Patents by Inventor Thomas W. Drabb

Thomas W. Drabb 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 Production of Fused, Tricyclic Sulfonamides
    Publication number: 20110034691
    Abstract: The present invention provides methods, i.e., scalable or large-scale processes for the production of fused, tricyclic sulfonamido analogs, such as substituted or unsubstituted 5-(aryl-sulfonyl)-4,5-dihydro-1H-pyrazolo[4,3-c]quinolines and 5-(heteroaryl-sulfonyl)-4,5-dihydro-1H-pyrazolo[4,3-c]quinolines. Exemplary methods of the invention include an intra-molecular cyclization step, in which a carbon-nitrogen bond is formed, and which employs a copper-based catalyst that contains at least one organic ligand, such as DMEDA. The invention further provides compounds, which are useful as intermediates in the methods of the invention.
    Type: Application
    Filed: March 24, 2010
    Publication date: February 10, 2011
    Inventors: Michael S. Dappen, Jacek J. Jagodzinski, Lee H. Latimer, Jing Wu, Jollie Duaine Godfrey, JR., Robert Michael Matunas, Thomas W. Drabb, Gary Probst
  • Method for the preparation of certain pyridine and quinoline 2,3-dicarboxylic anhydrides
    Patent number: 4439607
    Abstract: The present invention relates to a process for the preparation of substituted pyridine and quinoline-2,3-dicarboxylic anhydrides, and the herbicidally effective imidazolinyl pyridine and quinoline compounds prepared therefrom.
    Type: Grant
    Filed: May 25, 1982
    Date of Patent: March 27, 1984
    Assignee: American Cyanamid Company
    Inventor: Thomas W. Drabb