Method for producing azo dye compounds

Details Method for producing azo dye compounds Method for producing azo dye compounds

1996-11-26

1999-03-30

Powers, Fiona T.

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

Organic compounds

Azo

430380, C09B 4100

Patent

active

058891633

ABSTRACT:
There is disclosed a method for producing azo dye compounds, which comprises reacting a compound represented by formula (I) or (II) with a coupling component, in the presence of an oxidizing agent. ##STR1## wherein Z.sup.1 and Z.sup.2 each represent an acyl group, a carbamoyl group, an alkoxycarbonyl group, or an aryloxycarbonyl group; X.sup.1, X.sup.2, X.sup.3, X.sup.4, and X.sup.5, each represent a hydrogen atom or a substituent, provided that the sum of the Hammett substituent constant .sigma.p values of X.sup.1, X.sup.3, and X.sup.5 and the Hammett substituent constant .sigma.m values of X.sup.2 and X.sup.4 is 0.80 or more but 3.80 or below; and R.sup.3 represents a heterocyclic group. According to the above method, azo dye compounds can be produced in a high yield by the use of hydrazines or azo compounds, both of which are safe raw materials, rather than a diazonium salt compound that involves a risk of explosion.

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