Patents by Inventor Xixuan ZHANG

Xixuan 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).

  • METHOD OF PREPARATION FOR LEDIPASVIR AND DERIVATIVE THEREOF, AND INTERMEDIATE COMPOUND FOR PREPARATION OF LEDIPASVIR
    Publication number: 20180079744
    Abstract: Methods of preparing Ledipasvir and derivatives thereof, and intermediate compounds used in the preparation of Ledipasvir are provided. Specifically, a method for preparing the compounds of formula 1 and a series of preparation methods of preparing Ledipasvir are provided. The methods described herein are simple and efficient, and have better application prospects.
    Type: Application
    Filed: March 2, 2016
    Publication date: March 22, 2018
    Inventors: Chengjun HUANG, Gang FU, Shaojun FU, Zhewen WEI, Wei LI, Xixuan ZHANG