Patents by Inventor Fengsen ZHANG

Fengsen 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).

  • Compound and use thereof in synthesis of brivaracetam intermediate and crude drug
    Patent number: 11247977
    Abstract: The present application provides a compound in formula III, and further provides a use of the compound in the synthesis of a Brivaracetam intermediate and a crude drug, and a synthesis method. A raw material involved in the method of the present application is low in costs and easily available; (R)-4-propyl-dihydrofuran-2-ketone having high optical purity can be prepared; complicated separation and purification steps are avoided; costs are reduced, and the method is more applicable to industrial production.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: February 15, 2022
    Assignee: FUJIAN HAIXI PHARMACEUTICALS CO., LTD.
    Inventors: Yan Feng, Ruyong Wang, Yizhang Ye, Fengsen Zhang, Xuan Gong, Zhonghong Wang, Xinshan Kang
  • COMPOUND AND USE THEREOF IN SYNTHESIS OF BRIVARACETAM INTERMEDIATE AND CRUDE DRUG
    Publication number: 20210261515
    Abstract: The present application provides a compound in formula III, and further provides a use of the compound in the synthesis of a Brivaracetam intermediate and a crude drug, and a synthesis method. A raw material involved in the method of the present application is low in costs and easily available; (R)-4-propyl-dihydrofuran-2-ketone having high optical purity can be prepared; complicated separation and purification steps are avoided; costs are reduced, and the method is more applicable to industrial production.
    Type: Application
    Filed: June 20, 2019
    Publication date: August 26, 2021
    Applicant: FUJIAN HAIXI PHARMACEUTICALS CO., LTD
    Inventors: Yan FENG, Ruyong WANG, Yizhang YE, Fengsen ZHANG, Xuan GONG, Zhonghong WANG, Xinshan KANG