反应详情

At 130° C., 82.5 g of 6-fluoro-2-indolinone (starting material IV) are stirred in 180 ml acetic anhydride for 3 hours. After cooling to room temperature, the precipitate is filtered off with suction, washed with 100 ml of petroleum ether and dried.

1. filtrationthe precipitate is filtered off with suction
2. washwashed with 100 ml of petroleum ether
3. customdried