The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 2015
Filed:
Oct. 26, 2012
Applicant:
Suzhou Tongli Biomedical Co., Ltd, Jiangsu, CN;
Inventor:
Mingxin Qian, Jiangsu, CN;
Assignee:
SUZHOU TONGLI BIOMEDICAL CO., LTD, Jiangsu, CN;
Primary Examiner:
Int. Cl.
CPC ...
C12P 17/12 (2006.01); C12P 17/18 (2006.01); C07D 471/04 (2006.01); C12P 41/00 (2006.01); C07D 217/12 (2006.01);
U.S. Cl.
CPC ...
C12P 17/182 (2013.01); C07D 217/12 (2013.01); C07D 471/04 (2013.01); C12P 17/12 (2013.01); C12P 41/00 (2013.01);
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.