Bayer Aktiengesellschaft

Dystar Textilfarben Gmbh & Co. Deutschland Kg

S. C. Johnson Son, Inc.

Agfa-gevaert Ag

Dy Star Textilfarben Gmbh & Co.

Rainer Hamprecht

Wilhelm Brandes

Ingeborg Hammann

Erich Klauke

Peter Roessler

Alfons Hartmann

Otto Schallner

Peter Bergthaller

Manfred Hoppe

Nigel Hall

Klaus Leverenz

Paul Marx

Artur Haus

Manfred Lorenz

Hartwig Jordan

Rudolf Stolzenburg

Anthony Lawrence

Michael Kressner

Georg Pape

Andreas Endres

Mike-Dirk Bublitz

Dietmar Kisters

Heinz-Dietrich Jordan

Claudia Muller

The present invention relates to a dyestuff of the formula (I) wherein

Disperse azo dyestuffs

The invention relates to insecticide-comprising polymer-based compositions which, in order to recognize the point in time when the insecticide is exhausted, comprise at least one dye which, after the insecticide has evaporated, turns a different colour.

Dyed compositions containing insecticides

Hydroxypyridonemethide azo dyes

Thermomigrationfast azo dyes

Pyridone-methide azo dyestuffs

Dyestuffs of the formula ##STR1## wherein D is the radical of a carbo- or heterocyclic diazo component,

Pyridone-methide azo dyestuffs with improved dyeing and printing

A process for the preparation of compounds of the formula ##STR1## wherein the substituents X, Y and Z have the meaning given in the description, by reaction of compounds of the formula ##STR2## with a cyanide and an oxidizing agent other than Br.sub.2 in the presence of halides which offers industrial hygiene advantages and renders possible large-scale industrial access to dyestuff syntheses has been found.

Cyanation of double bond systems

Mixtures of dyestuffs of the formulae (I) and (II) ##STR1## which are outstanding substitute products for the anthraquinone dyestuff Disperse Blue 56, have been found.

Mixtures of blue disperse azo dyestuffs

Azo dyestuffs of the formula ##STR1## in which X denotes H, F, Cl, Br, I, R, CO.sub.2 R, CN, CF.sub.3 and the like,

Azo dyestuffs in which the coupling component contains an N,N-bis(alkoxy

Disperse dyestuffs of the formula ##STR1## in which A/B denotes H, alkyl, C1 or O-alkyl,

Monazo compounds containing a 1-phenyl-2-pyrazoline coupling component

Process for the coloring of thermoplastics in the mass, characterized in that dyestuffs of the formula ##STR1## are used in which X denotes H, alkyl, preferably C.sub.1 -C.sub.6 -alkyl, cycloalkyl, preferably C.sub.5 -C.sub.6 -cycloalkyl, CF.sub.3, halogen, preferably F, Cl, Br,

Colored thermoplastic resin composition

2-Aminothiophenes of the formula ##STR1## wherein R=substituent and n=0-4, are prepared by dehydrogenating ring closure of thioamides of the formula ##STR2## The 2-aminothiophenes are useful for preparing useful azo dyestuffs. A process for preparing a compound of the formula ##STR3## comprising reacting a compound of the formula ##STR4## in which R and n have the abovementioned meanings with a compound of the formula ##STR5## in which T denotes NH.sub.2, aryl or alkyl, in the presence of an acid. An azo dyestuff of the formula ##STR6## in which V denotes Cl, Br or CF.sub.3,

Process for preparing 2-amino-thiophenes and azo dyestuffs prepared

Benzothiazoles of the formula ##STR1## in which R represents H, NH.sub.2 or R.sub.1, R.sub.1 denoting alkyl or aryl, and it being possible for the ring A to have other substituents, are obtained in a simple manner by reacting the readily accessible compounds of the formula ##STR2## in which X denotes a leaving group and

Process for the preparation of benzothiazoles

Halftone gravure printing inks containing an azo dyestuff

Aniline derivatives of the formula ##STR1## wherein X=alkyl,

Azo dyestuffs from cyano-amino-benzisothiazoles

Growing community of inventors

Odenthal, Germany

Rainer Hamprecht