Poorly soluble, dispersible, pyrimidingruppeholdige azo compounds for coloring hyrofobe organic fibers.

摘要

The invention comprises mono and disazo dyes of the general formula FORM:1109628/C4-C5/1 wherein A is a carbocyclic or heterocyclic aryl radical which may contain nonic substituents, including a phenyl azo group; one of R1, R2 and R3 represents an unsubstituted or non-ionically substituted phenyl radical and each other R is hydrogen or an unsubstituted or non-ionically substituted alkyl, cycloalkyl or phenalkyl group. Preferably, A is a phenyl radical substituted in the o- and/or p-positions to the azo group; a benzthiazolyl (2) radical which may be substituted or a 4-phenylazophenyl radical which may be substituted, preferably by an alkyl group. Other values of A specified include naphthalene, thiazole, indazole, pyrazole, quinoline, thiodiazole, thiophene and triazole radicals which may be substituted. Conventional diazotization and coupling methods are used and coupling may take place in presence of a wetting agent, e.g. cetyl and oleyl polyglycol ether . The dyes obtained give yellow, orange, red, scarlet and redbrown shades on synthetic fibres using disperse dyeing methods.ALSO:2,4,6-Triamino pyrimidines wherein one amino group is substituted by a phenyl group which may contain a m-chlorine atom or a p-methyl group and the other two amino groups may be substituted by methyl or ethyl groups are prepared by reacting an appropriate phenylamino dichloropyrimidine compound with aqueous ammonia or an amine at 140-160 DEG C. The preparation of the following compounds is described: 2,6 - bisamino - 4 - phenylamino - pyrimidine; 2,6 - bismethylamino - 4 - phenylamino - pyrimidine; 2,6 - bis - ethylamino - (41-methylphenylamino - pyrimidine; 4,6 - bisethylamino - 2(41-methylphenylamino) - pyrimidine and an isomeric mixture of 4,6-bisethylamino - 2 - phenylamino - pyrimidine and 2,6-bisethylamino - 4 - phenylamino - pyrimidine. The products are dyestuff intermediates (cf. Divisions C4-C5). A number of further 2,4,6-triaminopyrimidines are specified.