Hoechst Aktiengesellschaft

Solvay Fluor Und Derivate Gmbh

Aventis Research & Technologies Gmbh & Co Kg

Hoechst Research & Technology Gmbh & Co. Kg

Hoechst Schering Agrevo Gmbh

Herberts Gmbh

Solvay Fluor Gmbh

Wolfgang Appel

Sergej Pasenok

Gunter Siegemund

Freimund Rohrscheid

Thomas Wessel

Ivan Cabrera

Martin Winter

Juergen Otto Besenhard

Lars Henning Lie

Georg Pawlowski

Ralf Pfirmann

Horst Roeschert

Walter Spiess

Hans H Schubert

Thomas Schach

Frank Ebmeyer

Tobias Metzenthin

Walter Herr

Electrolyte system for lithium batteries, the use thereof, and method for enhancing the safety of lithium batteries

The present invention concerns a method for producing esters of 2-fluoro-iso butyric acid in which the corresponding 2-hydroxyisobutyric acid ester is reacted with hydrofluoric acid.

Method for producing 2-fluoro-isobutyric acid esters

Method for producing compounds containing fluorine, in particular

Electrolyte systems for lithium batteries of increased safety comprise at least one lithium-containing conducting salt and at least one electrolyte fluid and, according to the invention, are defined by at least one partially fluorinated carbamate of general formula (I) ##STR1## where R.sup.1 and R.sup.2 independently of one another or identical or different, linear C.sub.1 -C.sub.6 -alkyl, branched C.sub.3 -C.sub.6 -alkyl, C.sub.3 -C.sub.7 -cycloalkyl or R.sup.1 and R.sup.2 directly or via one or more additional nitrogen and/or oxygen atoms are linked to form a ring having from 3 to 7 ring members, and the additional nitrogen atoms present in the ring being substituted with C.sub.1 -C.sub.3 -alkyl and the ring carbon atoms optionally carrying C.sub.1 -C.sub.3 -alkyl, with the option of one or more hydrogen atoms in the radicals R.sup.1 and R.sup.2 being replaced by fluorine atoms, R.sup.3 is a partially fluorinated or perfluorinated straight-chain alkyl group having from 1 to 6 carbon atoms, is a partially fluorinated or perfluorinated branched alkyl group having from 3 to 6 carbon atoms or a partially fluorinated cycloalkyl group having from 3 to 7 carbon atoms, which optionally be monosubstituted or polysubstituted with C.sub.1 -C.sub.6 -alkyl.

Electrolyte system for lithium batteries and use of said system, and

Catalyst comprising an amidophosphonium salt for halex reactions

The present invention relates to novel stabilized phosphorous ylides and processes for their preparation. More particularly, the present invention relates to a process for substituting the carbonyl oxygen of 2-formyl- or 2-oxoalkylidenetriphenyl-phosphoranes (OATP) by other stabilizing groups to form novel compounds having an increased tendency to form complexes or compounds which absorb in the visible region of the spectrum. The compounds according to the present invention are

Process for the preparation of novel stabilized phosphorus ylides

A process for the preparation of compounds of the formula (1) in which R.sup.1, R.sup.2 and R.sup.3 are as defined in the specification, which includes reacting alcohols or carboxylic acids of the formula (2) in which R.sup.1, R.sup.2 and R.sup.3 are as defined in the specification, with a fluorinating agent of the formula (3) as defined in the specification.

Process for the selective preparation of monofluoro derivatives

It is known to prepare fluorinated aromatic compounds of the formula I ##STR1## in which X, Y and Z can have the meaning specified in the description, by reacting aromatic compounds of the formula II ##STR2## in which X, Y and Z have the meaning specified for formula I, with fluorine in a reaction medium. According to the invention, the direct fluorination is carried out in a reaction medium containing polyfluoroalkanesulfonic acids of the formula III

Process for preparing fluorinated aromatics

Sulfonic acid esters, radiation-sensitive mixtures prepared therewith

The invention relates to compounds of the formula (I) ##STR1## which R is hydrogen or (C.sub.1 -C.sub.4)-alkyl, to a process for their preparation and to their use as electrophilic fluorinating agents.

1,2,3-Oxathiazin-4(3F)-one 2,2-dioxides, a process for their preparation

Process for preparing trifluoroethyl sulfur compounds from thiolates and 1-chloro-2,2,2-trifluoroethane. The invention relates to the preparation of trifluoroethyl sulfur compounds of the formula RSCH.sub.2 CF.sub.3 by reacting 1-chloro-2,2,2-trifluoroethane CH.sub.2 Cl--CF.sub.3 in a polar aprotic solvent with salts of thiols of the formula RSH, where R can be an alkyl or aryl radical or a heterocyclic radical.

Process for preparing trifluoroethyl sulfur compounds from thiolates and

The invention relates to compounds of the formula (I) ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are, independently of one another, hydrogen, CF.sub.3, NO.sub.2, CN, halogen, --S(NSO.sub.2 CF.sub.3)CF.sub.3, (C.sub.1 -C.sub.4)-alkyl, phenyl, SO.sub.2 R.sup.5, COOR.sup.5, NR.sub.2.sup.5, where R.sup.5 is (C.sub.1 -C.sub.4)-alkyl, which can also be fluorinated, or phenyl, or R.sup.1 and R.sup.2, R.sup.2 and R.sup.3 or R.sup.3 and R.sup.4 together form an aliphatic or aromatic ring which can also contain an oxygen, sulfur or nitrogen atom. The invention further provides a process for preparing the compounds of the formula (I), which comprises reacting compounds of the formula (II) ##STR2## where R.sup.1 to R.sup.4 are as defined above and X is hydrogen or an alkali metal, with elemental fluorine in the presence of an inert solvent and, if desired, an alkali metal fluoride at low temperatures. The invention further provides for the use of the compounds of the formula (I) for the fluorination of compounds having carbanion character.

Benz-1,2,3-oxathiazin-4(3F)-one-2,2-dioxides, a process for their

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Kelkheim, Germany

Wolfgang Appel