Nitrobenzene → 1-(4'-Methyl-3'-nitrophenylamino)-4-phenylmercaptoanthraquinone

Participants

Reaction Steps

A mixture of 23.2 parts of 1-amino-4-phenylmercaptoanthraquinone, 9 parts of sodium carbonate and 150 parts of nitrobenzene is heated to the boil, whilst stirring, and dehydrated in the course of one hour, whilst a stream of nitrogen is passed through. 30 parts of 4-bromo-2-nitrotoluene and 1 part of copper-I chloride are then added to the mixture, which has been cooled to 150°. After stirring for 15 hours at 150° and, at the same time, passing a moderate stream of nitrogen through the mixture, the reaction mixture is allowed to cool. The reaction product is precipitated by gradually adding 200 parts of methanol and is filtered off, washed with methanol and hot water and finally boiled thoroughly with 5% strength hydrochloric acid. This gives 29.5 parts (90% of theory) of 1-(4'-methyl-3'-nitrophenylamino)-4-phenylmercaptoanthraquinone with a melting point of 199°-201°. The colorant dyes polyester violet in bulk.

Provenance & Evidence