Abstract: Dyestuffs of the formula ##STR1## in which D is the radical of an aromatic or heterocyclic diazo component andK is the radical of an aromatic or heterocyclic coupling component, or is the radical of an active methylene compound,are obtained in an ecologically advantageous manner by reacting an aromatic or heterocyclic diazo components of the formulaD--NH.sub.2and a coupling component of the formulaH--Kwith a nitrite, for example NaNO.sub.2, in the presence of CO.sub.2 at a pressure of 5-100 at. The process is suitable in particular for the preparation of concentrated dye-stuff solutions, because expensive operations, such as, for example, pressure permeation and reverse osmosis, can be omitted.

Abstract: Dyestuffs of the formula ##STR1## in which D is the radical of an aromatic or heterocyclic diazo component andK is the radical of an aromatic or heterocyclic coupling component, or is the radical of an active methylene compound,are obtained in an ecologically advantageous manner by reacting an aromatic or heterocyclic diazo components of the formulaD--NH.sub.2and a coupling component of the formulaH--Kwith a nitrite, for example NaNO.sub.2, in the presence of CO.sub.2 at a pressure of 5-100 at. The process is suitable in particular for the preparation of concentrated dye-stuff solutions, because expensive operations, such as, for example, pressure permeation and reverse osmosis, can be omitted.

Abstract: Dyestuffs of the formula ##STR1## in which D is the radical of an aromatic or heterocyclic diazo component andZ is the radical of an aromatic or heterocyclic coupling component,are obtained in an ecologically advantageous manner by reacting an aromatic or heterocyclic diazo components of the formulaD--NH.sub.2and a coupling component of the formulaH--Z.sub.1with a nitrite, in the presence of CO.sub.2 at a pressure of 5-100 at. The process is suitable in particular for the preparation of concentrated dyestuff solutions, because expensive operations, such as, for example, pressure permeation and reverse osmosis, can be omitted.

Abstract: The new cationic triazatrimethine dyestuffs of the formula ##STR1## wherein the substituents B, Z, R.sup.2 and An.sup..crclbar. have the meaning given in the description, are suitable for dyeing and printing naturally occurring and synthetic materials.

Abstract: 4,4-diaryldihydroquinazolones of the formula ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3, independently of one another, denote hydrogen, halogen, alkyl, aryl, alkanoylamino, aroylamino, heteryl, NY.sup.1 Y.sup.2, OY.sup.3 or SY.sup.3, at least one of the radicalsX.sup.1, X.sup.2 or X.sup.3 standing for NY.sup.1 Y.sup.2, OY.sup.3 or SY.sup.3,R.sup.1 denotes hydrogen, alkyl, cycloalkyl, aralkyl, aryl or the members of a bridge to the o-carbon of ring C,R.sup.2 denotes a radical of an acid,Y.sup.1, Y.sup.2 and Y.sup.3, independently of one another, denote hydrogen, alkyl, cycloalkyl, aralkyl aryl or heteryl or the remaining members of a 5- or 6-membered ring which reaches to one of the o-position benzene C atoms and may contain further hetero atoms orY.sup.1 +Y.sup.

Abstract: Cationic diazacyanine dyestuffs of the formula ##STR1## and their mixtures with the isomeric dyestuffs of the formula ##STR2## wherein R represents methyl or ethyl andX.sup.- represents a colorless anion, are suitable for dyeing polyacrylonitrile and, in particular, polyacrylonitrile-wool mixtures.

Abstract: 4,4-diaryldihydroquinazolones of the formula ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3, independently of one another, denote hydrogen, halogen, alkyl, aryl, alkanoylamino, aroylamino, heteryl, NY.sup.1 Y.sup.2, OY.sup.3 or SY.sup.3, at least one of the radicals X.sup.1, X.sup.2 or X.sup.3 standing for NY.sup.1 Y.sup.2, OY.sup.3 or SY.sup.3,R.sup.1 denotes hydrogen, alkyl, cycloalkyl, aralkyl, aryl or the members of a bridge to the o-carbon of ring C,R.sup.2 denotes a radical of an acid,Y.sup.1, Y.sup.2 and Y.sup.3, independently of one another, denote hydrogen, alkyl, cycloalkyl, aralkyl aryl or heteryl or the remaining members of a 5- or 6-membered ring which reaches to one of the o-position benzene C atoms and may contain further hetero atoms orY.sup.1 +Y.sup.

Abstract: Chromogenic 4,4-diaryl-dihydroquinazolones of the formula ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3 independently of one another represent hydrogen, halogen, alkyl, aryl, alkanoylamino, aroylamino, NY.sup.1 Y.sup.2, OY.sup.3 or SY.sup.3,and whereinat least one of the radicals X.sup.1, X.sup.2 or X.sup.3 represents NY.sup.1 Y.sup.2, OY.sup.3 or SY.sup.3,R.sup.1 denotes hydrogen, alkyl, cycloalkyl, aralkyl, aryl or the members of a bridge to the o-carbon of ring C,R.sup.2 denotes hydrogen, alkyl, cycloalkyl, aralkyl, aryl, hetaralkyl or hetaryl,Y.sup.1, Y.sup.2 and Y.sup.3 independently of one another denote hydrogen, alkyl, cycloalkyl, aralkyl or aryl or the remaining members of a 5-membered or 6-membered ring which reaches to one of the benzene-C atoms in the o-position and optionally contains further hetero-atoms, orY.sup.1 +Y.sup.

