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1. (WO2013160401) PROCESS FOR PREPARING DIKETONATO-RHODIUM(I)-CARBONYL COMPLEXES

Pub. No.:    WO/2013/160401    International Application No.:    PCT/EP2013/058628
Publication Date: Fri Nov 01 00:59:59 CET 2013 International Filing Date: Fri Apr 26 01:59:59 CEST 2013
IPC: C07F 15/00
Applicants: UMICORE AG & CO. KG
Inventors: WOERNER, Eileen
EBERT, Timo
KARCH, Ralf
RIVAS-NASS, Andreas
DOPPIU, Angelino
WIDMER, Juergen
Title: PROCESS FOR PREPARING DIKETONATO-RHODIUM(I)-CARBONYL COMPLEXES
Abstract:
The invention relates to a process for preparing diketonato-rhodium(I)-carbonyl complexes, especially diketonato-rhodium(I)-triorganophosphine-carbonyl complexes, for example Rh(CO)(PPh3)acac. The process according to the invention is a "one-pot synthesis" and features a process procedure without intermediate isolation stages. After introduction of an Rh(III) halide precursor into a solvent and sparging with carbon monoxide (CO), a diketo compound of the R'-C(=O)-CH2-C(=O)-R" type and a base are added, forming the intermediate compound diketonato-Rh(CO)2. After addition of a triorganophosphine of the PR3 type, the reaction mixture is heated and the diketonatocarbonyltriorganophosphine-rhodium(I) complex is removed. The process enables a rapid operation and a high yield. The complex Rh(CO)(PPh3)acac prepared in accordance with the invention, because of its purity, is particularly suitable as a catalyst or precatalyst for homogeneous catalysis, for example for hydroformylation reactions.