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:
Sep. 19, 2023
Filed:
Feb. 11, 2020
Applicant:
Dracen Pharmaceuticals, Inc., New York, NY (US);
Inventors:
Jon Philip Lawson, Wildwood, MO (US);
Robert Christian Wild, Murrieta, CA (US);
Yiyang Shao, Beijing, CN;
Jinxiao Chu, Beijing, CN;
Jinchao Weng, Beijing, CN;
Pavel Majer, Sykesville, MD (US);
Assignee:
Dracen Pharmaceuticals, Inc., Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D 209/20 (2006.01); C07C 249/02 (2006.01); C07D 207/28 (2006.01);
U.S. Cl.
CPC ...
C07D 209/20 (2013.01); C07C 249/02 (2013.01); C07D 207/28 (2013.01); C07B 2200/13 (2013.01);
Abstract
The present disclosure provides a method of preparing a compound of Formula I, wherein Ris C-Calkyl; Ris C1-C4 alkyl; and Ris selected from the group consisting of C-Calkyl, (aryl)alkyl, and (heteroaryl)alkyl in >95% chemical purity and >95% enantiomeric excess.