Abstract: Cationic dyestuffs of the general formula ##STR1## wherein R represents hydrogen or an alkyl radical with a maximum of 8 C atoms, which is optionally substituted by non-ionic radicals,R.sup.1 represents hydrogen or an alkyl radical with a maximum of 4 C atoms, which is optionally substituted by non-ionic radicals, andAn.sup.- represents an anion, and whereinthe benzene rings and naphthalene rings can contain non-ionic radicals which are customary in dyestuff chemistry,are used for dyeing natural and synthetic cationically dyeable fibres, and paper.

Abstract: Quinophthalone dyestuffs containing sulpho groups are obtained in a particularly advantageous manner by reacting a corresponding quinaldine derivative with a phthalic anhydride at 160.degree.-240.degree. C. in quinoline.

Abstract: Pyridine-4-aldehyde phenylhydrazones are prepared by catalytic hydrogenation of 4-cyano-pyridine under normal pressure or almost normal pressure in the presence of phenylhydrazine or nuclear-substitution products thereof, in an aqueous medium in the absence of organic solvents, at a pH value between 9 and 12, preferably between 9.5 and 11, and in a temperature range from 0.degree. to 60.degree. C.

Abstract: Water-soluble cationic dyestuffs are prepared by the reaction of dyestuffs of the formula ##STR1## wherein R and R.sub.1 represent alkyl,R.sub.2 represents alkyl, aralkyl, cycloalkyl or aryl or represents alkylene which is bonded to the ring A in the o-position relative to the nitrogen atom, andAn.sup.- represents an anion,and wherein the said radicals, the ring A and the naphthalene ring can contain nonionic substituents customary in dyestuff chemistry,and wherein at least one of the radicals R and R.sub.1 contains a hydroxyl group or a halogen atom or another group which can be split off as an anion,with polyhydric alcohols in the presence of a catalyst.

Abstract: The invention relates to compounds of the formula ##STR1## wherein Z denotes OH or NR.sup.1 R.sup.2,R.sup.1 denotes hydrogen, alkyl, aralkyl, cycloalkyl or aryl,R.sup.2 denotes hydrogen or alkyl or, conjointly with R.sup.1, forms an alkylene chain.The dyestuffs are outstanding suitable for the dyeing of polyester fibres. The yellow and reddish dyeings are distinguished by good fastness to light.

Abstract: Cationic dyestuffs of the formula ##STR1## wherein A represents oxygen, sulphur or the groupings >N--R.sub.3, ##STR2## wherein R.sub.3 denotes an alkyl, aryl or aralkyl radical,R.sub.4 and R.sub.5 independently of one another denote an alkyl radical,R.sub.6 and R.sub.7 independently of one another denote hydrogen or an alkyl radical,R represents hydrogen or an alkyl group,R.sub.1 and R.sub.2 independently of one another represent hydrogen or an alkyl, aryl or aralkyl radical, orR.sub.1 can be bonded to R.sub.2 or to the ring b, andAn.sup.- represents an anion,and whereinthe rings a and b and the radicals R, R.sub.1, R.sub.2 and R.sub.3 can contain non-ionic substituents which are customary in dyestuff chemistry or carboxyl groups,are suitable for dyeing synthetic and natural materials, in particular paper.

Abstract: Acid-modified fibre materials may be dyed in brilliant color shades in accordance with the transfer printing principle if dyestuffs of the formula ##STR1## are used in which A is a residue of the formula ##STR2## wherein R.sub.1, R.sub.3, R.sub.4, R.sub.6 -R.sub.9 are H or lower alkyl, R and R.sub.2 are lower alkyl and R.sub.5 is phenyl.The resulting transfer prints are distinguished by good fastness to light, wet processing and rubbing.

Abstract: The invention relates to compounds of the formula ##STR1## WHEREIN Z denotes OH or NR.sup.1 R.sup.2,R.sup.1 denotes hydrogen, alkyl, aralkyl, cycloalkyl or aryl,R.sup.2 denotes hydrogen or alkyl or, conjointly with R.sup.1, forms an alkylene chain.The dyestuffs are outstanding suitable for the dyeing of polyester fibres. The yellow and reddish dyeings are distinguished by good fastness to light.

Abstract: The use of dyestuffs of the formula ##STR1## wherein R represents an alkyl, aralkyl, cycloalkyl or aryl radical, an alkylene radical bonded to the naphthalene ring, or hydrogen, andX represents an electron-attracting group for dyeing textiles by transfer printing.

Abstract: Naphtholactam dyestuffs of the formula ##STR1## wherein A represents the remaining members of an aromatic ring system and R represents hydrogen, alkyl, aralkyl, cycloalkyl, alkyl, aryl or an alkylene radical bonded to the naphthalene ring in the 2-position, as well as their preparation and their use for dyeing and printing natural and synthetic materials.

Abstract: Cationic dyestuffs of the formula ##STR1## wherein R denotes an alkoxy, aralkoxy, aryloxy or acylamino radical, R.sub.1 and R.sub.3 denote hydrogen or an alkyl, cycloalkyl, aralkyl or aryl radical, R.sub.2 denotes hydrogen, halogen or an alkyl, cycloalkyl, aralkyl, aryl, nitrile, carboxylic acid ester, arylazo or heterocyclic radical, A denotes members of ring an An(.sup.-) denotes an anion, are suitable for dyeing and printing of natural and synthetic materials, especially of the polymers of acrylnitrile.

Abstract: Cationic dyestuffs and processes for their manufacture and their use for dyeing, printing and bulk dyeing of natural and synthetic materials, particularly of polyacrylonitrile and copolymers of acrylonitrile with other vinyl compounds, acid modified aromatic polyesters and acid modified polyamides.