Patents by Inventor Mark S. Chen

Mark S. Chen 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).

  • Selective Aliphatic C-H Oxidation
    Publication number: 20110015397
    Abstract: A composition including a complex of a metal, a tetradentate ligand, at least one ancillary ligand, and a counterion may be used for selective sp3 C—H bond oxidation. The tetradentate ligand may include a N-heterocyclic-N,N?-bis(pyridyl)-ethane-1,2-diamine group or a N,N?-bis(heterocyclic)-N,N?-bis(pyridyl)-ethane-1,2-diamine group. The composition can be used in combination with H2O2 to effect highly selective oxidations of unactivated sp3 C—H bonds over a broad range of substrates. The site of oxidation can be predicted, based on the electronic and/or steric environment of the C—H bond. In addition, the oxidation reaction does not require the presence of directing groups in the substrate.
    Type: Application
    Filed: September 23, 2010
    Publication date: January 20, 2011
    Applicant: The Board of Trustees of the University of Illinois
    Inventors: M. Christina White, Mark S. Chen
  • Selective aliphatic C-H oxidation
    Patent number: 7829342
    Abstract: A composition including a complex of a metal, a tetradentate ligand, at least one ancillary ligand, and a counterion may be used for selective sp3 C—H bond oxidation. The tetradentate ligand may include a N-heterocyclic-N,N?-bis(pyridyl)-ethane-1,2-diamine group or a N,N?-bis(heterocyclic)-N,N?-bis(pyridyl)-ethane-1,2-diamine group. The composition can be used in combination with H2O2 to effect highly selective oxidations of unactivated sp3 C—H bonds over a broad range of substrates. The site of oxidation can be predicted, based on the electronic and/or steric environment of the C—H bond. In addition, the oxidation reaction does not require the presence of directing groups in the substrate.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: November 9, 2010
    Assignee: The Board of Trustees of the Universiy of Illinois
    Inventors: M. Christina White, Mark S. Chen
  • Selective Aliphatic C-H Oxidation
    Publication number: 20090221083
    Abstract: A composition including a complex of a metal, a tetradentate ligand, at least one ancillary ligand, and a counterion may be used for selective sp3 C—H bond oxidation. The tetradentate ligand may include a N-heterocyclic-N,N?-bis(pyridyl)-ethane-1,2-diamine group or a N,N?-bis(heterocyclic)-N,N?-bis(pyridyl)-ethane-1,2-diamine group. The composition can be used in combination with H2O2 to effect highly selective oxidations of unactivated sp3 C—H bonds over a broad range of substrates. The site of oxidation can be predicted, based on the electronic and/or steric environment of the C—H bond. In addition, the oxidation reaction does not require the presence of directing groups in the substrate.
    Type: Application
    Filed: October 3, 2008
    Publication date: September 3, 2009
    Applicant: BOARD OF TRUSTEES OF UNIVERSITY OF ILLINOIS
    Inventors: M. Christina White, Mark S. Chen