Patents by Inventor An SHEN

An SHEN 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).

  • N-heterocyclic carbene type palladium catalyst and its preparation method as well as applications
    Patent number: 9656256
    Abstract: The present invention relates to an n-heterocyclic carbene (NHC) type palladium catalyst and its preparation method as well as applications. Its preparation process is as below: select glyoxal as the raw material to synthesize glyoxaldiimine in the presence of Lewis acid or Bronsted acid, and then react with paraformaldehyde to get the NHC type ligand. Use palladium(II) to react with the compound containing carbon-nitrogen double bonds to get palladium(II) cyclic dimer; make the palladium cyclic dimer and the NHC type ligand coordinated to get the NHC type palladium catalyst. The palladium catalyst with a brand new structure according to the present invention, boasts high activity and multi-purpose.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: May 23, 2017
    Assignee: SHANGHAI RESEARCH INSTITUTE OF CHEMICAL INDUSTRY CO., LTD.
    Inventors: An Shen, Yucai Cao, Xiangyang Wu, Xiaofeng Ye, Chen Ni, Yongqing Li
  • N-HETEROCYCLIC CARBENE TYPE PALLADIUM CATALYST AND ITS PREPARATION METHOD AS WELL AS APPLICATIONS
    Publication number: 20160175828
    Abstract: The present invention relates to an n-heterocyclic carbene (NHC) type palladium catalyst and its preparation method as well as applications. Its preparation process is as below: select glyoxal as the raw material to synthesize glyoxaldiimine in the presence of Lewis acid or Bronsted acid, and then react with paraformaldehyde to get the NHC type ligand. Use palladium(II) to react with the compound containing carbon-nitrogen double bonds to get palladium(II) cyclic dimer; make the palladium cyclic dimer and the NHC type ligand coordinated to get the NHC type palladium catalyst. The palladium catalyst with a brand new structure according to the present invention, boasts high activity and multi-purpose.
    Type: Application
    Filed: May 28, 2014
    Publication date: June 23, 2016
    Inventors: An SHEN, Yucai CAO, Xiangyang WU, Xiaofeng YE, Chen NI, Yongqing LI