Abstract: Reactive dyestuffs of the formula ##STR1## in which ##STR2## and Z=a heterocyclic reactive group and the remaining groups have the meaning indicated in the description, are outstandingly suitable for dyeing and printing materials containing hydroxyl groups or amide groups.

Abstract: The reactive dyes of the formula ##STR1## in which the substituents and indices have the meaning given in the description, are outstandingly suitable for dyeing or printing naturally occurring or synthetic materials containing hydroxyl or amide groups.

Abstract: Dyestuffs of the formula ##STR1## in which the substituents have the meanings given in the description are suitable for the dyeing and printing of hydroxyl- and amido-containing materials.

Abstract: Dyestuffs in the form of their free acid have the following formula (1) ##STR1## in which the substituents have the meaning given in the description. The dyestuffs according to the invention are suitable for dyeing hydroxyl-containing fiber materials in yellow shades.

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 hydroxyl- and nitrogen-containing materials, such as cellulose, wool, silk, polyamides, polyurethanes.

Abstract: The new polyazo reactive dyestuffs of the formula ##STR1## in which the substituents have the meaning given in the description are highly suitable for the dyeing or printing of hydroxyl- or amido-containing materials. The dyeings and prints obtained are distinguished by high fibre-dyestuff bonding stability and by particularly good stability to oxidizing agents.

Abstract: Dyestuff mixtures containing one or more dyestuffs of the formula ##STR1## and one or more dyestuffs of the formula ##STR2## in which the substituents have the meanings given in the description are highly suitable for producing green cotton dyeings.

Abstract: New process for the preparation of 4,5,6-trichloropyrimidine, characterized in that a protonated dialkylaminopropionitrile of the general formula I ##STR1## in which R is C.sub.1 -C.sub.4 -alkyl and an.sup.- is an anion is treated with chlorine in an inert solvent in the presence of organic catalysts or PCl.sub.3 or PCl.sub.5.

Abstract: Chlorine-containing pyrimidines are selectively hydrogenated with elimination of hydrogen chloride, without other substituents and/or the aromatic ring being significantly attacked, by using a hydrogenation catalyst and a hydrogen chloride acceptor. This process gives predominantly new pyrimidines.

Abstract: The reduction of azoxybenzene, azobenzenes and mixtures of azoxybenzenes and azobenzene to the hydrazobenzenes is possible under mild conditions, with high yields and without any great excess of reducing agents in the presence of raney-nickel and compounds which have an alkaline action with hydrogen or hydrazine hydrate.

Abstract: Optionally metallized azo dyestuffs which in the form of the free acid correspond to the formula ##STR1## wherein K is the radical of a benzene, naphthalene, pyrazolone, pyridone, pyrimidone, acetoacetic acid arylide or aminopyrazole coupling component;A is a non-ionic substituent;X is ##STR2## wherein W is a direct bond or a bridge member to a C atom of the benzene or naphthalene nucleus or the coupling component K;R is hydrogen or C.sub.1 -C.sub.4 -alkyl;B is a direct bond or a bridge member, especially -CO- or -SO.sub.2 -, to a C atom of Q;Q is a reactive radical;m is 0, 1 or 2;n is 0, 1 or 2;p is 0 or 1;q is 0, 1 or 2; andr is 0 or 1;and their use for the dyeing and printing of natural and regenerated cellulose fibre materials such as cotton and rayon, as well as natural and synthetic polyamide fibre materials, for example those of wool, silk, poly-.epsilon.-caprolactam or polycondensate of hexamethylene-diamine and adipic acid.

Abstract: Unsymmetrical chromium mixed complex dyestuffs of the formula ##STR1## wherein R.sub.1 and R.sub.2 denote C.sub.1 -C.sub.4 -alkyl, nitrile, carbonamide or X-Z, X denotes a direct bond or a bridge member to a C atom of the rings A, B, C or D or to a 3-C atom of the pyrazoles and Z denotes SO.sub.3 H, COOH or OSO.sub.3 H and A, B, C and D can possess further substituents, are suitable for the dyeing and printing of nitrogen-containing fibrous materials in yellow shades.

Abstract: Reactive dyestuffs of the formula: ##STR1## wherein R is H, alkyl or aryl,A is a reactive groupm is 2 or 3X is hydrogen, halogen, nitro or triazolyl which are useful for dyeing or printing of cellulose and NH containing materials.

