Patents by Inventor Qingchun Ni

Qingchun Ni 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).

  • Optically active compound of prulifloxacin for treating infection and preparation method thereof
    Patent number: 8501741
    Abstract: Anti-infection levorotatory optically active compound (S-configuration) of prulifloxacin represented by the following formula (1) and preparation method thereof are disclosed. Said method utilizes levorotatory ulifloxacin as the raw material and the reaction is conducted in organic solvent in the presence of alkaline materials, wherein the reaction temperature is ?20° C.˜60° C. and the reaction time is 15 minutes to 24 hours.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: August 6, 2013
    Assignee: Hainan Hualon Pharmaceutical Co., Ltd.
    Inventors: Jun Ying, Feng Peng, Yuping Wang, Suiwei An, Jinqiang Liang, Beimei Liang, Qingchun Ni, Cheng Luo
  • OPTICALLY ACTIVE COMPOUND OF PRULIFLOXACIN FOR TREATING INFECTION AND PREPARATION METHOD THEREOF
    Publication number: 20120302580
    Abstract: Anti-infection levorotatory optically active compound (S-configuration) of prulifloxacin represented by the following formula (1) and preparation method thereof are disclosed. Said method utilizes levorotatory ulifloxacin as the raw material and the reaction is conducted in organic solvent in the presence of alkaline materials, wherein the reaction temperature is ?20° C.˜60° C. and the reaction time is 15 minutes to 24 hours.
    Type: Application
    Filed: October 22, 2010
    Publication date: November 29, 2012
    Inventors: Jun Ying, Feng Peng, Yuping Wang, Suiwei An, Jinqiang Liang, Beimei Liang, Qingchun Ni, Cheng Luo
  • Trans-cinnamic acid derivative, its preparation mathod and the use
    Publication number: 20110028758
    Abstract: A compound of formula (I) or its pharmaceutically acceptable salt is prepared by ring opening of osthol under basic condition. The compound of formula (I) or its pharmaceutically acceptable salt has activity of selectively inhibiting tumor cells and lower toxicity, and can be used for preparing anti-tumor drugs.
    Type: Application
    Filed: June 4, 2008
    Publication date: February 3, 2011
    Inventors: Wei Wang, Jun Ying, Wenzhan Chen, Xuebin Liu, Kui Xu, Qingchun Ni