反应详情

5-Cyano-N-(4-chlorophenyl)-2-methoxybenzamide (9.8 g) obtained in step D was dissolved in 80 mL of dimethyl sulfoxide, and the solution was cooled in a water bath. A solution prepared from 17.4 mL of a 30% aqueous solution of hydrogen peroxide and 9.5 g of potassium carbonate was added dropwise to the solution. After stirring for 1 hour, the mixture was poured into 800 mL of cold water. The precipitate formed was separated by filtration, washed with cold water, and then dried over diphosphorus pentoxide under reduced pressure to obtain 10.3 g (99%) of 3-N-(4-chlorophenyl)-4-methoxyisophthalamide.

1. temperaturethe solution was cooled in a water bath
2. additionwas added dropwise to the solution
3. customThe precipitate formed
4. customwas separated by filtration
5. washwashed with cold water
6. dry with materialdried over diphosphorus pentoxide under reduced pressure