Abstract: Process for dyeing hydrophobic fibre materials, preferably polyester fibres, using dyestuffs of the formula ##STR1## wherein THE AROMATIC RINGS A and B can be further substituted,The azo group is in the meta-position or para-position relative to the amino group of the diphenylamine and the phenolic hydroxyl group is in the ortho-position or para-position relative to the azo group.These dyestuffs are distinguished by high drawing power and good building up and fastness properties.

Abstract: Process for the preparation of diaryl compounds of the formula ##STR1## by reacting of acylamino-aryl-compounds of the formula ##STR2## WITH ARYL COMPOUNDS OF THE FORMULA ##STR3## IN THE PRESENCE OF METALLIC COPPER OR ITS MIXTURE WITH COPPER SALTS, OPTIONALLY IN THE PRESENCE OF CATALYSTS, IN A SOLVENT WHICH IS INERT UNDER THE REACTION CONDITIONS, AT TEMPERATURES OF 20.degree. TO 200.degree. C. In the formulae A and B represent an aromatic ring system, R represents acyl and X represents a nitro, nitrile, carboxylic ester, acyl or --NH--R group.

Abstract: The invention relates to polyazo dyestuffs of the formula ##STR1## in which R denotes hydrogen, methyl or chlorine,X denotes methyl or ethyl andK represents a radical of the formula ##STR2## WHEREIN M DENOTES 1, 2 OR 3, OR REPRESENTS A RADICAL OF THE FORMULA ##STR3## wherein Y denotes hydrogen, chlorine, nitro, --SO.sub.3 H, alkyl, alkoxy, etc.The new dyestuffs are particularly suitable for dyeing and printing cellulose fibre materials, especially paper and cotton.

Abstract: Azo dyestuffs free of sulphonic acid groups and carboxylic acid groups are prepared by coupling a diazo compound with a coupler which is prepared by reacting an organic amine with a pyridinium salt having the formula ##STR1## IN WHICH R is substituted or unsubstituted alkyl, cycloalkyl, aralkyl or aryl; andR.sub.1 is substituted or unsubstituted alkyl or aralkyl. The dyestuffs are suitable for dyeing and printing synthetic materials such as polyolefines, polyvinyl compounds, cellulose acetate and triacetate and polyesters to give yellow to blue dyeings and prints with good fastness properties especially to light and sublimation.

Abstract: Cationic dyestuffs of the formula ##STR1## WHEREIN A and B denote aromatic-carbocyclic or aromatic-heterocyclic radicals,D denotes the groups --O--R.sub.2, ##STR2## R denotes hydrogen, alkyl, aralkyl, alkenyl, alkoxy or aryl, X denotes a bridge member andAn.sup.(.sup.-) denotes an anion,Are suitable for dyeing and printing of natural and synthetic materials, particularly of polyacrylonitrile, copolymers of acrylonitrile with other vinyl compounds, of acid modified polyesters and acid modified polyamides.

Abstract: Azo pigments which are free from groups which confer solubility in water and correspond to the formula ##STR1## wherein A represents the radical of a diazo component, X represents a hydroxy, cyanamino, ureido, acylamino or guanidino group and Y and Z independently of one another denote a hydroxyl group or an optionally substituted amino group with the proviso that at most 2 of the 3 radicals X, Y and Z represent a hydroxyl group, are suitable for pigmenting lacquers, for the preparation of printing inks, distempers or paints containing binders and for the bulk dyeing of synthetic, semi-synthetic or natural macromolecular substances.

Abstract: Azo dyestuffs of the formula ##STR1## in which D represents the radical of a diazo component,R denotes alkyl, cycloalkyl, aralkyl or aryl,X represents a nitrile group or an optional substituted carbonamide or carboxylic acid ester group,A represents oxygenWhereinR.sub.1 -r.sub.4 denote hydrogen, alkyl or aralkyl as well as their preparation and use for dyeing of synthetic materials are disclosed. For example, polyolefines, polyvinyl polymers, cellulose 2 1/2 acetate, cellulose triacetate and particularly polyesters are dyed by customary dyeing and printing proceses to give yellow to blue dyeings and prints with good fastness properties especially fastness to light and sublimation.