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:
Jun. 29, 2021
Filed:
Sep. 25, 2018
Applicant:
Launch-pharma Technologies, Ltd., Guangzhou, CN;
Inventors:
Yehua Jin, Guangzhou, CN;
Fayang Qiu, Guangzhou, CN;
Hua Xu, Guangzhou, CN;
Fang Wang, Guangzhou, CN;
Assignee:
Launch-Pharma Technologies, Ltd., Guangdong, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 303/14 (2006.01); C07D 303/32 (2006.01); C07C 49/537 (2006.01); C07C 49/403 (2006.01); C07D 473/18 (2006.01);
U.S. Cl.
CPC ...
C07D 303/14 (2013.01); C07C 49/403 (2013.01); C07C 49/537 (2013.01); C07D 303/32 (2013.01); C07D 473/18 (2013.01);
Abstract
The disclosure relates to an entecavir intermediate, a synthetic method therefor, and the synthetic method for entecavir by using the intermediate. According to the disclosure, the synthetic methods for entecavir and the intermediate thereof have the advantages of being controllable in chirality, high in yield and product purity, wide in source of raw materials, cheap and available in reagents, simple in reactions, convenient to operate, environmentally friendly, and suitable for industrial amplification production.