Abstract: A process for the manufacture of the heterocyclic compounds of the formula: ##STR1## wherein R is hydrogen, lower alkyl or phenyl, which comprises simultaneously decarboxylating and dinitrating a compound of the formula: ##STR2## wherein R has the meaning stated above, and finally hydrolyzing off the acyl group.

Abstract: Disperse monoazo dyestuffs from 2,3-, 3,4- or 2,5-dicyanoanilines as diazo components and N,N-dialk(en)yl-anilines having an acylamino or alkoxycarbonyl group in the 3-position as coupling components. The dyestuffs give red shades on synthetic textile materials.

Abstract: Disperse monoazo dyes having the formula: ##STR1## wherein X represents chlorine or bromine, each of R.sup.1 and R.sup.2 independently represents alkyl or alkenyl and R.sup.3 represents hydrogen, alkyl or acylamino.The dyes give bright red shades on synthetic textile materials.

Abstract: Disperse monoazo dyestuffs of the formula: ##STR1## wherein X is lower alkyl, n is 1, 2 or 3, Z is hydrogen, lower alkyl or lower alkoxy, Y is hydrogen, lower alkyl, lower alkoxy, chlorine, bromine, --NHCOX.sup.1 or --NHSO.sub.2 X.sup.2, X.sup.1 is lower alkyl, lower alkoxy, amino or N-lower alkylamino, X.sup.2 is lower alkyl, A.sup.1 and A.sup.2 are each independently lower alkylene, and R.sup.2 and R.sup.3 are each independently lower alkyl or hydroxyalkyl containing from 2 to 4 carbon atoms, together with a process of manufacture and the use of such dyestuffs for the coloration of synthetic polymeric materials particularly polyesters.

Abstract: The disperse monoazo dyestuffs of the formula: ##STR1## wherein T.sup.1 and T.sup.2 are each independently hydrogen or lower alkyl, Z is hydrogen, lower alkyl, or lower alkoxy, Y is hydrogen, lower alkyl, lower alkoxy, chlorine, bromine, --NHCOX.sup.1 or --NHSO.sub.2 X.sup.2, X.sup.1 is lower alkyl, lower alkoxy, amino or N-lower alkylamino, X.sup.2 is lower alkyl, A.sup.1 and A.sup.2 are each independently lower alkylene, R.sup.1 and R.sup.2 are each independently lower alkyl or hydroxyalkyl containing from 2 to 4 carbon atoms, and the benzene ring B can contain additional susbstituents apart from sulphonic acid groups, a process for the manufacture of the said dyestuffs, and their use for coloring synthetic textile materials in yellow to blue shades.

Abstract: Disperse monoazo dyestuffs, free from carboxylic and sulphonic acid groups, derived from 3,5-dinitro-2-amino thiophene as disazo component and an arylamine coupling component exhibit superior properties when used to give colorations to textile materials such as secondary cellulose acetate and cellulose triacetate, polyamide and aromatic polyester textile materials, said colorations having excellent fastness to light and to wet and dry heat treatments. The dyestuffs also have high tinctorial strength and excellent dyeing and build-up properties and produce depths of shade which are relatively independent of the dyebath pH, or the temperature of the dyebath or the liquor ratio of the dyebath.

Abstract: Process for the continuous coloration of aromatic polyester or cellulose triacetate textile materials and of unions of aromatic polyester with cellulose, by applying to the textile material for the polyester or triacetate a disperse azo dyestuff containing a single carboxylic acid ester group and at least two cyano groups, and for the cellulose component of a union a reactive or other dyestuff, followed by an alkaline rinse of the colored textile material.

Abstract: Process for the continuous coloration of aromatic polyester or cellulose triacetate textile materials and of unions of aromatic polyester with cellulose, by applying to the textile material for the polyester or triacetate a disperse azo dyestuff containing a single carboxylic acid ester group and at least one group selected from primary, secondary or tertiary sulphamoyl or carbamoyl; imido (especially phthalimido), hydroxy, acyloxy, sulphone (especially alkylsulphonyl) and lactone groups, and for the cellulose component of a union a reactive or other dyestuff, followed by an alkaline rinse of the colored textile material.

Abstract: Water-insoluble monoazo dyestuffs of the formula ##STR1## wherein R is optionally substituted lower alkyl or phenyl, X is .beta.-hydroxyethyl or .gamma.-chloro-.beta.-hydroxypropyl, and Y is lower alkyl, a process for the manufacture of the said dyestuffs and their use for coloring synthetic textile materials in particular aromatic polyester textile materials.

Abstract: A process for the coloration of aromatic polyester textile materials which comprises applying to the said textile materials by an aqueous dyeing, padding or printing process a disperse monoazo dyestuff, free from carboxylic acid and sulphonic acid groups, which, in one of the possible tautomeric forms, is represented by the formula: ##STR1## wherein A is phenyl or phenyl which contains at least one substituent selected from chlorine, bromine, nitro, cyano, trifluoromethyl, thiocyano, lower alkyl, lower alkoxy, lower alkylcarbonyl, lower alkylsulphonyl, lower alkylcarbonylamino, carbamoyl and N-lower alkyl and N:N-di lower alkyl derivatives thereof, sulphamoyl and N-lower alkyl and N:N-di lower alkyl derivatives thereof, sulphamato and N-lower alkyl and N:N-di lower alkyl derivatives thereof, lower alkoxycarbonyl, lower alkoxy lower alkoxycarbonyl, lower alkoxy lower alkoxy lower alkoxycarbonyl, hydroxy lower alkoxycarbonyl, hydroxy lower alkoxy lower alkoxycarbonyl, and lower alkoxycarbonyl lower alkyl.