Bayer Aktiengesellschaft

Karl Steinbeck

Reinhard Lantzsch

Wilhelm Brandes

Paul Reinecke

Hans-Joachim Santel

Karl H Buchel

Gerd Hanssler

Markus Dollinger

Heinz Forster

Hans-Joachim Knops

Thomas Schmidt

Wolfgang Kramer

Ulrich Heinemann

Uwe Stelzer

Hermann Seifert

Achim Hupperts

Ulrich Kampfen

Method for producing trifluoroacetoacetic acid anilides

The application describes a process for preparing 4-hydroxyanilines by the reaction of phenols with diazonium salts and subsequent reduction.

Process for preparing 4-hydroxyanilines

The invention relates to the use of the compound N-(4-fluoro-phenyl)-N-isopropyl-chloroacetamide of the formula (I) ##STR1## which is known, as active compound in selective herbicidal compositions, for example for combating weeds in maize cultures, and to a new process for the preparation of this active compound. The compound (I) is obtained in very high yields by reacting N-isopropyl-4-fluoro-aniline with approximately equimolar amounts of chloroacetyl chloride at temperatures between 20.degree. and 150.degree. C. in the presence of an inert diluent, such as, for example, toluene, without addition of an acid binder.

Herbicidal compositions based on

The invention relates to the use of the compound N-(4-fluoro-phenyl)-N-isopropylchloroacetamide of the formula (I) ##STR1## which is known, as active compound in selective herbicidal compositions, for example for combating weeds in maize cultures, and to a new process for the preparation of this active compound. The compound (I) is obtained in very high yields by reacting N-isopropyl-4-fluoro-aniline with approximately equimolar amounts of chloroacetyl chloride at temperatures between 20.degree. and 150.degree. C. in the presence of an inert diluent, such as, for example, toluene, without addition of an acid binder.

A process for the preparation of trans-2,2-di-methyl-3-(2,2-dichlorovinyl)-cyclopropanecarboxylic acid of the formula (I) ##STR1## comprising reacting a chloroketone of the formula (II) ##STR2## in which Z represents chlorine or bromine, with an aqueous solution of an alkali metal hydroxide.

Process for the preparation of

The novel dichlorocyclopropylalkyl-hydroxyalkyl-azole derivatives of the formula ##STR1## in which R is optionally substituted cycloalkyl or optionally substituted aryl, or is a grouping of the formula ##STR2## wherein X is halogen

Dichlorocyclopropylalkyl-hydroxyalkyl azole derivatives

Fungicidally active substituted cyclopropyl oxime ethers of the formula ##STR1## in which Z represents a nitrogen atom or the CH group,

Fungicidal substituted cyclopropyl oxime ethers

Fungicidally active novel N-(3-chloro-1,2,4-oxadiazol-5-yl)-ureas of the formula ##STR1## in which R is alkyl, halogenoalkyl, or optionally substituted cycloalkyl, cycloalkylalkyl or aryl.

Growing community of inventors

Burscheid, Germany

Karl Steinbeck