Bromine → HCID 20393726, compound

Participants

Reaction Steps

50 g of 1-isopropylamino-8-methoxy-anthraquinone are dissolved in 500 ml of 30% strength hydrochloric acid; 33 g of bromine are added dropwise to the clear solution over the course of 15 minutes at 10°-15° and the mixture is stirred for a further 18 hours at room temperature. It is stirred into 5,000 ml of ice-cold water, excess bromine is removed by means of the amount of bisulphite just required, and the product is filtered off, washed until neutral and dried in vacuo. Yield: 62 g. Bromine content: 21.1%.

Provenance & Evidence