Basf Aktiengesellschaft

Basf Corporation

Hans Rupert Merkle

Erich Fretschner

Hanspeter Hansen

Albrecht Mueller

Rolf Hartmuth Fischer

Rolf Pinkos

Gerhard Hamprecht

Klaus Ebel

Ulrich Müller

Toni Dockner

Hardo Siegel

Friedrich Linhart

Juergen Schroeder

Gernot Reissenweber

Bruno Sander

Bernhard Zipperer

Dirk Franke

Karl Siegfried Brenner

Wolfgang Mattmann

Bjoern Girgensohn

Karl-Friedrich Jager

Joseph F Louvar

Carsten Groening

Manfred Munzinger

Knut Koob

Gerhard Janisch

Simon A Jones

Mao-Yao Huang

Ronald R Eva

Anne Van Gastel

Karl Zoller

Hans-Richard Mueller

Alfons Durein

Albrecht Muller

Otto W&ouml;rz

Albrecht M&uuml;ller

Kurt Benz

Klaus Herbig

Helmut Fr&ouml;hlich

The present invention relates to a process for preparing 1-substituted 5-chloro-4-methylpyrazoles of the general formula Iwith the meaning for R stated in claim, in which a 4-methylpyrazole of the formula IIis reacted with chlorine, the resulting mixture of monochlorinated and dichlorinated product is fractionated by distillation, and subsequently the dichlorinated compound is dehalogenated to compound II and returned to the reaction with chlorine.

Method for producing 1 substituted 5-chloro-4 methly pyrazoles

In a process for preparing N-phosphonomethylglycine or a salt thereof by bringing phosphonomethyliminodiacetic acid or a salt thereof into contact with at least one oxygen-containing oxidant in the presence of a heterogeneous catalyst, the heterogeneous catalyst comprises at least one silicate.

Method of producing glyphosate or a salt thereof

Method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6)

Method for producing N-substituted 2-pyrazoline-5-one

A process for preparing 3-isopropyl-1H-2,1,3-benzothiadiazin-4 (3H)-one 2,2-dioxide (I) or a salt of I

Method for the production of 3-isopropyl-1H-2, 1,3-benzothiadiazine-4 (3H)-one-2,2-dioxide

Pyrazole derivatives are prepared by reacting carbonyl compounds R,&mdash;C(O)&mdash;CH(R,)&mdash;CH,R,with hydrazine, its hydrate or its salts in 30 to 100% by weight sulfuric acid in the presence of catalytic amounts of iodine or of an iodine compound.

Method for producing substituted pyrazoles

Method for isolating 3-[2-chloro-4-(trifluoromethyl)-phenoxy]-benzoic

Process for preparing solid, free-flowing water-soluble salts of

Method of preparing 1,2-dimethyl-3,5-diarylpyrazolium methylsulfates

Process for preparing N-substituted pyrazoles

Preparation of ammonium salts of 3-isopropyl-2, 1,

Preparation of optically active 2-halopropionic acids

Preparation of 3,5-diarylpyrazoles

Preparation of pyrazole and its derivatives

N-substituted-pyrazoles of the formula ##STR1## wherein R.sup.1 is C.sub.1 -C.sub.12 -alkyl or C.sub.7 -C.sub.20 -alkyl, and R.sup.2, R.sup.3 and R.sup.4 independently denote hydrogen, C.sub.1 -C.sub.12 -alkyl, phenyl, C.sub.7 -C.sub.20 -alkylphenyl and C.sub.7 -C.sub.20 -phenylalkyl, are prepared by reacting a pyrazole of the formula ##STR2## wherein R.sup.2, R.sup.3 and R.sup.4 have the meanings above, with an alcohol or ether of the formula

Preparation of N-substituted pyrazoles

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Ludwigshafen, Germany

Hans Rupert Merkle