Process for the manufacture of aminohydroxyanthraquinones

Details Process for the manufacture of aminohydroxyanthraquinones Process for the manufacture of aminohydroxyanthraquinones

1979-08-21

1981-02-10

Douglas, Winston A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260380, C07C10375, C07C 9724

Patent

active

042501024

ABSTRACT:
The invention relates to a process for the manufacture of an aminohydroxyanthraquinone of the formula ##STR1## wherein both of X are hydrogen or one X is --NH.sub.2 and the other is --OH and Z is hydrogen, C.sub.1 -C.sub.4 alkyl or carboxyl, with the proviso that, if Z is C.sub.1 -C.sub.4 alkyl or carboxyl, both of X must be hydrogen, which process comprises reacting a nitroanthraquinone of the formula ##STR2## wherein both of Y are hydrogen or one Y is --NO.sub.2 and the other is hydrogen and Z is as defined for formula (1), with the proviso that, if Z is C.sub.1 -C.sub.4 alkyl or carboxyl, both of Y must be hydrogen, in an aprotic dipolar solvent, with an alkali metal azide or alkaline earth metal azide, in the temperature range between 0.degree. and 30.degree. C. The reaction products are disperse dyes or intermediates for obtaining vat dyes and disperse dyes.

REFERENCES:
patent: 2982773 (1961-05-01), Grossmann

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