Process for the manufacture of anthraquinone compounds

Details Process for the manufacture of anthraquinone compounds Process for the manufacture of anthraquinone compounds

1975-12-10

1977-03-29

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260380, 2603455, 2603406, 2603462R, C09B 152

Patent

active

040149064

ABSTRACT:
A process for the manufacture of anthraquinone compounds of formula ##STR1## wherein X represents a hydrogen atom or a substituted or unsubstituted lower alkyl radical of 1 to 6 carbon atoms or a substituted or unsubstituted aryl radical, and the ring A can be further substituted, by sulphonating 1,5-dialkoxy-, 1,5-dicycloalkoxy- or diaryloxy-anthraquinone in the 2 and 6 positions, introducing two amino groups in positions 4 and 8 by treating the sulphonated intermediate with hydroxylamine or a salt thereof in sulphuric acid medium, in the presence of a metal catalyst, introducing the radical ##STR2## by reacting the boric acid complex of 1,5-dihydroxy-4,8-diaminoanthraquinone-2,6-disulphonic acid with a compound of formula ##STR3## saponifying the boric acid groups and splitting off a SO.sub.3 H group, which process comprises using 1,5-dialkoxy-, 1,5-dicycloalkoxy- or 1,5-diaryloxyanthraquinone as starting compounds and reacting them to give the end product of formula I.

REFERENCES:
patent: 1840644 (1932-01-01), Stowell
patent: 3505362 (1970-04-01), Hederich et al.
patent: 3681402 (1972-08-01), Genta
patent: 3763193 (1973-10-01), Volker et al.
patent: 3936477 (1976-02-01), Maier et al.

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