Preparation of chloroanthraquinones from nitroanthraquinones

Details Preparation of chloroanthraquinones from nitroanthraquinones Preparation of chloroanthraquinones from nitroanthraquinones

1976-04-26

1977-10-18

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260378, 260379, 260380, 260381, 260383, C09B 100, C09B 110

Patent

active

040545873

ABSTRACT:
The nitro group of an .alpha.-nitroanthraquinone is replaced by chlorine by reaction with an ionic chloride in a solvent in the presence of an acid or of a compound which eliminates an acid. The ionic chloride may be an alkali metal, alkaline earth metal, ammonium or quaternary ammonium chloride. A molten tertiary amine hydrochloride can function as the ionic chloride, the acid and the solvent. The process permits one or more nitro groups of a poly-.alpha.-nitroanthraquinone to be selectively replaced.

REFERENCES:
lubs, "The Chemistry of Synthetic Dyes and Pigments", Hafner Publishing Co., N.Y. (1955), p. 345.

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