Sulfuric Acid → HCID 20474966, compound

Participants

Reaction Steps

A mixture of 300 parts of 28% strength oleum and 30 parts of 1,5-dinitroanthraquinone are stirred for 3 hours at 50° to 60° C. After the addition of 85.5 parts of 78% strength sulphuric acid and 165 parts of water with cooling the reaction mixture is stirred for 6 hours at room temperature and then left to stand overnight. The mixture is added to 1,000 parts of water, and the product is filtered off with suction and washed with water until neutral. After drying, 23.3 parts of crude 1-hydroxy-4-amino-8-nitroanthraquinone are obtained, which can be purified by recrystallisation from dimethylformamide.

Provenance & Evidence