Inventor

PFIRMANN RALF

DE39 patents

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PFIRMANN RALF

HOECHST AG

Process for the preparation of fluorine-containing chemical compounds

Process for the preparation of halogenated benzoic acids

2,3-difluoro-6-nitrobenzonitrile and 2-chloro-5,6-difluorobenzonitrile-(2,3-difluoro-6-chlorobenzonitrile), process for their preparation and their use for the preparation of 2,3,6-trifluorobenzoic acid

Process for the preparation of tetrafluorophthalic acid and/or tetrafluorophthalic anhydride

Halogenated cinnamic acids and esters thereof, processes for the preparation thereof and halogenated aryldiazonium salts

Process for the preparation of 2-nitro-5-fluoro- or -5-chlorophenol

Process for the preparation of 2,4-dichlorofluorobenzene

Process for the preparation of esters of aromatic carboxylic acid

Process for the preparation of esters of aromatic carboxylic acids

Process for the preparation of salts of substituted or unsubstituted phthalic acids

Cis-4-(2,2,3,3-tetrafluoropropoxy)-cinnamonitrile and trans-4-(2,2,3,3-tetrafluoropropoxy)-cinnamonitrile and a process for their preparation

Trifluorophenylene compounds, process for their preparation, and their use in liquid-crystalline mixtures

Process for the preparation of substituted 2,3-difluoropyridines

4-hydroxy-2,3,5-trifluorobenzoic acid and a process for its preparation

Process for preparing alkyl 3-hydroxy-2, 4, 5-trifluorobenzoates and/or alkyl 3-alkoxy-2, 4, 5-trifluorobenzoates

N&#39;-substituted N-amino-3,4,5,6-tetrafluorophthalimides

Process for the preparation of 2,3,4,5-tetrafluorobenzoic acid

Process for the preparation of aromatic compounds by decarboxylation of aromatic carboxylic acids

Substituted 2-chloro-3,4,5-trifluorobenzenes and a process for their preparation

Process for preparing fluorobenzonitriles

Process for producing 2,3-difluoro-6-nitrophenol

Process for the preparation of 4-alkoxy-3,5,6-trifluoro-phthalic acids and 3-alkoxy-2,4,5-trifluorobenzoic acids

N&#39;-substituted N-amino-3,4,5,6-tetrafluorophthalimides, and processes for their preparation

Process for the preparation of 3,4,6-trifluorophthalic acid and the anhydride thereof

Process for the preparation of chlorinated 4,5-difluorobenzoic acids, -benzoic acid derivatives and -benzaldehydes

CLARIANT GMBH

Process for producing quinazoline derivatives

Aminophosphonium compounds

Derivatives of 2, 3, 6-trifluorophenols and a process for their preparation

Aminophosphonium compounds

Mixtures comprising tetrakis(pyrrolidino/piperdino)phosphonium salts

Process for preparing isochroman-3-ones

Process for the preparation of 3,5-difluoroaniline

Preparation of trifluorobenzoic acids

Two-step production of 3-chloro-4-fluoro-benzoyl chloride by chlorination

Monoesters of carboxymethylene anthranilic acids and process for preparing the same

Process for preparing N-carboxymethylene-4-chloro-anthranilic acid and its dialkyl esters

Process for the preparation of isochroman-3-ones

AVENTIS RES & TECH GMBH & CO

Catalyst comprising an amidophosphonium salt for halex reactions

(unassigned)

Process for preparing amines

N'-substituted N-amino-3,4,5,6-tetrafluorophthalimides

N'-substituted N-amino-3,4,5,6-tetrafluorophthalimides, and processes for their preparation