Patents by Inventor Steven P. Nolan

Steven P. Nolan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Use a catalyst system comprising nickel palladium or platinum and imidazoline-2-ylidene or imidazolidine-2-ylidene in stille coupling reactions
    Patent number: 6362357
    Abstract: This invention provides a process for conducting Stille coupling reactions. The processes of the present invention make use of N-heterocyclic carbenes as ancillary ligands in Stille couplings of aryl halides.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: March 26, 2002
    Assignee: University of New Orleans Research & Technology Foundation
    Inventors: Steven P. Nolan, Jinkun Huang, Mark L. Trudell, Chunming Zhang
  • Catalyst system comprising transition metal and imidazoline-2-ylidene or imidazolidine-2-ylidene
    Patent number: 6316380
    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.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: November 13, 2001
    Assignee: University of New Orleans Research & Technology Foundation
    Inventors: Steven P. Nolan, Jinkun Huang, Mark L. Trudell, Chunming Zhang
  • Organosamarium catalysts for the hydroamination of olefins
    Patent number: 5110948
    Abstract: The reaction of a samarium catalyst [.eta..sup.5 --(CH.sub.3).sub.5 C.sub.5 ].sub.2 Sm(THF).sub.2 with amino-olefins provides a straightforward route to a heterocyclic compound. Alternatively, the reaction of olefins with the samarium catalyst in the presence of an amine results in an aminoalkane.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: May 5, 1992
    Assignee: Northwestern University
    Inventors: Tobin J. Marks, Steven P. Nolan, Michel R. Gagne