Aventis Research & Technologies Gmbh & Co Kg

Hoechst Aktiengesellschaft

Clariant Corporation

Axiva Gmbh

Aventis Research & Technology Gmbh & Co. Kg

Peter Gross

Holger Geissler

Bianca Guckes

Matthias Beller

Thomas Gerdau

Daniel Decker

Hartmut Fischer

Sandra Bogdanovic

Michael Klimpel

Method for the catalytic production of substituted bipyridyl derivatives

The invention relates to a process for preparing monofunctional, bifunctional and polyfunctional aromatic olefins of the formula (I)

Process for preparing aromatic olefins by using palladaphosphacyclobutanes as catalysts

Process for recovering cobalt carbonyl catalysts used to produced

Dipalladaphosphacyclobutanes and a process for preparing the same

Good yields and selectivities are achieved in a process for preparing an isochroman-3-one of the formula (I) ##STR1## by reacting a 1,3-dihydroisobenzofuran of the formula (II) ##STR2## with carbon monoxide at a CO pressure of from 0.1 to 20 MPa in the presence of an ionic halide, a palladium catalyst and a dipolar aprotic solvent.

Process for the catalytic preparation of 3-isochromanones from phthalans

A process for the preparation of N-acylglycine derivatives of the formula (I) ##STR1## which comprises reacting a carboxylic acid amide with an aldehyde in the presence of a solvent and an acid to give an acylaminomethylol and then carbonylating the acylaminomethylol in the presence of a cobalt carbonyl catalyst.

Process for the preparation of N-acyl-.alpha.-amino acid derivatives

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Kelsterbach, Germany

Peter Gross