Production of aminonitrodihydroxyanthraquinones by partial reduc

Details Production of aminonitrodihydroxyanthraquinones by partial reduc Production of aminonitrodihydroxyanthraquinones by partial reduc

1976-08-30

1977-09-13

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 4968, C09B 122

Patent

active

040481999

ABSTRACT:
The production of aminonitrodihydroxyanthraquinones of the formula: ##STR1## in which one X is OH and the other X is NO.sub.2 by partial reduction of the corresponding dinitrodihydroxyanthraquinone or mixtures thereof by heating at 80.degree.-250.degree. C in the presence of 1/2 to 5 times the weight thereof of an unsubstituted or substituted phenol. The reduction is accelerated by being carried out in the presence of a small amount such as 0.5-20 mol percent of an alkaline-reacting agent. Pure aminonitrohydroxyanthraquinones are obtained which are free from diaminodihydroxyanthraquinones.

REFERENCES:
patent: 2185709 (1940-01-01), Ogilvie et al.
patent: 2273966 (1942-02-01), Klein
patent: 2480269 (1949-08-01), Seymour et al.
patent: 2485197 (1949-10-01), Grossmann
patent: 2819275 (1958-01-01), Grossmann et al.

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