Patents by Inventor Canming Zhang

Canming Zhang 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).

  • Application of iridium complexes in asymmetric catalytic hydrogenation of unsaturated carboxylic acids
    Patent number: 8692018
    Abstract: The present invention relates to a preparation method of carboxylic acids with optical activity, particularly, publishes that very useful chiral carboxylic acids can be obtained by the asymmetric catalytic hydrogenation of tri-substituted ?,?-unsaturated carboxylic acids, with the complexes of the chiral phosphor nitrogen ligands and iridium used as the catalysts which show high activity and enantioselectivity (up to 99.8% ee), thus provides a more efficient method with higher enantioselectivity for asymmetric catalytic hydrogenation of chiral carboxylic acid-like compounds, and has important application value to asymmetric hydrogenation of chiral carboxylic acids.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: April 8, 2014
    Assignee: Zheijiang Jiuzhou Pharmaceutical Co., Ltd.
    Inventors: Qilin Zhou, Shen Li, Shoufei Zhu, Canming Zhang, Lixin Wang
  • APPLICATION OF IRIDIUM COMPLEXES IN ASYMMETRIC CATALYTIC HYDROGENATION OF UNSATURATED CARBOXYLIC ACIDS
    Publication number: 20110092732
    Abstract: The present invention relates to a preparation method of carboxylic acids with optical activity, particularly, publishes that very useful chiral carboxylic acids can be obtained by the asymmetric catalytic hydrogenation of tri-substituted ?,?-unsaturated carboxylic acids, with the complexes of the chiral phosphor nitrogen ligands and iridium used as the catalysts which show high activity and enantioselectivity (up to 99.8% ee), thus provides a more efficient method with higher enantioselectivity for asymmetric catalytic hydrogenation of chiral carboxylic acid-like compounds, and has important application value to asymmetric hydrogenation of chiral carboxylic acids.
    Type: Application
    Filed: January 20, 2009
    Publication date: April 21, 2011
    Applicant: Zheijiang Jiuzhou Pharmaceutical Co., Ltd.
    Inventors: Qilin Zhou, Shen Li, Shoufei Zhu, Canming Zhang, Lixin Wang