Preparation of 5-halo-2-(1-anthraquinonylamino)-benzoic acids an

Details Preparation of 5-halo-2-(1-anthraquinonylamino)-benzoic acids an Preparation of 5-halo-2-(1-anthraquinonylamino)-benzoic acids an

1993-06-23

1995-03-28

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

552259, C09B 132

Patent

active

054018463

ABSTRACT:
There are described the preparation of 5-halo-2-(1-anthraquinonylamino)benzoic acids of the general formula I ##STR1## (X.sup.1 : Cl or Br; X.sup.2 : H, Cl or Br, identical or different when n>1; n: 1-6) by reacting 2-(1-anthraquinonylamino)benzoic acids II ##STR2## with the halogen in the presence of sulfuric acid, and the preparation of 4'-halo-2,1(N)-anthraquinonyl-1',2'(N)-benzacridones III ##STR3## by cyclizing condensation of the acids I.

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Database WPI, Derwent Publications Ltd., AN 75-46730W [28], "Anthrachinondye Preparation" & JP-A-49 134 738, Dec. 25, 1974.

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