Patents by Inventor Sylvain Levac

Sylvain Levac 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 of synthesizing binaphthyl derivatives
    Patent number: 6333435
    Abstract: A process of synthesizing a compound of the formula 1: is disclosed, which comprises reacting a compound of the formula 2: with diphenylphosphine in the presence of an amine base and a nickel catalyst to produce a compound of formula 1.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: December 25, 2001
    Assignee: Merck & Co., Inc.
    Inventors: Dongwei Cai, David L. Hughes, Sylvain Levac, Thomas R. Verhoeven