Hoechst Aktiengesellschaft

Clariant Corporation

Aventis Research & Technologies Gmbh & Co Kg

Hans H Schubert

Werner Knauf

Anna Waltersdorfer

Gerhard Salbeck

Manfred Kern

Hans-Peter Krause

Walter Luders

Ralf Pfirmann

Thomas Schach

Konrad Baessler

Friedrich Wunder

Otto Arndt

Wolfgang Appel

Thomas Wessel

Sergej Pasenok

Georg Grotsch

Walter Gilb

Catalyst comprising an amidophosphonium salt for halex reactions

A process for the preparation of N-carboxyalkyl-3-fluoro-4-dialkylaminoanilines, which comprises reacting, in a first step, 2-chloro-4,5-difluoronitrobenzene of the formula (I) ##STR1## with a secondary amine of the formula (II) HNR.sup.1 R.sup.2, in which R.sup.1 and R.sup.2, independently of one another, are identical or different and are an alkyl radical having from 1 to 10 carbon atoms or, together with the N atom to which they are bonded, form a ring having from 5 to 7 members, in the presence of a water-soluble amine which forms hydrofluorides and hydrochlorides which are liquid at the reaction temperature and work-up temperature or soluble in the reaction mixture, in the presence or absence of a solvent at -10 to 120.degree. C., reducing, in a second step, the reaction mixture containing the 2-chloro-4-dialkylamino-5-fluoronitrobenzene using hydrogen at from 30 to 150.degree. C. and from 1 to 350 bar in the presence of the water-soluble amine and in the presence of a noble-metal catalyst and, in a third step, reacting the reaction mixture containing the 3-fluoro-4-dialkylaminoaniline with a chloroformate of the formula (IV) ClCO.sub.2 R.sup.3, in which R.sup.3 is an alkyl radical having from 1 to 10 carbon atoms or an aralkyl radical having from 7 to 20 carbon atoms, at from 0 to 100.degree. C. in the presence of the water-soluble amine.

Process for the preparation of

The present invention relates to a process for the preparation of compounds of the formula ##STR1## in which the radicals R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are identical or different and are COOH, H, F, Cl, Br, CF.sub.3, OH, an alkoxy or alkyl radical having in each case 1 to 4 carbon atoms or a radical --NR.sup.6 R.sup.7, in which R.sup.6 and R.sup.7 are identical or different and are H, an alkyl radical having 1 to 4 carbon atoms or a phenyl radical, by dissolving in water a compound of the formula ##STR2## in which the radicals R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are identical or different and have the abovementioned meaning or, in departure therefrom, instead of H can be COOH, admixing the aqueous solution with a water-insoluble amine which is inert under the reaction conditions and carrying out the decarboxylation at a pH of 3 to 9 and a temperature of 70.degree. to 210.degree. C. in the presence or absence of a water-insoluble solvent which is inert under the reaction conditions and in the presence or absence of a decarboxylation catalyst.

Process for the preparation of aromatic compounds by decarboxylation of

Process for the preparation of aryldimethyl(3-arylpropyl)silanes by a route comprising hydrosilylation followed by a modified Grignard reaction.

Process for preparation of aryldimethyl (3-aryl-propyl)silanes

A process for the preparation of tetrachloro-1,4-benzoquinone of high purity by the action of chlorine and concentrated hydrochloric acid on hydroquinone, by introducing a part of the hydroquinone to be employed into an initially introduced 4- to 6-fold molar amount--based on the total amount of hydroquinone--of 20 to 37 % aqueous hydrochloric acid containing catalytic amounts of iron(III) ions and an anionic dispersant, introducing 1.5 to 2.0 times the molar amount--based on total hydroquinone--of chlorine as a gas into this solution at a temperature of 20.degree. to 90.degree. C., then adding the residual amount of hydroquinone as a solid or in dissolved form, introducing 1.5 to 2.0 times the molar amount of chlorine as a gas, keeping the concentration of the hydrochloric acid here at 23-25% by addition of water and finally raising the temperature to 100.degree. to 107.degree. C. with further introduction of chlorine as a gas (1.7 to 2.5 times the molar amount) and dilution with water to a hydrochloric acid concentration of 20 to 22%.

Process for the preparation of tetrachloro-1,4-benzoquinone

Process for the preparation of 1,4-bis(4-fluorobenzoyl)-benzene

The present invention relates to a process for the preparation of compounds of the formula I ##STR1## where X is CH.dbd.CH, N.dbd.CH, CH.dbd.N or S,

Process for the preparation of aryldimethyl(3-aryl-propyl)silanes

Pesticides containing at least one compound of the formula I ##STR1## where M denotes carbon or silicon,

Pesticides

Azaneophyl and silazaneophyl sulfides, processes for their preparation, agents containing them, and their use as pesticides Compounds of the formula I, their optical isomers and mixtures thereof ##STR1## where M denotes C or Si,

Silazaneophyl sulfides, and their use as pesticides

The present invention relates to a process for the preparation of compounds of the formula I ##STR1## in which Hal denotes F, Cl, Br or I; X denoted O, S or CH.sub.2 ; Y denotes CH or N; R.sup.1 denotes H or (C.sub.1 -C.sub.4 -alkyl; R.sup.2 denotes H, F, Cl or Br and R.sup.3 denotes H, F, Cl, Br, (C.sub.1 -C.sub.4)alkyl or (C.sub.1 -C.sub.4)alkoxy, which comprises reacting a compound of the formula II ##STR2## in which aryl stands for an unsubstituted or substituted phenyl, naphthyl or thienyl radical of the formulae (A), (B) or (C) ##STR3## in which R.sup.4, R.sup.5 and R.sup.6 independently of each other denote H, alkyl, alkoxy, alkylthio, dialkylamino, phenoxy, phenylthio or phenyl and m, n and o independently of each denote the values 0, 1 or 2, and X, Y, R.sup.1, R.sup.2 and R.sup.3 are as defined in formula I,

Process for the preparation of halosilanes

Azaneophyl and silazaneophyl sulfides, processes for their preparation, agents containing them, and their use as pesticides. Compounds of the formula I, their optical isomers and mixtures thereof ##STR1## where M denotes C or Si,

Azaneophyl sulfides, and their use as pesticides

New propene derivatives as intermediates for the preparation of pesticidal silane derivatives. Compounds of the formula ##STR1## wherein R.sup.4 is H, R.sup.5 is a radical of the formula ##STR2## and R.sup.17 is H or halogen are useful intermediates for the preparation of pesticidal silane derivatives.

Certain propene derivatives as intermediates for the preparation of

Compounds of the formula (I) and their stereoisomers ##STR1## wherein A, B, C' and D independently of one another denote CH or N, in which at least one of the symbols A, B, C' or D must correspond to a nitrogen atom,

Heterocyclic neophane analogs, processes for their preparation and their

The present invention relates to a process for the preparation of compounds of the formula I ##STR1## in which R.sup.1 denotes H, halogen, (C.sub.1 -C.sub.4)-alkyl or (C.sub.1 -C.sub.4)-alkoxy and

The compounds of the formula (I) ##STR1## in which X denotes CH.sub.2 or O,

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Frankfurt am Main, Germany

Hans H Schubert