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. 13, 2001
Filed:
Feb. 22, 2000
Steven P. Nolan, New Orleans, LA (US);
Jinkun Huang, Des Plaines, IL (US);
Mark L. Trudell, Metairie, LA (US);
Chunming Zhang, New Orleans, LA (US);
University of New Orleans Research & Technology Foundation, New Orleans, LA (US);
Abstract
This invention provides a catalyst system useful in many coupling reactions, such as Suzuki, Kumada, Heck, and amination reactions. The catalyst system of the present invention makes use of N-heterocyclic carbenes or their protonated salts. The composition of the catalyst system comprises at least one transition metal compound and at least one N-heterocyclic carbene or its protonated salt. This invention further provides novel N-heterocyclic carbenes and their protonated salts. One type of N-heterocyclic carbene used in this invention is an imidazolinc-2-ylidene wherein the 1 and 3 positions are each, independently, substituted by an aromatic group in which each ortho position is, independently, substituted by a secondary or tertiary group which has at least three atoms.