Patents by Inventor Liansheng Zeng

Liansheng Zeng 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 and intermediates for the synthesis of 8-[{1-(3,5-bis-(trifluoromethyl)phenyl)-ethoxy}-methyl]-8-phenyl-1,7-diaza-spiro[4.5]decan-2-one compounds
    Patent number: 9822116
    Abstract: This application discloses a novel process to synthesize 8-[{1-(3,5-Bis-(trifluoromethyl)phenyl)-ethoxy}-methyl]-8-phenyl-1,7-diaza-spiro[4.5]decan-2-one compounds, which may be used, for example, as NK-1 inhibitor compounds in pharmaceutical preparations, intermediates useful in said process, and processes for preparing said intermediates; also disclosed is a process for removal of metals from N-heterocyclic carbine metal complexes.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: November 21, 2017
    Assignee: OPKO Health, Inc.
    Inventors: George G. Wu, Gerald Werne, Xiaoyong Fu, Robert K. Orr, Frank Xing Chen, Jian Cui, Victoria M. Sprague, Fucheng Zhang, Ji Xie, Liansheng Zeng, Louis Peter Castellanos, Yuyin Chen, Marc Poirier, Ingrid Mergelsberg
  • PROCESS AND INTERMEDIATES FOR THE SYNTHESIS OF 8-[-METHYL]-8-PHENYL-1,7-DIAZA-SPIRO[4.5]DECAN-2-ONE COMPOUNDS
    Publication number: 20160145256
    Abstract: This application discloses a novel process to synthesize 8-[{1-(3,5-Bis-(trifluoromethyl)phenyl)-ethoxy}-methyl]-8-phenyl-1,7-diaza-spiro[4.5]decan-2-one compounds, which may be used, for example, as NK-1 inhibitor compounds in pharmaceutical preparations, intermediates useful in said process, and processes for preparing said intermediates; also disclosed is a process for removal of metals from N-heterocyclic carbine metal complexes.
    Type: Application
    Filed: February 1, 2016
    Publication date: May 26, 2016
    Inventors: George G. Wu, Gerald Werne, Xiaoyong Fu, Robert K. Orr, Frank Xing Chen, Jian Cui, Victoria M. Sprague, Fucheng Zhang, Ji Xie, Liansheng Zeng, Louis Peter Castellanos, Yuyin Chen, Marc Poirier, Ingrid Mergelsberg
  • Process and intermediates for the synthesis of 8-[{1-(3,5-bis-(trifluoromethyl)phenyl)-ethoxy}-methyl]-8-phenyl-1,7-diaza-spiro[4.5]decan-2-one compounds
    Patent number: 9249144
    Abstract: This application discloses a novel process to synthesize 8-[{1-(3,5-Bis-(trifluoromethyl)phenyl)-ethoxy}-methyl]-8-phenyl-1,7-diaza-spiro[4.5]decan-2-one compounds, which may be used, for example, as NK-1 inhibitor compounds in pharmaceutical preparations, intermediates useful in said process, and processes for preparing said intermediates; also disclosed is a process for removal of metals from N-heterocyclic carbine metal complexes.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: February 2, 2016
    Assignee: OPKO Health, Inc.
    Inventors: George G. Wu, Gerald Werne, Xiaoyong Fu, Robert K. Orr, Frank Xing Chen, Jian Cui, Victoria M. Sprague, Fucheng Zhang, Ji Xie, Liansheng Zeng, Louis Peter Castellanos, Yuyin Chen, Marc Poirier, Ingrid Mergelsberg
  • Process and Intermediates for the Synthesis of 8-[-methyl]-8-phenyl-1,7-diaza-spiro[4.5]decan-2-one Compounds
    Publication number: 20140031549
    Abstract: This application discloses a novel process to synthesize 8-[{1-(3,5-Bis-(trifluoromethyl)phenyl)-ethoxy}-methyl]-8-phenyl-1,7-diaza-spiro[4.5]decan-2-one compounds, which may be used, for example, as NK-1 inhibitor compounds in pharmaceutical preparations, intermediates useful in said process, and processes for preparing said intermediates; also disclosed is a process for removal of metals from N-heterocyclic carbine metal complexes.
    Type: Application
    Filed: October 1, 2013
    Publication date: January 30, 2014
    Applicant: OPKO Health, Inc.
    Inventors: George G. Wu, Gerald Werne, Xiaoyong Fu, Robert K. Orr, Frank Xing Chen, Jian Cui, Victoria M. Sprague, Fucheng Zhang, Ji Xie, Liansheng Zeng, Louis Peter Castellanos, Yuyin Chen, Marc Poirier, Ingrid Mergelsberg