反应详情

82.5 g of 6-fluoro-2-indolinone are stirred in 180 ml acetic anhydride for 3 hours at 130° C. After cooling to ambient temperature the precipitate is suction filtered, washed with 100 ml petroleum ether and dried.

1. filtrationfiltered
2. washwashed with 100 ml petroleum ether
3. customdried