Patents by Inventor William A. Nugent, Jr.

William A. Nugent, Jr. 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 the preparation of optically active cycloolefins
    Patent number: 5516953
    Abstract: A process for the preparation of optically active cycloolefins based upon reaction of optically active dienes in the presence of catalyst compositions comprising molybdenum and tungsten complexes.
    Type: Grant
    Filed: March 8, 1994
    Date of Patent: May 14, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jerald Feldman, William A. Nugent, Jr.
  • Enantioselective lewis acid catalysts of the early transition metals
    Patent number: 5352836
    Abstract: Optically active Lewis acid catalysts of the early transition metals which are useful in the catalysis of asymmetric additions have been prepared. The catalyst complexes comprise an alkoxide of a group IV or group V metal and an optically active trialkanolamine or dialkanolamine ligand.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: October 4, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William A. Nugent, Jr.
  • Enantioselective lewis acid catalysts of the early transition metals
    Patent number: 5231203
    Abstract: Optionally active Lewis acid catalysts of the early transition metals which are useful in the catalysis of asymmetric additions have been prepared. The catalyst complexes comprise an alkoxide of a group IV or group V metal and an optically active trialkanolamine or dialkanolamine ligand.
    Type: Grant
    Filed: May 1, 1991
    Date of Patent: July 27, 1993
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: William A. Nugent, Jr.
  • Enantioselective hydrocyanation of aromatic vinyl compounds
    Patent number: 5175335
    Abstract: The invention provides a process for enantioselective hydrocyanation of aromatic vinyl compounds which produces nonracemic mixtures of chiral, arylpropionitriles; novel carbohydrate phosphorus and nickel catalyst compositions; and optically pure (S)-(-)-2-(6-metehoxy-2-naphthalene)propionitrile.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: December 29, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Albert L. Casalnuovo, Thaliyil V. Rajanbabu, Lawrence W. Gosser, Ronald J. McKinney, William A. Nugent, Jr.
  • Aqueous alkylation process
    Patent number: 5043510
    Abstract: This invention relates to a process for alkylation at carbon and phosphorus sites in an aqueous medium using precious metal catalysts containing sulfonated triarylphosphines (STP) of the generic formula P(C.sub.6 H.sub.4 SO.sub.3 --)X(C.sub.6 H.sub.5)Y (X+Y=3).
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: August 27, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Albert L. Casalnuovo, William A. Nugent, Jr.