Patents by Inventor Jianqiang QIAN

Jianqiang QIAN 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).

  • Crizotinib preparation method
    Patent number: 9604966
    Abstract: The present invention relates to the technical field of medicine and organic synthesis, particularly to a method for preparing crizotinib. The method comprises the compound of formula b and the compound of formula e undergoing Suzuki coupling reaction to produce the compound of formula a which then was subjected to deprotection to afford (±) crizotinib.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: March 28, 2017
    Assignee: Zhejiang Jiuzhou Pharmaceutical Co., Ltd
    Inventors: Yuanqiang Li, Jianqiang Qian, Daqing Che
  • Crizotinib Preparation Method
    Publication number: 20150307476
    Abstract: The present invention relates to the technical field of medicine and organic synthesis, particularly to a method for preparing crizotinib. The method comprises the compound of formula b and the compound of formula e undergoing Suzuki coupling reaction to produce the compound of formula a which then was subjected to deprotection to afford (±) crizotinib.
    Type: Application
    Filed: February 13, 2014
    Publication date: October 29, 2015
    Inventors: Yuanqiang LI, Jianqiang QIAN, Daqing CHE