Patents by Inventor Guangming Sang

Guangming Sang 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).

  • Method for preparing trifluridine
    Patent number: 11702439
    Abstract: The present application relates to a method for preparing trifluridine, comprising reacting a compound of formula III with a compound of formula IV in a first solvent in the presence of an acid to obtain a compound of formula II, and performing further reaction to obtain trifluridine.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: July 18, 2023
    Assignee: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Lin Liu, Rui Zhao, Guangming Sang, Xingjian Zhou, Xiaopeng Guo, Aiming Zhang, Gang Wu, Chunguang Xia, Xiquan Zhang
  • METHOD FOR PREPARING TRIFLURIDINE
    Publication number: 20210292356
    Abstract: The present application relates to a method for preparing trifluridine, comprising reacting a compound of formula III with a compound of formula IV in a first solvent in the presence of an acid to obtain a compound of formula II, and performing further reaction to obtain trifluridine.
    Type: Application
    Filed: July 24, 2019
    Publication date: September 23, 2021
    Applicant: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Lin LIU, Rui ZHAO, Guangming SANG, Xingjian ZHOU, Xiaopeng GUO, Aiming ZHANG, Gang WU, Chunguang XIA, Xiquan ZHANG
  • Crystal of DPP-IV long-acting inhibitor and salt
    Patent number: 10822319
    Abstract: The present application relates to a crystal of a compound represented by Formula (I), a salt thereof, and a crystal of the salt thereof, a method for preparing the crystal of the compound represented by Formula (I), the salt thereof, and the crystal of the salt thereof, a crystal comprising the compound represented by Formula (I), a crystal composition comprising the crystal of the salt thereof, a pharmaceutical composition thereof, and medical uses thereof.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: November 3, 2020
    Assignees: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD., LIANYUNGANG RUNZHONG PHARMACEUTICAL CO., LTD., CENTAURUS BIOPHARMA CO., LTD.
    Inventors: Guangming Sang, Lin Liu, Aiming Zhang, Jiabin Qiao, Xiaopeng Guo, Xiquan Zhang, Chunguang Xia
  • CRYSTAL OF DPP-IV LONG-ACTING INHIBITOR AND SALT
    Publication number: 20190284153
    Abstract: The present application relates a crystal of a compound represented by Formula (I), a salt thereof, and a crystal of the salt thereof, a method for preparing the crystal of the compound represented by Formula (I), the salt thereof, and the crystal of the salt thereof, a crystal comprising the compound represented by Formula (I), a crystal composition comprising the crystal of the salt thereof, a pharmaceutical composition thereof, and medical uses thereof.
    Type: Application
    Filed: August 11, 2017
    Publication date: September 19, 2019
    Inventors: Guangming Sang, Lin Liu, Aiming Zhang, Jiabin Qiao, Xiaopeng Guo, Xiquan Zhang, Chunguang Xia