Abstract: The present invention provides the blue dyestuffs of the following formula (I), ##STR1## wherein R.sub.1, R.sub.2, X, X.sub.1, X.sub.2, Y, and Z are defined in this document. These kinds of dyestuffs are suitable for dyeing and printing of materials containing either cellulose fibers, such as cotton, synthetic cotton, hemp, and synthetic hemp, or synthetic polyamide and polyurethane fibers, such as wool, silk, and nylon.

Abstract: Compounds of the formula ##STR1## in which the variables are as defined in the claims, which are suitable as fibre-reactive dyes for dyeing widely varying fibre materials, are described.

Abstract: A red reactive dyestuff of the formula (I) ##STR1## wherein the substituents have the meaning given in the description. The red reactive dyestuff of the present invention is suitable for dying and printing on cellulose fiber such as cotton, artificial cotton, linen and artificial linen, etc., and polyamide and polyurethane fibers like wool, silk and nylon, etc. It is also suitable for dying and printing on mixed or cross-linking spinning of cellulose fiber or polyamide fiber and polyurethane fiber, polyacrylonitrile fiber and other fiber.

Abstract: Dyes of the formula ##STR1## in which A.sub.1 and A.sub.2 independently of one another are the radical of a monoazo, polyazo, metal complex azo, anthraquinone, phthalocyanine, formazan, azomethine, dioxazine, phenazine, stilbene, triphenylmethane, xanthene, thioxanthone, nitroaryl, naphthoquinone, pyrenequinone or perylenetetracarbimide dye,R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another are hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 alkyl,Y.sub.1 and Y.sub.2 independently of one another are halogen, carboxypyridinium, substituted or unsubstituted amino or a heterocyclic radical bonded via a nitrogen atom andn is a number from 1 to 7,are particularly suitable for dyeing or printing fiber materials containing hydroxyl groups or nitrogen. Dyeings with good fastness properties are obtained with a high dyeing yield.

Abstract: Reactive dyes of the formula I ##STR1## where a is 1 or 2,b is 0 or 1,Z.sup.1 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, halogen, nitro, amino, hydroxysulfonyl, C.sub.1 -C.sub.6 -alkoxycarbonyl, carbamoyl or C.sub.1 -C.sub.6 -mono- or dialkylcarbamoyl,A is methylene, carbonyl, sulfonyl or a radical of the formula CH.sub.2 --CO or CH.sub.2 --SO.sub.2,X is a direct linkage or a linker,Y.sup.1 is vinyl or a radical of the formula C.sub.2 H.sub.4 Q where Q is a group which can be eliminated under alkaline conditions,W is in case 1) the radical of a chromophore which may have further reactive groups, or in case 2) the radical of a coupling component to which additionally the radical of a diazo component may be linked via an azo bridge and which may have additional reactive groups, andL.sup.1 and L.sup.2 are each linkers,their intermediates and a process for dyeing or printing substrates having hydroxyl groups or nitrogen atoms using the novel dyes are described.

Abstract: Azo dyes of the formula (1) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another are each hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 alkyl,R.sub.5, R.sub.6, R.sub.7 and R.sub.8 independently of one another are each hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen or sulfo,D.sub.1 and D.sub.2 independently of one another are each a radical of the benzene or naphthalene series, andY.sub.1 and Y.sub.2 independently of one another are each halogen, substituted or unsubstituted amino, morpholino or piperidin-1-yl or are piperazin-1-yl which is unsubstituted or substituted on the nitrogen,with the proviso that D.sub.1 and D.sub.2 are not both sulfophenyl if Y.sub.1 and Y.sub.2 are chlorine and R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are hydrogen, are dyes for various substrates, especially cellulosic fibre materials.

Abstract: A bisazo compound represented by the following general formula (I) or its salt is a useful fiber-reactive dye: ##STR1## where D is a phenyl or naphthyl group; B is a phenylene group, etc.; U is an aliphatic or aromatic linking group; Z is a vinyl group, etc.; and X and Y are a halogen atom, a pyridinio group, etc.

