Patents by Inventor Haizhou YU

Haizhou YU 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).

  • Crystal form of dapagliflozin intermediate and preparation method therefor
    Patent number: 10836786
    Abstract: Disclosed are a crystal form of a dapagliflozin intermediate and a preparation method therefor, and specifically disclosed are a crystal form of the dapagliflozin intermediate (2S,3R,4S,5S,6R)-2-(4-chloro-3-(4-ethoxybenzyOphenyl)-2-ethoxy-6-(methylhydroxyl) tetrahydro-2H-pyran-3,4,5-triol and a preparation method therefor. The advantages thereof lie in that an intermediate can be highly purified to obtain a sample with a purity of 99.3% or more, which has an important significance for improving the quality of the dapagliflozin, and the preparation process is simple and suitable for industrial production.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: November 17, 2020
    Assignee: Jiangsu Hansoh Pharmaceutical Group Co., Ltd.
    Inventors: Xiang Li, Jun Yu, Haizhou Yu, Jinjia Wang, Lei He, Zuyin Du
  • CRYSTAL FORM OF DAPAGLIFLOZIN INTERMEDIATE AND PREPARATION METHOD THEREFOR
    Publication number: 20190284220
    Abstract: Disclosed are a crystal form of a dapagliflozin intermediate and a preparation method therefor, and specifically disclosed are a crystal form of the dapagliflozin intermediate (2S,3R,4S,5S,6R)-2-(4-chloro-3 -(4-ethoxybenzyOphenyl)-2-ethoxy-6-(methylhydroxyl) tetrahydro-2H-pyran-3,4,5-triol and a preparation method therefor. The advantages thereof lie in that an intermediate can be highly purified to obtain a sample with a purity of 99.3% or more, which has an important significance for improving the quality of the dapagliflozin, and the preparation process is simple and suitable for industrial production.
    Type: Application
    Filed: July 21, 2017
    Publication date: September 19, 2019
    Inventors: Xiang LI, Jun YU, Haizhou YU, Jinjia WANG, Lei HE, Zuyin DU