反应详情

and phthalic anhydride 3.0 g. were heated as described in Example 11. Another 3.0 g. of the amino-phenol and 85% phosphoric acid 8 ml. were added and the contents heated under reflux in an oil-bath at 170° for three hours. A solution of 50% aqueous perchloric acid 8 ml. in methanol 80 ml. was added to the cooled reaction, the mixture refluxed and cooled at 0° overnight. Filtration gave 5.0 g. (44%) of dark red crystals.

1. temperaturewere heated
2. additionwere added
3. temperaturethe contents heated
4. temperatureunder reflux in an oil-bath at 170° for three hours
5. additionwas added to the cooled reaction
6. temperaturethe mixture refluxed
7. temperaturecooled at 0° overnight
8. filtrationFiltration
9. customgave 5.0 g