Monoazo compounds, process for their manufacture and their use

Abstract

Monoazo compounds of the formula ##STR1## wherein A stands for --NH--CO--NH--, --NH--CO--CO--NH-- or --NH--CO--NH--CO--, B stands for --CO-- or --CO--CO--, R.sup.1, R.sup.2 and R.sup.3 each stands for hydrogen, chlorine, methyl, methoxy, ethoxy, nitro or a group of the formula --COOR with R being hydrogen, methyl or ethyl and R.sup.4 stands for hydrogen, chlorine, methyl, methoxy or ethoxy, with the proviso that when B stands for --CO-- and when (1) A stands for --NH--CO--NH-- (a) either R.sup.4 is different from hydrogen, or (b) at least one of the radicals R.sup.1, R.sup.2 and R.sup.3 stands for nitro or COOR, or (c) at least two of the radicals R.sup.1, R.sup.2 and R.sup.3 are different from hydrogen, and when (2) A stands for --NH--CO--CO--NH-- or --NH--CO--NH--CO' (a) R.sup.4 is not in the 6-position or (b) at least one of the radicals R.sup.1, R.sup.2 and R.sup.3 is different from hydrogen, are obtained by diazotizing compounds of the formula ##STR2## and coupling the resulting diazonium compounds with compounds of the formula ##STR3## The compounds are coloring matters and are suitable in particular for pigmenting high molecular weight materials.

Dependencies are inferred from the claim text.