p-Chlorothiophenol → HCID 23316283, compound

Participants

Reaction Conditions

Reaction Steps

11.6 g of phenyl 1-amino-4-nitroanthraquinone-2-carboxylate (see Example 3a), 4.2 g of potassium carbonate (anhydrous) and 4.8 g of 4-chlorothiophenol are introduced into 50 cc of N-methylpyrrolidone, and the mixture is heated at 80° C. until the starting material has reacted completely. The mixture is then diluted at 70° C. with 50 cc of methanol and is allowed to cool. The crystals which have separated out are filtered off with suction, washed with methanol and hot water and dried. This gives 8.3 g, corresponding to 65% of theory, of methyl 1-amino-4-(4-chlorophenylmercapto)-anthraquinone-2-carboxylate, which has been formed by reacting the phenyl ester with the methanol used for the precipitation. The dyestuff can be purified by recrystallisation from dimethylformamide.

Provenance & Evidence