Process for the preparation of anionic quinophthalone dyestuffs

Details Process for the preparation of anionic quinophthalone dyestuffs Process for the preparation of anionic quinophthalone dyestuffs

1981-06-01

1983-08-02

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C09B 2500

Patent

active

043967680

ABSTRACT:
Quinophthalone dyestuffs containing sulpho groups are obtained in a particularly advantageous manner by reacting a corresponding quinaldine derivative with a phthalic anhydride at 160.degree.-240.degree. C. in quinoline.

REFERENCES:
patent: 2092238 (1937-09-01), Bailey
patent: 3152132 (1964-10-01), Clarke
patent: 3301860 (1967-01-01), Clarke
patent: 3872131 (1975-03-01), Wallace

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