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:
Apr. 07, 2020
Filed:
Aug. 16, 2016
Applicant:
Pharmaresources (Shanghai) Co., Ltd., Shanghai, CN;
Inventors:
Ping Chen, Shanghai, CN;
Shaoping Peng, Shanghai, CN;
Yinqiang Li, Shanghai, CN;
Dafeng Li, Shanghai, CN;
Xuejun Dong, Shanghai, CN;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 263/26 (2006.01); C07D 307/33 (2006.01);
U.S. Cl.
CPC ...
C07D 263/26 (2013.01); C07D 307/33 (2013.01); Y02P 20/55 (2015.11);
Abstract
A novel process for the preparation of lactone derivatives, and intermediates thereof is described. The lactone derivatives are important precursors for the synthesis of anti-hepatitis C virus agents, including sofosbuvir.