Catalysts made from transition metal compounds and 4, 5-diphosphinoacridine-ligands

US6290926A · kind A · utility

Assignee

• Studiengesellschaft Kohle gGmbH · DE

Inventors

• Matthias W. Haenel · Mülheim an der Ruhr, DE
• Stefan Hillebrand · Neuss, DE

Key dates

• Filing date: Jun 17, 1999
• Grant date: Sep 18, 2001
• Expiry date: Jun 17, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/847
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to the preparation of novel catalysts made from transition metal compounds and "tridentate" 4,5-diphosphinoacridine ligands ("acriphos"). The novel ligands employed herein are diphosphine compounds of 4,5-disubstituted acridine which coordinate transition metals in a three-fold way with the two phosphorus atoms and the acridine nitrogen. The invention also relates to the use of the novel catalysts for the catalysis of carbon monoxide conversion via the water-gas shift reaction (WGSR: CO+H.sub.2 O.fwdarw.CO.sub.2 +H.sub.2) and for the catalysis of the following reactions: hydroformylation, carbonylation, carboxylation, hydrogenation, hydrocyanogenation, hydrosilylation, polymerization, isomerization, cross-couplings and metathesis. The invention further relates to heretofore unknown syntheses of the 4,5-diphosphinoacridines through the reaction of 4,5-difluoroacridine with alkali metal phosphides [R.sub.2 P.sup.- M.sup.+ (M.sup.+.dbd.Li.sup.+, Na.sup.+, K.sup.+, Rb.sup.+, Cs.sup.+, preferably K.sup.+)] or through the reaction of 4,5-dibromoacridine with chlorophosphines (R.sub.2 PCl) and magnesium, and to the preparation of 4,5-difluoroacridine and 4,5-…