发明授权
US5401846A Preparation of 5-halo-2-(1-anthraquinonylamino)-benzoic acids and 4'-halo-2,1(N)-anthraquinonyl-1',2'(N)-benzacridones 失效
制备5-卤代-2-(1-蒽醌基氨基) - 苯甲酸和4'-卤代-2,1(N) - 蒽醌-1',2'(N) - 苯并吖啶酮

Preparation of 5-halo-2-(1-anthraquinonylamino)-benzoic acids and
4'-halo-2,1(N)-anthraquinonyl-1',2'(N)-benzacridones
摘要:
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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