反应详情

温度

45 °C

26.6 g (0.2 mol) of 2-indolinone and 53.8 g (0.44 mol) of 4-dimethylamino-pyridine are dissolved in 400 ml of DMF and after the addition of 30.9 g (0.22 mol) of benzoylchloride in 100 ml of DMF stirred for 45 minutes at 45° C. The solution is poured onto 3 l of water and 100 ml of conc. hydrochloric acid, the precipitate formed is suction filtered, recrystallised from glacial acetic acid and dried.

1. customthe precipitate formed
2. filtrationfiltered
3. customrecrystallised from glacial acetic acid
4. customdried