Process for the preparation of dyestuffs

Details Process for the preparation of dyestuffs Process for the preparation of dyestuffs

1994-09-23

1996-07-30

Richter, Johann

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

Organic compounds

Azo

534580, 534581, C09B 2904

Patent

active

055412998

ABSTRACT:
Dyestuffs of the formula ##STR1## in which D is the radical of an aromatic or heterocyclic diazo component and
K is the radical of an aromatic or heterocyclic coupling component, or is the radical of an active methylene compound,
are obtained in an ecologically advantageous manner by reacting an aromatic or heterocyclic diazo components of the formula

REFERENCES:
patent: 2978290 (1961-04-01), Bossard et al.
patent: 4432897 (1984-02-01), Furstenworth
Patent Abstracts of Japan, vol. 6, No. 177 (C-124)(1055), Sep. 11, 1982; JP-A-57-91975, "Water-Soluble Heterocyclic Azo Compound and Its Application", Doujin Kagaku Kenkyusho K.K., Jun. 8, 1982.

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