Patents by Inventor Junshan LUO

Junshan LUO 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).

  • Publication number: 20230331699
    Abstract: A preparation method for a CDK4/6 inhibitor for a compound of formula (I): 5-fluoro-4-(3-isopropyl-2-methyl-2H-indazol-5-yl)-N-(5-(piperazin-1-yl)pyrazol-2-yl)pyrimidine-2-amine. The preparation method has cheap and readily available starting materials and reagents, greatly simplified total reaction steps, shortened reaction time, improved total yield and a high purity of the key intermediate and final product, being suitable for industrial production.
    Type: Application
    Filed: June 21, 2021
    Publication date: October 19, 2023
    Applicant: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Guofeng LIU, Yong WANG, Meng GUO, Xiquan ZHANG, Kaizhen SONG, Jinhu LIU, Junshan LUO