Process for the preparation of 1-alkylamino-anthraquinones

Details Process for the preparation of 1-alkylamino-anthraquinones Process for the preparation of 1-alkylamino-anthraquinones

1978-09-22

1979-08-07

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260689, C07C 9724

Patent

active

041637470

ABSTRACT:
Process for the preparation of 1-alkylamino-anthraquinones which comprises reacting 1-nitroanthraquinone with a monoalkylamine in the presence of an ether, a hydrocarbon or a mixture of an ether and a hydrocarbon. The 1-alkylamino-anthraquinones which are obtained can be employed directly as dyestuffs or used, without further purification, for the production of dyestuffs. Process of the invention results in the procurement of 1-alkylamine-anthraquinones of high purity and in high yield and avoids the formation of undesired by-products.

REFERENCES:
patent: 3491126 (1970-01-01), Schwander et al.
patent: 3931253 (1976-01-01), Krehmueller et al.
patent: 4000167 (1976-12-01), Hohmann et al.
patent: 4021456 (1977-05-01), Seha
Anthracene and Anthraquinone, E. de Barry, Barnett, D. Van Nostrand Comp., N.Y. 1921, pp. 198-199.

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