temperaturewas refluxed
2. customthe methanol was evaporated
3. addition25 ml of water were added to the mixture
4. filtrationthe solution was filtered through asbestos
5. temperatureThe resulting suspension was cooled
6. filtrationfiltered
7. washthe recovered precipitate was washed with water
8. customdried