Patents by Inventor Alexander G. Dossetter

Alexander G. Dossetter 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).

  • Asymmetric cycloaddition reactions
    Patent number: 6369223
    Abstract: The present invention relates to a process for stereoselective cycloaddition reactions which generally comprises a cycloaddition reaction between a pair of substrates, each either chiral or prochiral, that contain reactive &pgr;-systems, in the presence of a non-racemic chiral catalyst, to produce a stereoisomerically enriched product. The present invention also relates to novel asymmetric catalyst complexes comprising a metal and an asymmetric tridentate ligand.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: April 9, 2002
    Assignee: President and Fellows of Harvard College
    Inventors: Eric N. Jacobsen, Scott E. Schaus, Alexander G. Dossetter, Timothy F. Jamison
  • Asymmetric cycloaddition reactions
    Publication number: 20020004602
    Abstract: The present invention relates to a process for stereoselective cycloaddition reactions which generally comprises a cycloaddition reaction between a pair of substrates, each either chiral or prochiral, that contain reactive &pgr;-systems, in the presence of a non-racemic chiral catalyst, to produce a stereoisomerically enriched product. The present invention also relates to novel asymmetric catalyst complexes comprising a metal and an asymmetric tridentate ligand.
    Type: Application
    Filed: January 4, 2001
    Publication date: January 10, 2002
    Inventors: Eric N. Jacobsen, Scott E. Schaus, Alexander G. Dossetter, Timothy F. Jamison
  • Asymmetric cycloaddition reactions
    Patent number: 6211370
    Abstract: The present invention relates to a process for stereoselective cycloaddition reactions which generally comprises a cycloaddition reaction between a pair of substrates, each either chiral or prochiral, that contain reactive &pgr;-systems, in the presence of a non-racemic chiral catalyst, to produce a stereoisomerically enriched product. The present invention also relates to novel asymmetric catalyst complexes comprising a metal and an asymmetric tridentate ligand.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: April 3, 2001
    Assignee: Harvard University
    Inventors: Eric N. Jacobsen, Scott E. Schaus, Alexander G. Dossetter, Timothy F. Jamison