Patents by Inventor Linyu Pan

Linyu Pan 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).

  • 4-benzyl-1-phenethyl-piperazine-2,6-dione preparation method, and intermediate and preparation method thereof
    Patent number: 9527804
    Abstract: The present invention provides a key new intermediate (a compound of formula III) of 4-benzyl-1-phenethyl-piperazine-2,6-dione (formula IV compound), a pharmaceutically acceptable salt thereof and a preparation method thereof. The present invention additionally discloses a method for preparing 4-benzyl-1-phenethyl-piperazine-2,6-dione (formula IV compound) from the formula III compound, said method overcoming the shortcomings of current formula IV compound preparation methods, such as low production volumes, low purity, high energy consumption, high costs, and inability to achieve industrialized production, and provides a formula IV compound preparation method which is simple, economical, environmentally-friendly and easy to produce industrially; the reaction solvent of the method is easily recycled and the method can produce the formula IV compound at high production rates and with high purity.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: December 27, 2016
    Assignees: Zhejiang Hisun Pharmaceutical Co., Ltd., Shanghai Institute of Pharmaceutical Industry
    Inventors: Fuli Zhang, Zhezhou Yang, Rusheng Bao, Pengcheng Qiu, Linyong Jin, Hu Pan, Linyu Pan, Dongming Jiang, Weiwei Xu
  • 4-BENZYL-1-PHENETHYL-PIPERAZINE-2,6-DIONE PREPARATION METHOD, AND INTERMEDIATE AND PREPARATION METHOD THEREOF
    Publication number: 20160130218
    Abstract: The present invention provides a key new intermediate (a compound of formula III) of 4-benzyl-1-phenethyl-piperazine-2,6-dione (formula IV compound), a pharmaceutically acceptable salt thereof and a preparation method thereof. The present invention additionally discloses a method for preparing 4-benzyl-1-phenethyl-piperazine-2,6-dione (formula IV compound) from the formula III compound, said method overcoming the shortcomings of current formula IV compound preparation methods, such as low production volumes, low purity, high energy consumption, high costs, and inability to achieve industrialized production, and provides a formula IV compound preparation method which is simple, economical, environmentally-friendly and easy to produce industrially; the reaction solvent of the method is easily recycled and the method can produce the formula IV compound at high production rates and with high purity.
    Type: Application
    Filed: June 23, 2014
    Publication date: May 12, 2016
    Applicants: Zhejiang Hisun Pharmaceutical Co., Ltd., Shanghai Institute of Pharmaceutical Industry
    Inventors: Fuli Zhang, Zhezhou Yang, Rusheng Bao, Pengcheng Qiu, Linyong Jin, Hu Pan, Linyu Pan, Dongming Jiang, Weiwei Xu