反应详情

A mixture containing 6.30 g of N-1-butanesulfonyl-3-acetylamino-4-nitrobenzamide, a 10% sodium hydroxide aqueous solution, 300 ml of ethanol and 200 ml of water was stirred at room temperature for 4 hours and then at 50° C. for 3 hours. The solvent was distilled off to approximately a half volume, and the residue was adjusted to a pH of 2 with 10% hydrochloric acid. The crystals precipitated were collected, and were dried under reduced pressure to give 5.22 g of N-1-butanesulfonyl-3-amino-4-nitrobenzamide.

1. distillationThe solvent was distilled off to approximately a half volume
2. customThe crystals precipitated
3. customwere collected
4. customwere dried under reduced pressure