反应详情

Hydrochloric acid (200 ml) was added to 6-nitro-8-acetoxy-3,4-dihydrocarbostyril (20 g) and the mixture was refluxed for 4 hours. After ice cooling, crystals which precipitated were collected by filtration and recrystallized from methanol to give 13.76 g of 6-nitro-8-hydroxy-3,4-dihydrocarbostyril.

1. temperaturethe mixture was refluxed for 4 hours
2. customAfter ice cooling, crystals which precipitated
3. filtrationwere collected by filtration
4. customrecrystallized from methanol