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:
Nov. 24, 2015
Filed:
Jun. 25, 2012
Lukas Goossen, Kaiserslautern, DE;
Matthias Arndt, Kaiserslautern, DE;
Patrizia Mamone, Gruenstadt, DE;
Matthias Gruenberg, Schifferstadt, DE;
Lukas Goossen, Kaiserslautern, DE;
Matthias Arndt, Kaiserslautern, DE;
Patrizia Mamone, Gruenstadt, DE;
Matthias Gruenberg, Schifferstadt, DE;
UMICORE AG & CO. KG, Hanau-Wolfgang, DE;
Abstract
The invention provides a new method for the preparation of the dimeric Pd(l) tri-tert.-butylphosphine bromide complex, characterized by the chemical formula [Pd(μ-Br)(PBu)]. The method is based on a comproportionation reaction in which a Pd(ll) compound (═PdBr) is reacted with a Pd(0) compound (═Pd(PBu)) in organic solvents to yield the [Pd(μ-Br)(PBu)]compound having the Pd atoms in the formal oxidation state +1. Unreacted PdBrmay be reused in the process. The method is straightforward and applicable for industrial scale production and provides high product yields. Further, a new process for the isomerization of allyl ethers of the general type R—C(O)—O—CH(R)—C(R)═CHemploying the compound Pdμ-Br)(PBu)]as a catalyst is disclosed.