Sulfuric Acid → Anthraquinone

Participants

Reaction Steps

Twenty-five parts of 1,2,4-trihydroxy-anthraquinone was added to 45 parts of concentrated sulfuric acid. The obtained mixture was cooled with ice in a nitrogen atmosphere. Then, 15 parts of N-methylolacrylamide was added to the resulting mixture in portions. After the completion of the addition, the obtained mixture was stirred at room temperature for 24 hours and poured over a large amount of ice. The precipitate thus formed was recrystallized from ethanol to give a reddish-brown polymerizable anthraquinone dye F. The anthraquinone dye F is represented by the below chemical formula (VII). ##STR7##

Provenance & Evidence