Patents by Inventor James Winterman

James Winterman 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).

  • Method for preparing tert-leucine and analogues thereof in enantiomeric form and intermediates therein
    Patent number: 6180374
    Abstract: Azlactone (3), or the opposite enantiomer thereof, undergoes biotransformation, using suitable enzymatic activity, in the presence of a compound YH to form a N-acyl-amino acid (2), wherein R1, R2 and R3 are each not hydrogen and are independently selected from groups containing up to 20 carbon atoms, optionally with any combination of R1, R2 and R3 being joined together to form at least one ring, X is selected from groups containing up to 20 carbon atoms, and Y is selected from the group consisting of —OH, -Oalkyl and -Nalkyl. Amino acid (1), or the opposite enantiomer thereof, can be prepared in high enantiomeric excess from N-acyl amino acid (2), by converting Y to OH.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: January 30, 2001
    Assignee: Chirotech Technology, Inc.
    Inventors: Nicholas Turner, James Winterman, Raymond McCague