Process for producing anthraquinone compounds

Details Process for producing anthraquinone compounds Process for producing anthraquinone compounds

1983-10-04

1985-05-28

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260378, C07C 9724, C07C143665

Patent

active

045199477

ABSTRACT:
A process for producing 1,4-diaminoanthraquinone-2,3-disulfonic acid or a salt thereof which comprises reacting a 1,4-diamino-2,3-dihalogenoanthraquinone with a sulfonating agent in an aqueous medium in the presence of at least one of a quaternary ammonium compound and a quaternary phosphonium compound and optionally, in the presence of an inert organic solvent is disclosed. A process for producing 1,4-diamino-2,3-dicyanoanthraquinone which comprises further reacting the thus obtained 1,4-diaminoanthraquinone-2,3-disulfonic acid or salt thereof with a cyanogenation agent is also disclosed.

REFERENCES:
patent: 1975386 (1934-10-01), Baumann
patent: 2025370 (1935-12-01), Baumann
patent: 2795593 (1957-06-01), Pattison
patent: 4294769 (1981-10-01), Krock et al.
patent: 4299771 (1981-11-01), Takeshita et al.
patent: 4422973 (1983-12-01), Krock et al.

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