Patents by Inventor Huafei SHEN

Huafei SHEN 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).

  • METHOD FOR SYNTHESIZING 1,7-NAPHTHYRIDINE DERIVATIVES
    Publication number: 20220235044
    Abstract: The invention discloses a method for synthesizing 1,7-naphthyridine derivatives, which relates to the technical field of synthesizing pharmaceutical intermediates and organic chemical intermediates, wherein the method includes: (1) 2-chloro-3-amino-pyridine being used as Compound I as a starting material, and protecting an amino group to prepare Compound II; (2) the Compound II reacting with an aldehydation reagent under alkaline conditions to obtain Compound III; (3) cyclizing the Compound III with acrylate compounds under the action of Lewis acid to prepare compound IV.
    Type: Application
    Filed: November 17, 2020
    Publication date: July 28, 2022
    Inventors: Wei QIAN, Yuhua SHI, Xing HUANG, Changming DONG, Junkui DANG, Zhipeng WANG, Yu FENG, Hong XU, Zongxi HUANG, Ye CHEN, Huafei SHEN, Jun ZHANG