DE574163C - Process for the preparation of condensation products of the anthraquinone series - Google Patents

Description

Process for the preparation of condensation products of the anthraquinone series In the main patent 536449, K1. I2q, is a method for the preparation of condensation products the anthraquinone series described, which consists in the fact that one such I-amino-2-halogenanthraquinones, in which the hydrogen atoms of the amino group are replaced by the carbonyl groups of o-dicarboxylic acids are replaced, reacted with α-aminoanthraquinones.

It has now been found that I-amino-2-halogenanthraquinones, where the two hydrogen atoms of the amino group through the carbonyl groups are replaced by aliphatic dicarboxylic acids, with amines, in particular with aminoanthraquinones, have it implemented. This results in almost quantitative scavenging compounds, in which the halogen of the starting material replaced by the remainder of the amine used is replaced. This was not foreseen after the use of acyl compounds with monobasic aliphatic acids as a result of the simultaneous formation of oxazoles leads to unsatisfactory results. Derivatives and substitution products behave analogously of the starting materials mentioned.

The condensation products obtainable according to the invention can z. B. are used as starting materials for the representation of dyes.

Example I 19 parts of I-succinimino-2-bromoanthraquinone z. B. by heating I-amino-2-bromoanthraquinone with succinic anhydride under Addition of small amounts of iron chloride, with II parts of I-aminoanthraquinone, 5 Divide dehydrated sodium acetate and 0.2 parts copper acetate in I2o parts boiling nitrobenzene heated until practically no more I-aminoanthraquinone can be proven. It is allowed to cool, filtered off with suction and removed from the residue Solvent and the inorganic ingredients in the usual way. You get the reaction product in good yield in the form of dark red crystals, it is halogen-free, dissolves in concentrated sulfuric acid with a deep blue color and probably represents the I-succinimino-2 ₧ I'-dianthrimide.

Example 2 38 parts of I-succinimino-2-bromoanthraquinone are mixed with 25 Parts i-amino-3-cliloranthraquinone, i ?, parts sodium acetate and 0.5 share Copper acetate in 250 parts of boiling nitrobenzene is heated until the I-succinimino-2-bromoanthraquinone can no longer be proven. One then lets it cool down and sucks the separated off sparingly soluble crystals and works on in the usual way. The thus obtained Compound, probably the I-succinimino-3'-chloro-2 ₧ I'-dianthrimide, dissolves in concentrated sulfuric acid with a deep blue color.

Similarly, when using I-amino-3-methylanthraquinone, one obtains instead of I-amino-3-chloroanthraquinone, I-succinimino-3'-methyl-2 ₧ I'-dianthrimide.

Claims (1)

PATENT CLAIM: Further development of the process of the main patent 536449, K1. I2q, characterized in that such I-amino-2-halogenanthraquinones, in which the hydrogen atoms of the amino group are replaced by the carbonyl groups of aliphatic Dicarboxylic acids are replaced, reacted with Amineh.