Abstract: Compounds of the formula ##STR1## are described in which the variables are as defined in the claims, which compounds are suitable for use as fiber-reactive dyestuffs for dyeing a wide range of fiber materials.

Abstract: Described are compounds of formula ##STR1## which are suitable as fibre-reactive dyes for dyeing and printing a very wide range of different fibre materials.

Abstract: Dyestuffs of the formula ##STR1## wherein D is the radical of a carbo- or heterocyclic diazo component,X represents O, NH, NT, NCOT, NCCH.sub.2 T or NSO.sub.2 T,are preferably suitable, if m=n=l=o, for dyeing and printing hydrophobic synthetic fiber materials and mixtures thereof with naturally occurring fiber materials.

Abstract: The novel aminomethylnaphthalenecarboxylic acid dyestuffs of the formula (I) ##STR1## in which the substituents and indices have the meaning given in the description, are outstandingly suitable for dyeing cellulosic materials, in particular paper.

Abstract: Reactive dyes of the formula ##STR1## in which D is a radical of the formula ##STR2## are particularly suitable for dyeing or printing natural or synthetic polyamide fibre materials.

Abstract: Compounds of the formula ##STR1## in which the variables are as defined in the claims, which are suitable as fibre-reactive dyes for dyeing or printing widely varying fibre materials, are described.

Abstract: Fiber-reactive monoazo and disazo compounds of the formulaD-N.dbd.N--Kwhich compounds are in free acid or salt form, and mixtures thereof, are useful for dyeing or printing hydroxy group- or nitrogen-containing organic substrates, for example leather and fiber material comprising natural or synthetic polyamides or natural or regenerated cellulose; the most preferred substrate is a textile material comprising cotton.

Abstract: Described are compounds of formula ##STR1## which are suitable as fiber-reactive dyes for dyeing a wide range of fiber materials.

Abstract: Compounds of the formula ##STR1## in which the variables are as defined in the claims, and which are suitable as fibre-reactive dyes for dyeing and printing widely varying fibre materials, are described.

Abstract: Fibre-reactive monoazo compounds of the formula ##STR1## which compounds are in free acid or salt form, and mixtures thereof, are useful for dyeing or printing hydroxy group- or nitrogen-containing organic substrates, for example leather and fibre material comprising natural or synthetic polyamides or natural or regenerated cellulose; the most preferred substrate is a textile material comprising cotton.

Abstract: Azo dyes of the formula (1) ##STR1## in which R.sub.1 and R.sub.2 are hydrogen or C.sub.1 -C.sub.4 alkyl, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.4 alkanoylamino, ureido or halogen, X is chlorine or fluorine, B.sub.1 is phenyl, naphthyl or heterocyclic radical, and A.sub.1 is a radical of the formula (2) ##STR2## in which R.sup.7 is hydrogen, amino, N-mono- or N,N-di-C.sub.1 -C.sub.4 alkylamino or optionally substituted phenylamino and R.sub.8 is hydrogen or hydroxyl, or A.sub.1 is a radical of the formula (3) ##STR3## in which R.sub.9 is hydrogen, C.sub.1 -C.sub.8 alkyl or phenyl which is optionally substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.2 -C.sub.4 alkanoylamino, ureido, halogen or sulfo, R.sub.10 is hydrogen or C.sub.1 -C.sub.8 alkyl and R.sub.11 is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.

