Title:
【発明の名称】ジユンスイナホウコウゾク O- ヒドロキシカルボンサン - アリ-ルアミドノセイホウ
Document Type and Number:
Japanese Patent JPS5821908
Kind Code:
B2
Abstract:
Process for the preparation of pure aromatic o-hydroxy-carboxylic acid aryl amides by condensing an aromatic o-hydroxy-carboxylic acid with an aryl amine in the presence of phosphorus chlorides in an organic solvent or diluent, which process comprises treating the reaction mixture or the reaction product with 1 to 25 %, calculated on the weight of the reaction product, of an aliphatic amino-polycarboxylic acid as chelate forming agent. It is not necessary to purify the products, because they are obtained in such a pure form that they can be used directly as coupling components for azo pigments.
Inventors:
JIKUHARUTO MIITOTANKU
ADAMU RYUTSUFUERU
HANSU GARUSUTERU
ADAMU RYUTSUFUERU
HANSU GARUSUTERU
Application Number:
JP1491975A
Publication Date:
May 04, 1983
Filing Date:
February 06, 1975
Export Citation:
Assignee:
HOECHST AG
International Classes:
B01J45/00; C07B31/00; C07B43/06; C07C67/00; C07C231/00; C07C231/02; C07C233/12; C07C235/46; C07C235/66; (IPC1-7): C07C103/76; C07C102/04
Attorney, Agent or Firm:
Ezaki Mitsuyoshi