Patents by Inventor Tadamichi Nagashima

Tadamichi Nagashima 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).

  • Fluorous tagging and scavenging reactants and methods of synthesis and use thereof
    Patent number: 7060850
    Abstract: The present invention includes methods and compositions for increasing the fluorous nature of an organic compound by reacting it with at least one fluorous compound to produce a fluorous tagged organic compound. The increased fluorous nature of the fluorous tagged organic compound can then be utilized to separate the fluorous organic compound from untagged reagents, reactants, catalysts and/or products derived therefrom. The resultant fluorous tagged organic compound can be subjected to subsequent chemical transformations, wherein the fluorous nature of the tagged compound is utilized to increase the ease of separation of the fluorous tagged organic compound from untagged reagents, reactants, catalysts and/or products derived therefrom, after each chemical transformation.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: June 13, 2006
    Assignee: Fluorous Technologies Incorporated
    Inventors: Wei Zhang, Zhiyong Luo, Tadamichi Nagashima, Christine Hiu-Tung Chen, Marvin S. Yu
  • Solid support dirhodium catalyst compositions and methods for making and using same
    Patent number: 6962891
    Abstract: Disclosed are dirhodium catalyst compositions. One such dirhodium catalyst composition includes a dirhodium catalyst and a solid support. The dirhodium catalyst includes a Rh—Rh moiety and four bridging ligand moieties. The dirhodium catalyst and the solid support are bound together, but they are not covalently bound together via one or more of the bridging ligand moieties. Another such dirhodium catalyst composition includes a dirhodium tetracarboxylate catalyst and a solid support, and the dirhodium tetracarboxylate catalyst and the solid support are bound together. Yet another such dirhodium catalyst composition includes a dirhodium catalyst and a solid support, where the dirhodium catalyst includes a Rh—Rh moiety and where the dirhodium catalyst and the solid support are bound together via at least one of the rhodiums' axial positions. The compositions can be used in a number of reactions, including insertion reactions (e.g.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: November 8, 2005
    Assignee: The Research Foundation of State University of New York
    Inventors: Huw M. L. Davies, Tadamichi Nagashima
  • New fluorous tagging and scavenging reactants and methods of synthesis and use thereof
    Publication number: 20040073054
    Abstract: The present invention includes methods and compositions for increasing the fluorous nature of an organic compound by reacting it with at least one fluorous compound to produce a fluorous tagged organic compound. The increased fluorous nature of the fluorous tagged organic compound can then be utilized to separate the fluorous organic compound from untagged reagents, reactants, catalysts and/or products derived therefrom. The resultant fluorous tagged organic compound can be subjected to subsequent chemical transformations, wherein the fluorous nature of the tagged compound is utilized to increase the ease of separation of the fluorous tagged organic compound from untagged reagents, reactants, catalysts and/or products derived therefrom, after each chemical transformation.
    Type: Application
    Filed: July 11, 2003
    Publication date: April 15, 2004
    Inventors: Wei Zhang, Zhiyong Luo, Tadamichi Nagashima, Christine Hiu-Tung Chen, Marvin S. Yu
  • Solid support dirhodium catalyst compositions and methods for making and using same
    Publication number: 20030130112
    Abstract: Disclosed are dirhodium catalyst compositions. One such dirhodium catalyst composition includes a dirhodium catalyst and a solid support. The dirhodium catalyst includes a Rh—Rh moiety and four bridging ligand moieties. The dirhodium catalyst and the solid support are bound together, but they are not covalently bound together via one or more of the bridging ligand moieties. Another such dirhodium catalyst composition includes a dirhodium tetracarboxylate catalyst and a solid support, and the dirhodium tetracarboxylate catalyst and the solid support are bound together. Yet another such dirhodium catalyst composition includes a dirhodium catalyst and a solid support, where the dirhodium catalyst includes a Rh—Rh moiety and where the dirhodium catalyst and the solid support are bound together via at least one of the rhodiums' axial positions. The compositions can be used in a number of reactions, including insertion reactions (e.g.
    Type: Application
    Filed: August 27, 2002
    Publication date: July 10, 2003
    Inventors: Huw M. L. Davies, Tadamichi Nagashima