Evonik Degussa Gmbh

Juan Almena

Renat Kadyrov

Thomas Riermeier

Axel Monsees

Christoph Fleckenstein

Herbert Plenio

Armin Börner

Jens Holz

The invention is directed to a phosphine compound represented by general formula (1) wherein R' and R&#x2033; independently are selected from alkyl, cycloalkyl and 2-furyl radicals, or R&#x2032; and R&#x2033; are joined together to form with the phosphorous atom a carbon-phosphorous monocycle comprising at least 3 carbon atoms or a carbon-phosphorous bicycle; the alkyl radicals, cycloalkyl radicals, and carbon-phosphorous monocycle being unsubstituted or substituted by at least one radical selected from the group of alkyl, cycloalkyl, aryl, alkoxy, and aryloxy radicals; Cpis a partially substituted or completely substituted cyclopentadien-1-yl group, including substitutions resulting in a fused ring system, and wherein a substitution at the 1-position of the cyclopentadien-1-yl group is mandatory when the cyclopentadien-1-yl group is not part of a fused ring system or is part of an indenyl group. Also claimed is the use of these phosphines as ligands in catalytic reactions and the preparation of these phosphines. 

Cyclopentadienyl, indenyl or fluorenyl substituted phosphine compounds and their use in catalytic reactions

Disclosed herein are phosphine compounds represented by the general formula (4): and corresponding phosphonium salts represented by the general formula (4a): Also disclosed are processes for the preparation of these phosphines and phosphonium salts as well as their use as ligands in catalytic reactions.

The present invention is directed to a process for preparing compounds of the general formula (I). Compounds of the general formula (I) are advantageous precursors for preparing phospholane catalysts, especially bisphospholane catalysts. The invention therefore likewise provides for the use of the substances in question for preparing these catalysts. 

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Hanau, Germany

Juan Almena