Patents Assigned to Suzhou Tongli Biomedical Co., Ltd.
  • R-praziquantel preparation method
    Patent number: 9175321
    Abstract: Provided are R-praziquantel preparation methods, which utilize the characteristics of biological enzyme of strong stereoselectivity, site-selectivity, and regioselectivity, of high resolution efficiency, of mild reaction conditions, and of simple operations to catalyze the hydrolysis of a certain enantiomer in a chemically synthesized racemate or a derivative, thus acquiring a mixture of reacted and unreacted optical isomers. R-praziquantel prepared by the method can have a purity of 98% or more.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: November 3, 2015
    Assignee: SUZHOU TONGLI BIOMEDICAL CO., LTD
    Inventor: Mingxin Qian
  • R-PRAZIQUANTEL PREPARATION METHOD
    Publication number: 20140256003
    Abstract: Provided are R-praziquantel preparation methods, which utilize the characteristics of biological enzyme of strong stereoselectivity, site-selectivity, and regioselectivity, of high resolution efficiency, of mild reaction conditions, and of simple operations to catalyze the hydrolysis of a certain enantiomer in a chemically synthesized racemate or a derivative, thus acquiring a mixture of reacted and unreacted optical isomers. R-praziquantel prepared by the method can have a purity of 98% or more.
    Type: Application
    Filed: October 26, 2012
    Publication date: September 11, 2014
    Applicant: Suzhou Tongli Biomedical Co., Ltd.
    Inventor: Mingxin Qian