PROCESS FOR THE PREPARATION OF WATER-SOLUBLE DISAZO COMPOUNDS AND NEW BIS-(AMINOPHENOXY)-ETHANE COMPOUNDS HAVING FIBER-REACTIVE GROUPS AS THE TETRAZO COMPONENTS

摘要

A process for preparing a water-soluble disazo compound of the formula (1) of the accompanying drawingsin which the formulae moieties occurring twice, namely K, X and Z, in each case have a meaning identical to one another and the groups Z are bonded to the two benzene nuclei in each case in the ortho- or in each case in the para-position relative to the ethylene-dioxy substituent, and the azo groups and the groups Z in the benzene nuclei are in each case bonded in the meta-position relative to one another and K is the radical of a coupling component containing a carboxy, sulfato and/or sulfo group, X denotes a hydrogen atom or a fiber-reactive group and Z is a group of the formula -SO2-CH=CH2 or -SO2-CH2-CH2-Y in which Y denotes an inorganic or organic radical which can be eliminated in an aqueous medium under alkaline or acidic conditions and X can also have the meanings of Z which comprises coupling a tetrazonium salt of a diamine of the formula (4)in which Z is defined as above or is a beta-hydroxyethylsulfonyl group, and bothe Z''s have the same meanings and in which the groups Z are bonded to the two benzene nuclei in each case in the ortho- or in each case in the para-position relative to the ethylenedioxy substituent, and the amino groups and the groups Z in the benzene nuclei are in each case bonded in the meta-position relative to one another, with the equivalent amount of a coupling component of the formula (5)in which K and X have the meanings mentioned above or X is the beta-hydroxyethylsulfonyl group, and converting beta-hyroxy-ethylsulfonyl groups, if they are present, into the beta-sulfatoethylsulfonyl groups of the general formula -SO2-CH2-CH2-OSO3 M, in which M is a hydrogen atom or an alkali metal or an equivalent of an alkaline earth metal, by means of a sulfating agent.