Process for producing anthraquinone compounds

Details Process for producing anthraquinone compounds Process for producing anthraquinone compounds

1980-10-16

1981-11-10

Douglas, Winston A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 9712

Patent

active

042997712

ABSTRACT:
In a process for producing an anthraquinone dye intermediate, 1,4-diamino-2,3-dicyanoanthraquinone, by reacting 1,4-diaminoanthraquinone-2-sulfonic acid, a salt thereof, 1,4-diaminoanthraquinone-2-cyanoanthraquinone, 1,4-diamino-2,3-disulfonic acid, or a salt thereof with a cyanogenating agent in an aqueous medium, the yield and quality of the product can be improved markedly by carrying out the reaction in the presence of a quaternary ammonium compound, and further, depending upon the starting material used, in the presence or absence of a dehydrogenating agent.

REFERENCES:
patent: 3203751 (1965-08-01), Hildreth
patent: 4042605 (1977-08-01), Hartwig

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