Process for the preparation of fibre-reactive azo compounds cont

Details Process for the preparation of fibre-reactive azo compounds cont Process for the preparation of fibre-reactive azo compounds cont

1986-07-09

1989-08-08

Higel, Floyd D.

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

Organic compounds

Azo

534598, 534643, 534636, 534634, 534638, C09B 62026, C09B 6266, C09B 62665

Patent

active

048554103

ABSTRACT:
The invention relates to a process for the preparation of azo compounds of the formula ##STR1## wherein K is the radical of a coupling component, R is a water-solubilising group and X is a fibre-reactive radical, and the benzene ring A may be further substituted, which process comprises reacting a compound of the formula ##STR2## in an aqueous medium containing 5 to 25% by weight of an alkali metal halide or alkali metal sulfate, based on the weight of the medium, with a compound which introduces the radical X to give the compound of the formula ##STR3## diazotising said compound direct and coupling the diazotisation product with a coupling component of the formula

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