Bayer Aktiengesellschaft

Lanxess Deutschland Gmbh

Adolf Sicheneder

Wilfried Nolte

Henry Giera

Harro Schlesmann

Ulrich Scholz

Joachim Haider

Torsten Pohl

Klaus Kunz

Walter Lange

Heinrich Konigshofen

Christoph Schild

Thomas Kleiner

Uwe Hugger

Adolf Brill

Fred Schuhmacher

Heinrich K&ouml;nigshofen

Dirk Ganzer

Bardo Becker

The present invention relates to a process for the production of aminodiphenyl-amines, such as 4-aminodiphenylamine (4-ADPA), by reacting nitrohalogenated benzenes with anilines in the presence of a base as well as a copper-phosphorus complex, followed by hydrogenation of the intermediately formed nitrodiphenyl-amines.

Process for the production of aminodiphenylamines

The present invention relates to a process for the preparation of nitrodiphenylamines by reaction of nitrohalogens with anilines, a base and a catalyst, and to a process for the preparation of aminodiphenylamine by hydrogenation of the nitrodiphenylamine intermediately prepared.

Process for the preparation of nitrodiphenylamines

The present invention relates to the production of aminodiphenyl-amines resulting in good yields and high purity levels when aromatic amines are reacted with nitrohalobenzenes in the presence of a palladium catalyst and a base and the product thus obtained is subsequently hydrogenated with hydrogen.

Process for producing aminodiphenylamines

The invention relates to a new process for the preparation of dithiazolyl-(2,2&prime;)-disulfides by oxidation of 2-mercaptothiazoles, to the dithiazolyl-(2,2&prime;)-disulfides that can be obtained in this way, and to the use thereof.

Process for the preparation of dithiazolyl disulfides

The invention relates to a process for the preparation of nitrodiphenylamines by reaction of nitrohalogenobenzenes with aromatic amines in the presence of a palladium catalyst and a base, the base being ground and/or dried before its use.

The invention relates to a new process for the preparation of dithiazolyl-(2,2')-disulfides by oxidation of 2-mercaptothiazoles, to the dithiazolyl-(2,2')-disulfides that can be obtained in this way, and to the use thereof.

The preparation of N-cyclohexylthiophthalimide from cyclohexylsulphenyl chloride and phthalimide can be reproduced more reliably if the cyclohexylsulphenyl chloride is prepared in sire by chlorinating dicyclohexyl disulphide.

Process for preparing N-cyclohexylthiophthalimide

Bis-benzthiazolyl alkyl sulfenimides are produced by a process in which alkyl amines are reacted with optionally substituted 2-mercaptobenzthiazoles in the presence of oxygen or oxygen-containing gases and copper and/or copper compounds and in the presence of inert organic solvents.

Process for the production of bis-benzthiazolyl alkyl sulfenimides

2-mercaptobenzothiazole and benzothiazole are prepared from dibenzothiazyl disulphide by reacting dibenzothiazyl disulphide in the presence of an alkali and/or alkaline earth hydroxide solution at temperatures from 40.degree. to 120.degree. C. until a constant pH value in the range from 8 to 10 has been reached, then treating the reaction mixture with an aqueous solution of mineral acids at temperatures from 10.degree. to 100.degree. C., and subsequently removing benzothiazole by distillation or extraction from the reaction mixture containing 2-mercaptobenzothiazole.

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Hohenlockstedt, Germany

Adolf Sicheneder