Abstract: Azo dyes of formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently of the other hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 alkyl,R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are each independently of one another hydrogen, halogen, sulfo, carbamoyl, carboxy, unsubstituted or hydroxy-substituted C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy;C.sub.2 -C.sub.4 alkanoylamino which is unsubstituted or substituted in the alkyl moiety by hydroxy or C.sub.1 -C.sub.4 alkoxy, or ureido which is unsubstituted or substituted in the amino end group by one or two C.sub.1 -C.sub.4 alkyl groups,Y.sub.1 is hydroxy, halogen, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, amino; N-mono-C.sub.1 -C.sub.4 alkylamino or N,N-di-C.sub.1 -C.sub.4 alkylamino, each of which is unsubstituted or substituted in the alkyl moiety by hydroxy, sulfo, carboxy or C.sub.1 -C.sub.4 alkoxy; C.sub.5 -C.sub.7 cycloalkylamino which is unsubstituted or substituted in the cycloalkyl ring by C.sub.1 -C.sub.

Abstract: Dye mixtures which comprise at least one anionic acid dye of the formula ##STR1## together with at least one anionic acid dye of the formula ##STR2## in which the substituents are as defined in claim 1, and the novel dyes of the formulae (1) and (2) are direct dyes for cellulosic fibre materials in particular. They have a high heat stability and are particularly suitable for one-bath, one-stage dyeing of polyester/cotton blend fabrics with a disperse dye for the polyester fibres under the dyeing conditions for polyester fibres.

Abstract: The invention relates to compounds of formula ##STR1## wherein the variables are as claimed in the claims and which are suitable as fibre-reactive dyes for dyeing a wide range of fibre materials.

Abstract: Novel reactive dyestuffs of the general formula ##STR1## in which A represents CH.dbd.CH, or CH.sub.2 --CH.sub.2 Z, in which Z denotes a substituent which can be split off under dyeing conditions,and in which the other groups have the meaning given in the description, show improved application properties.

Abstract: The invention relates to azo reactive dyes of the formula ##STR1## in which D denotes the radical of a diazo component of the benzene or naphthalene series,X denotes CH.dbd.CH.sub.2 or CH.sub.2 CH.sub.2 --Z, in which Z denotes a radical which can be eliminated under dyeing conditions, andin which the remaining substituents are as defined in the description.The dyes have improved applications-related properties.

Abstract: The invention is concerned with compounds according to the formula ##STR1## and their salts whereinR.sub.1 represents hydrogen or --SO.sub.3 H,R.sub.2 represents hydrogen, methyl, --NHCONH.sub.2 or --NHCOCH.sub.3 and,R.sub.3 represents hydrogen, C.sub.1-4 alkyl, preferably methyl or ethyl, or C.sub.1-4 alkyl substituted with CN, OH, Cl, F or --SO.sub.3 H.These compounds are useful as fiber-reactive dyestuffs in dyeing and printing hydroxy-group-containing and nitrogen-containing organic substrates.

Abstract: Compounds of the formula ##STR1## salts thereof, and mixtures of such compounds and salts, wherein D.sub.1 is ##STR2## wherein R.sub.1 is hydrogen, halo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, --SO.sub.3 H or --COOH,R.sub.2 is --COOH, --CONR.sub.6 R.sub.7, --SO.sub.2 NR.sub.6 R.sub.7 or --SO.sub.2 --X, wherein each of R.sub.6 and R.sub.7 is independently hydrogen, C.sub.1-4 alkyl, C.sub.2-4 -hydroxyalkyl or C.sub.2-4 sulfatoalkyl, or--NR.sub.6 R.sub.7 is a saturated 5- or 6-membered heterocyclic ring containing no hetero atom in addition to the nitrogen atom to which R.sub.6 and R.sub.7 are attached or containing one hetero atom selected from nitrogen and oxygen in addition to said nitrogen atom, which ring is unsubstituted or substituted by 1 to 3 C.sub.1-4 alkyl groups, andm is 0, 1 or 2, andD.sub.2 is ##STR3## wherein R.sub.3 is hydrogen, --SO.sub.3 H or --COOH,R.sub.4 is hydrogen, C.sub.1-4 alkyl or C.sub.1-4 alkyl monosubstituted by hydroxy, halo, cyano, --SO.sub.3 H, --OSO.sub.

Abstract: Reactive dyestuffs which, in the form of the free acid, correspond to the following formula ##STR1## wherein D is the radical of an organic dyestuff of the monoazo, polyazo or metal complex azo series and the other substituents have the meaning given in the description, show improved application properties.

