Process for the preparation of 1-amino-4-bromoanthraquinones

Details Process for the preparation of 1-amino-4-bromoanthraquinones Process for the preparation of 1-amino-4-bromoanthraquinones

1991-05-02

1992-05-26

Cintins, Marianne

Organic compounds -- part of the class 532-570 series

Organic compounds

Polycyclo ring system containing anthracene configured ring...

552237, C07C 4600

Patent

active

051170140

ABSTRACT:
Disclosed is a process for the preparation of 1-amino-4-bromoanthraquinones by the bromination of the corresponding 1-aminoanthraquinone wherein a 1-amino-anthraquinone is contacted with elemental bromine in the presence of a carboxylic acid solvent and added hydrobromic acid. The process is not as complicated as known processes and produces lower amounts of isomeric 1-amino-2-bromoanthraquinones.

REFERENCES:
Organic Synthesis, Coll. vol. 3, pp. 575-576, John Wiley & Son, Inc. (1955).
FIAT FINAI Report No. 1313, p. 222 (1948).

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