Bayer Aktiengesellschaft

Karl-Julius Reubke

Hans-Joachim Santel

Robert R Schmidt

Klaus Lurssen

Reinhard Lantzsch

Otto Schallner

Reiner Fischer

Albrecht Marhold

Harry Strang

Peter Dahmen

Dieter Feucht

Mark Wilhelm Drewes

Rolf Pontzen

Roland Andree

Karl-Heinz Linker

Klaus Wunderlich

Uwe Stelzer

Eckart Kranz

Walter Hohmann

Birgit Krauskopf

Wolfgang Gau

Josef W Stawitz

Hans-Samuel Bien, Deceased

Dorothee Bien

Gabriele Bien

Gerhard Berg

Substituted heterocyclyl-2H-chromenes

The herbicidally active substituted N-carbamoyl-tetrazolinones of the formula (I) ##STR1## in which R.sup.1 represents, inter alia, an (optionally substituted) phenyl radical,

Process for preparing substituted N-carbamoyl-Tetrazolinones

Intermediates of the formula ##STR1## are new, where

Herbicidal and plant growth-regulating substituted n-aryl nitrogen

A herbicidal or plant growth-regulating 6-(pent-3-yl)-1,2,4-triazin-5(4H)-one of the formula ##STR1## in which R.sup.1 represents amino and

Herbicidal and plant growth-regulating

Herbicidal and plant growth-regulating substituted N-aryl nitrogen heterocycles of the formula ##STR1## in which Het stands for ##STR2## where A stands for ##STR3## where R.sup.1 and R.sup.2 in each case independently of one another stand for hydrogen, halogen, halogenoalkyl or alkyl,

Herbicidal and plant growth-regulating substituted N-aryl nitrogen

The known .beta.-hydroxyethyl-(1,2,4-triazole) derivatives of the formula ##STR1## in which R.sup.1 represents alkyl, halogenoalkyl, alkenyl, alkinyl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, optionally substituted aryl, optionally substituted aralkyl, optionally substituted aralkenyl or an optionally substituted heterocyclic radical and

Process for the preparation of .beta.-hydroxyethyl-(1,2,4-triazole)

Known .beta.-hydroxyethyl-(1,2,4-triazole) derivatives of the formula ##STR1## in which R represents alkyl, halogenoalkyl, optionally substituted cycloalkyl or optionally substituted phenyl,

Process for the preparation of beta-hydroxyethyl-(1,2,4-triazole)

Improved process for the preparation of 1-alkylaminoanthraquinones by aminolysis of 1-nitroanthraquinones with alkylamines at elevated temperature in water and organic water-immiscible solvents, in the presence of acid-binding agents, according to which process calcium hydroxide is used as the acid-binding agent.

Process for the preparation of 1-alkylaminoanthraquinones

Process for the preparation of dianthraquinonylamines, characterized in that an optionally substituted nitroanthraquinone is reacted with an optionally substituted aminoanthraquinone in the presence of a basic-reacting alkaline earth metal compound at an elevated temperature.

Process for the preparation of dianthraquinonylamines

A process for the preparation of 1-amino-4-bromoanthraquinone-2-sulfonic acid or an alkali metal salt thereof by converting 1-aminoanthraquinone (which can be obtained by reduction of 1-nitroanthraquinone with sodium sulfide and/or sodium bisulfide or reaction of the 1-nitroanthraquinone with ammonia) by contacting the same with oleum at a temperature in the range of 90.degree. to 150.degree. C. optionally in the presence of an alkali metal sulfate and thereafter treating the so-sulfonated composition with bromine at a temperature in the range of from 60.degree. to 100.degree. C. 1-amino-4-bromoanthraquinone-2-sulfonic acid or an alkali metal salt thereof can be precipitated from the reaction mixture either by adjusting the sulfuric acid concentration thereof to 60 to 85 percent by weight or by stirring the reaction mixture into water, which optionally contains an alkali metal sulfate.

Process for the preparation of 1-amino-4-bromoanthraquinone-2-sulfonic

In the reaction of a nitroanthraquinone with ammonia in a solvent at elevated temperature to produce the corresponding aminoanthraquinone, the improvement which comprises effecting the reaction in the presence of an ammonium halide. Advantageously, the nitroanthraquinone is an .alpha.-nitroanthraquinone, the ammonium halide is at least one of ammonium chloride and ammonium bromide, and the solvent comprises at least one member selected from the group consisting of water, nitrobenzene, a glycol, an acid amide and sulfolane.

Preparation of aminoanthraquinones from nitroanthraquinones

The nitro group of an .alpha.-nitroanthraquinone is replaced by chlorine by reaction with an ionic chloride in a solvent in the presence of an acid or of a compound which eliminates an acid. The ionic chloride may be an alkali metal, alkaline earth metal, ammonium or quaternary ammonium chloride. A molten tertiary amine hydrochloride can function as the ionic chloride, the acid and the solvent. The process permits one or more nitro groups of a poly-.alpha.-nitroanthraquinone to be selectively replaced.

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Cologne, Germany

Karl-Julius Reubke