Abstract: Reactive dyestuffs of the formula ##STR1## in which Z is a cyano-free pyrimidine reactive group and the remaining groups have the meaning given in the description, are highly suitable for the dyeing and printing of hydroxyl- or amido-containing materials.

Abstract: Fibre-reactive 1:1 copper complexes of the formula ##STR1## which compounds are in free acid or salt form, and mixtures thereof, are useful for dyeing or printing hydroxy group- or nitrogen-containing organic substrates, for example leather and fibre material comprising natural or synthetic polyamides or natural or regenerated cellulose; the most preferred substrate is a textile material comprising cotton.

Abstract: Fibre-reactive monoazo compounds of the formula ##STR1## which compounds are in free acid or salt form, and mixtures thereof, are useful for dyeing or printing hydroxy group- or nitrogen-containing organic substrates, for example leather and fibre material comprising natural or synthetic polyamides or natural or regenerated cellulose; the most preferred substrate is a textile material comprising cotton.

Abstract: Reactive dyes of the formula ##STR1## where A, K and Z are each as defined in the claims, are especially useful for dyeing or printing cellulosic fiber materials, producing dyeings and prints having good fastness properties in a high yield.

Abstract: Black fiber-reactive azo dye mixtures and use thereof for dyeing hydroxy- and/or carboxamido-containing fiber materialMixtures of fiber-reactive dyes are described which can be used to obtain deep black dyeings and prints on hydroxy- and/or carboxamido-containing fiber materials such as cellulose fiber materials, wool and synthetic polyamide fibers by the application methods which are customary in the art for fiber-reactive dyes. The dye mixtures comprise one or more disazo dyes of the formula (1) and one or more monoazo dyes of the formula (2) ##STR1## in which M is hydrogen or an alkali metal, R.sup.o is sulfo or carboxyl, R.sup.1 is hydrogen, methyl, ethyl, methoxy, ethoxy, sulfo or carboxy , R.sup.2 is hydrogen, methyl, ethyl, methoxy or ethoxy, Y is at each occurrence independently of the others vinyl, .beta.-chloroethyl, .beta.-phosphatoethyl, .beta.-thiosulfatoethyl or .beta.

Abstract: Fibre-reactive disazo compounds of the formula ##STR1## which compounds are in free acid or salt form, and mixtures thereof, are useful for dyeing or printing hydroxy group- or nitrogen-containing organic substrates, for example leather and fibre material comprising natural or synthetic polyamides or natural or regenerated cellulose; the most preferred substrate is a textile material comprising cotton.

Abstract: The invention relates to compounds of the formula ##STR1## where the variables are each as defined in the claims. The compounds are suitable for use as dyes, in particular for dyeing and printing cellulose-containing fibre materials and produce dyeings and prints having good allround fastness properties.

Abstract: Disazo dyes are disclosed which are particularly suitable for dyeing paper.Paper is dyed with these dyes in greenish-yellow or yellow to red shades of good fastness properties.

Abstract: Water-soluble disazo compounds, preparation thereof and use thereof as dyes There are described disazo compounds of the formula (1) ##STR1## where D is phenyl or naphthyl, R.sup.1 is hydrogen, lower alkyl, lower alkoxy, carboxyl, halogen, lower alkanoylamino or benzoylamino, R.sup.2 is hydrogen or lower alkyl, M is hydrogen or a salt-forming metal, m is 1, 2 or 3, n is 1 or 2, and R is hydrogen or lower alkyl. The compounds (1) have fiber-reactive properties and are used as dyes for dyeing and printing amino- and/or hydroxy-containing material, in particular fiber material, such as wool, silk and synthetic polyamide and also cellulose fiber materials, such as cotton; the dyeings and prints obtained are strong, fast and reddish brown.

