The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 2014
Filed:
Oct. 02, 2009
Roland Winde, Frankfurt, DE;
Ralf Karch, Kleinostheim, DE;
Andreas Rivas-nass, Schriesheim, DE;
Angelino Doppiu, Seligenstadt, DE;
Gerhard Peter, Freigericht, DE;
Eileen Woerner, Maintal, DE;
Roland Winde, Frankfurt, DE;
Ralf Karch, Kleinostheim, DE;
Andreas Rivas-Nass, Schriesheim, DE;
Angelino Doppiu, Seligenstadt, DE;
Gerhard Peter, Freigericht, DE;
Eileen Woerner, Maintal, DE;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
Abstract
The present invention is directed to a method for the preparation of ruthenium indenylidene carbene catalysts of the type (L)(L')XRu(II)(aryl-indenylidene). The method comprises the steps of reacting the precursor compound Ru(PPh)X(n=3-4) with a propargyl alcohol derivative in an cyclic diether solvent such as 1,4-dioxane at temperatures in the range of 80 to 130° C. and reaction times of 1 to 60 minutes. Optionally, additional neutral electron donor ligands such as PCy, phobane ligands or NHC ligands are added to the reaction mixture for ligand exchange. The method includes a precipitation step for purification, after which the product is isolated. The ruthenium-indenylidene carbene catalysts are obtained in high purity and are used as catalysts for metathesis reactions (RCM, ROMP and CM) and as precursors for the synthesis of modified ruthenium carbene catalysts.