Patents by Inventor Robert Patrick Farrell

Robert Patrick Farrell 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).

  • Process for preparing biaryl compounds
    Patent number: 5922898
    Abstract: The present invention provides a process for preparing biaryl compounds comprising reacting an arylmetal reagent selected from arylmagnesium reagents and aryllithium reagents with an arylhalide in the presence of a catalyst system comprising a catalyst selected from nickel catalysts and palladium catalysts and a cocatalyst selected from zinc cocatalysts and cadmium cocatalysts. The present invention specifically provides a process for the preparation of 2-(4'-methylphenyl)benzonitrile comprising reacting a 4-methylphenylmagnesium reagent with a 2-halobenzonitrile in the presence of a catalyst system comprising a catalyst selected from nickel catalysts and palladium catalysts and a zinc cocatalyst.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: July 13, 1999
    Assignee: Catalytica Pharmaceuticals, Inc.
    Inventors: Joseph Arthur Miller, Robert Patrick Farrell