Abstract: Novel dyestuffs of the formula (I) ##STR1## in which DK denotes a radical of the formula ##STR2## where m is 1 or 2 and DK' denotes a radical of the formula ##STR3## where n is 1 or 2 R.sub.1 represents hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkyl,R.sub.2 represents hydrogen, substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy,R.sub.3 represents substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -acylamino andR.sub.4 represents substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl.have now been found.The invention also relates to a process for their preparation and to their use for dyeing/coloring and printing textiles and paper, in particular in printing inks containing these dyestuffs.

Abstract: Reactive dyestuffs, a process for their preparation and their use and novel intermediates and a process for their preparation.Reactive dyestuffs of the formula (I) ##STR1## are described, in which A denotes a radical of the formula ##STR2## B denotes a bridging member, and R.sub.1, R.sub.2, R.sub.3, R.sub.4 and X have the meanings given in the description.

Abstract: If highly concentrated aqueous solutions of azo dyes are prepared directly by diazotization and coupling reactions, appreciable difficulties generally result as a consequence of the fact that the diazotization and coupling reactions give rise to viscous phases which lead to stirring problems in the reaction apparatus used, which in turn results in an incomplete synthesis. The novel process for preparing concentrated aqueous dye solutions of an anionic dye in an aqueous medium overcomes this disadvantage by carrying out the diazotization of the aromatic amine diazo component and/or the coupling reaction between the diazonium salt and the coupling component in the presence of an auxiliary which exerts a viscosity-reducing effect on pasty phases. Examples of such auxiliaries are optionally alkyl-substituted naphthalenesulfonic acid-formaldehyde condensation products, ligninsulfonates, polyacrylates and copolymers of maleic anhydride and methacrylic acid or acrylic acid.

Abstract: The dyestuffs of the formula ##STR1## in which D is the radical of a diazo component,SO.sub.2 X is the radical of a fibre-reactive group,and the remaining substituents have the meaning given in the descriptionare suitable for dyeing and printing hydroxyl- and amido-containing materials.

Abstract: Water-insoluble azo colorants, their preparation and use The invention relates to monoazo and disazo compounds of the formula (I) ##STR1## in which D is the radical of a carbocyclic or heterocyclic diazo or bisdiazo component, R.sup.1 and R.sup.2, independently of one another, are each a substituted or unsubstituted aryl or heteroaryl radical, X.sup.1 and X.sup.2, independently of one another, are each ring-forming ether oxygen or a substituted or unsubstituted imide grouping and n has the value 0 or 1, in which rings A and B, independently of one another, can each be additionally substituted and/or carry substituted or unsubstituted fused rings.These new compounds of the formula (I) are obtained by coupling diazotized amines or diamines of the type D--NH.sub.2 or H.sub.2 N--D--NH.sub.2 with (benzoxazol-2-yl)- or (benzimidazol-2-yl)-arylacetamides.Depending on the presence and length of alkyl chains, the compounds of the formula (I) are suitable for use as pigments, disperse dyes or oil-soluble dyes.

Abstract: Reactive dyes of the formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R', A and Y.sub.1 are as defined in claim 1, are particularly suitable for dyeing or printing cellulosic fibre materials or naturally occurring or synthetic polyamide fibre materials with a high tinctorial yield, and produce dyeings and prints having good fastness properties.

Abstract: The invention relates to compounds of the formula ##STR1## in which the variables are as defined in the claims. The compounds are suitable as dyes, in particular for dyeing and printing cellulosic fibre materials, and produce dyeings and prints with good all-round fastness properties.

Abstract: A bisazo compound of the following formula: ##STR1## wherein R.sup.1 and R.sup.3 are each hydrogen or alkyl; D is phenylene or naphthylene; one of X.sup.1 and X.sup.2 is NH.sub.2 and the other is OH; Z.sup.1 and Z.sup.2 are each --CH.dbd.CH.sub.2 or --CH.dbd.CH.sub.2 Z' in which Z' is a splittable group; B is monosulfophenylene, monosulfophenylene-methylene or mono- or di-sulfonaphthylene-methylene; U is phenylene or an aliphatic bridging group; and J is an amono-derivative group or, J may be alkoxy when X.sup.1 is OH and U is phenylene, and J may be alkoxy or phenoxy when X.sup.1 is OH and U is the aliphatic bridging group. This compound is useful for dyeing or printing fiber materials and gives a dyed or printed product having a color superior in various fastness properties with superior build-up property.

