Patents by Inventor Binlong LIU

Binlong LIU 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).

  • Preparation method for azoxystrobin and intermediate thereof
    Patent number: 11214552
    Abstract: The present invention relates to the preparation field of azoxystrobin, and discloses a preparation method for a compound represented by formula (I). The method comprises the following steps: (1) a compound represented by formula (II) is hydrolyzed in a solvent under acidic conditions to obtain a compound represented by formula (III); and (2) the compound represented by formula (III) is reacted with a base and a methylating agent to obtain the compound represented by formula (I); in the formula, R3 is hydrogen or C1-C4 alkyl, and R4 is C1-C4 alkyl. The process for preparing azoxystrobin of the present invention not only successfully replaces trimethyl orthoformate and reduces the raw material cost, but also has high total reaction yield, and is suitable for industrial large-scale production. Experiments have proven that the yield of the prepared azoxystrobin can reach 95%.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: January 4, 2022
    Assignee: PURPANA (BEIJING) TECHNOLOGIES CO., LTD
    Inventors: Binlong Liu, Ge Xu, Zhihui Wang
  • PREPARATION METHOD FOR AZOXYSTROBIN AND INTERMEDIATE THEREOF
    Publication number: 20210009532
    Abstract: The present invention relates to the preparation field of azoxystrobin, and discloses a preparation method for a compound represented by formula (I). The method comprises the following steps: (1) a compound represented by formula (II) is hydrolyzed in a solvent under acidic conditions to obtain a compound represented by formula (III); and (2) the compound represented by formula (III) is reacted with a base and a methylating agent to obtain the compound represented by formula (I); in the formula, R3 is hydrogen or C1-C4 alkyl, and R4 is C1-C4 alkyl. The process for preparing azoxystrobin of the present invention not only successfully replaces trimethyl orthoformate and reduces the raw material cost, but also has high total reaction yield, and is suitable for industrial large-scale production. Experiments have proven that the yield of the prepared azoxystrobin can reach 95%.
    Type: Application
    Filed: May 30, 2018
    Publication date: January 14, 2021
    Inventors: Binlong LIU, Xianjun ZHANG, Ge XU, Zhihui WANG