Cobalt(II) and (I) Complexes of Diphosphine-Ketone Ligands: Catalytic Activity in Hydrosilylation Reactions.

Autor: Verhoeven DGA; Organic Chemistry & Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands., Kwakernaak J; Organic Chemistry & Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands., van Wiggen MAC; Organic Chemistry & Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands., Lutz M; Crystal and Structural Chemistry Bijvoet Center for Biomolecular Research Utrecht University Padualaan 8 3584 CH Utrecht The Netherlands., Moret ME; Organic Chemistry & Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands.
Jazyk: angličtina
Zdroj: European journal of inorganic chemistry [Eur J Inorg Chem] 2019 Feb 07; Vol. 2019 (5), pp. 660-667. Date of Electronic Publication: 2019 Jan 28.
DOI: 10.1002/ejic.201801221
Abstrakt: The hydrosilylation of unsaturated compounds homogeneously catalyzed by cobalt complexes has gained considerable attention in the last years, aiming at substituting precious metal-based catalysts. In this study, the catalytic activity of well-characterized Co II and Co I complexes of the p Tol dpbp ligand is demonstrated in the hydrosilylation of 1-octene with phenylsilane. The Co I complex is the better precatalyst for the mentioned reaction under mild conditions, at 1 mol-% catalyst, 1 h, room temperature, and without solvent, yielding 84 % of octylphenylsilane. Investigation of the substrate scope shows lower performance of the catalyst in styrene hydrosilylation, but excellent results with allylbenzene (84 %) and acetophenone (> 99 %). This catalytic study contributes to the field of cobalt-catalyzed hydrosilylation reactions and shows the first example of catalysis employing the dpbp ligand in combination with a base metal.
Databáze: MEDLINE