Abstract: A bisazo compound represented by the formula (I) in the free acid form, ##STR1## wherein D is unsubstituted or substituted phenyl or naphthyl; A and B are independently unsubstituted or substituted phenylene or naphthylene; R is hydrogen or unsubstituted or substituted lower alkyl; X is aromatic amino residue or aliphatic amino residue; arid Y is a group represented by the formula, ##STR2## wherein R.sup.1 is hydrogen or unsubstituted or substituted alkyl, W.sub.0 is unsubstituted or substituted alkylene; and Z is vinyl or --CH.sub.2 CH.sub.2 Z.sub.1, in which Z.sub.1 is a group capable of being split by the action of an alkali; is a reactive dye useful for dyeing or printing fiber materials having hydroxy groups and/or amide groups to brown or violet color, and can provide dyed or printed products with superior fastness properties and dyeing properties such as build-up property.

Abstract: Reactive dyestuffs of the formula ##STR1## in which the substituents have the meanings given in the description are highly suitable for the dyeing and printing of cellulose materials and nitrogen-containing materials.They produce dyeings and prints having good wet and light fastness properties.

Abstract: The invention relates to dye mixtures which contain dyes of the formulae ##STR1## and to dyes of the formula ##STR2## in which A.sub.1, A.sub.2, A.sub.3, B, B.sub.1, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, Z.sub.1, Z,.sub.2, X.sub.1, X.sub.2 and X.sub.3 are as defined in claim 1.The dyes and dye mixtures are distinguished by generally good properties and produce dyeings and prints having good wet and light fastness properties.

Abstract: Reactive dyes of the formula I ##STR1## where n is 0 or 1R.sup.1, R.sup.2 and R.sup.3 are in each case hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl,R.sup.4 is fluorine, chlorine, bromine, C.sub.1 -C.sub.4 -alkylsulfonyl, phenylsulfonyl or a radical of the formula ##STR2## L is a bridge member, A is unsubstituted or substituted C.sub.2 -C.sub.8 -alkylene,Y is vinyl or a radical of the formula --CH.sub.2 --CH.sub.2 --Q, Q being a group which can be removed under alkaline reaction conditions, andD is phenyl or naphthyl, it being possible for these radicals to be substituted, and a process for preparing reactive dyes by oxidation of the abovementioned compounds are described.

Abstract: Improved reactive dyestuffs of the following formula (I) ##STR1## in which the substituents have the meaning given in the description. The improved reactive dyestuffs are highly suitable for the dyeing and printing of natural or synthetic OH-- and/or amido-containing materials, in particular, those made of cellulose and polyamides.

Abstract: Symmetric azo dyestuffs of the formula ##STR1## wherein the substituents have the meaning given in the description, produce improved dyeings or prints on wool and cellulose materials.

Abstract: Reactive dyes of the formula ##STR1## where n is 0 or 1R.sup.1, R.sup.2 and R.sup.3 are in each case hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl,R.sup.4 is fluorine, chlorine, bromine, C.sub.1 -C.sub.4 -alkylsulfonyl, phenylsulfonyl or a radical of the formula ##STR2## L is a bridge member, A is unsubstitued or substituted C.sub.2 -C.sub.8 -alkylene,Y is vinyl or a radical of the formula --CH.sub.2 --CH.sub.2 --Q, Q being a group which can be removed under alkaline reaction conditions, andD is phenyl or naphthyl, it being possible for these radicals to be substituted,and a process for preparing reactive dyes by oxidation of the abovementioned compounds are described.