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Friedel-Crafts Reactions of Amino Compounds.New Method for the Preparation of l-Amino-4-hydroxyanthraquinone1Summary: Friedel-Crafts reaction of substituted amines has resulted in a new method for the preparation of l-amino-4-hydroxyanthraquinone.

F r i e d e l -C r a f t ' s a c y l a t i o n , a n t h r a q u i n o n e l-Amino-4-hydroxy-anthraquinone (3), commer cially known as Celliton fast pink B, an important dye for all classes of fibers, has earlier been prepared from anthraquinone derivatives1-4. We wish to re port its synthesis by condensing phthalic anhydride (1) with ^-chlorophenol and ^-aminophenol deri vatives separately using Copper complex o f 4-chloro-1-hydroxy-anthraquinone (5) 1.3 g of 4 were dissolved in 7.5 ml of acetone and mixed with copper ammonia solution (prepared by adding 5 g of copper sulphate in 12 ml of 25% am monia). The mixture after refluxing for two hours was distilled to remove acetone and kept at room