Sulfur → 1-Aminoanthraquinone

Participants

Reaction Conditions

Reaction Steps

A mixture of 5.0 parts of 5-nitro-1,4,4a,9a-tetrahydroanthraquinone with 100 parts of water, 2 parts of sulfur and 2 parts of calcium hydroxide was stirred at 95°C for 3 hours and then cooled to 25°C. Crystals precipitated were recovered by filteration, washed with water, then washed with a dilute hydrochloric acid to dissolving away calcium hydroxide and dried under reduced pressure to obtain 3.7 parts of crystalline 1-aminoanthraquinone.

Provenance & Evidence