反应详情

A solution of 156 g of methyl 3-cyano-2,4,5-trifluoro-benzoate in a mixture of 960 ml of glacial acetic acid, 140 ml of water and 69 ml of concentrated sulphuric acid is heated to reflux for 8 hours. The acetic acid is distilled off and the resulting residue is treaten with water. The precipitate is filtered off with suction, washed with water and dried.

1. temperatureis heated
2. temperatureto reflux for 8 hours
3. distillationThe acetic acid is distilled off
4. filtrationThe precipitate is filtered off with suction
5. washwashed with water
6. customdried