Patents by Inventor Qinbin LI

Qinbin LI 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).

  • Patent number: 11286238
    Abstract: The present disclosure discloses melatonin derivatives, a method thereof, and a use thereof. The method comprises: dissolving melatonin in a solvent, adding a catalyst while maintaining the solvent at 0° C. to obtain a first reaction solution, stirring the first reaction solution, adding reactants in the first reaction solution, continually stirring at room temperature or at refluxing reaction temperature until, when analyzing by thin layer chromatography, the first reaction solution is fully reacted, quenching the reaction with ice water, concentrating the first reaction solution to obtain a residue of the first reaction solution, and purifying the residue of the first reaction solution by column chromatography to obtain the melatonin derivatives.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: March 29, 2022
    Assignees: Xiamen Nuokangde Biological Technology Co., Ltd.
    Inventors: Yufei Li, Zhu Li, Yunpeng Tian, Jianghong Zhang, Qinbin Li, Xu Yan, Wanyun Li, Haiyang Wang, Ting Wu
  • Publication number: 20210323917
    Abstract: The present disclosure discloses melatonin derivatives, a method thereof, and a use thereof. The method comprises: dissolving melatonin in a solvent, adding a catalyst while maintaining the solvent at 0° C. to obtain a first reaction solution, stirring the first reaction solution, adding reactants in the first reaction solution, continually stirring at room temperature or at refluxing reaction temperature until, when analyzing by thin layer chromatography, the first reaction solution is fully reacted, quenching the reaction with ice water, concentrating the first reaction solution to obtain a residue of the first reaction solution, and purifying the residue of the first reaction solution by column chromatography to obtain the melatonin derivatives.
    Type: Application
    Filed: April 16, 2020
    Publication date: October 21, 2021
    Inventors: Yufei LI, Zhu LI, Yunpeng TIAN, Jianghong ZHANG, Qinbin LI, Xu YAN, Wanyun LI, Haiyang WANG, Ting WU