Patents by Inventor Lanfang Liu

Lanfang 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).

  • Process for the synthesis of etoricoxib
    Patent number: 9024030
    Abstract: The present invention relates to a process for the synthesis of the anti-inflammatory agent 5-chloro-3-(4-methanesulfonylphenyl)-6?-methyl-[2,3?]bipyridine, referred to as compound of formula (1) or etoricoxib, which is a pharmaceutically active ingredient inhibiting cyclooxygenase-2. In particular, the application concerns a novel process of making the compound of formula (1) by oxidizing a compound of formula (4).
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: May 5, 2015
    Assignees: Alfred E. Tiefenbacher (GmbH & Co. KG), Shanghai Golden Pharmatech Co. Ltd.
    Inventors: Zhenmin Mao, Tian Lan, Lanfang Liu, Long Yan, Stefan Becker
  • PROCESS FOR THE SYNTHESIS OF ETORICOXIB
    Publication number: 20150011771
    Abstract: The present invention relates to a process for the synthesis of the anti-inflammatory agent 5-chloro-3-(4-methanesulfonylphenyl)-6?-methyl-[2,3?]bipyridine, referred to as compound of formula (1) or etoricoxib, which is a pharmaceutically active ingredient inhibiting cyclooxygenase-2. In particular, the application concerns a novel process of making the compound of formula (1) by oxidizing a compound of formula (4).
    Type: Application
    Filed: January 11, 2013
    Publication date: January 8, 2015
    Inventors: Zhenmin Mao, Tian Lan, Lanfang Liu, Long Yan, Stefan Becker