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. 25, 2025
Filed:
May. 13, 2020
Applicant:
Eisai R&d Management Co., Ltd., Tokyo, JP;
Inventors:
Taichi Abe, Kamisu, JP;
Kazuhiro Yoshizawa, Kamisu, JP;
Yuzo Watanabe, Kamisu, JP;
Takeshi Miura, Kamisu, JP;
Yusuke Ayata, Kamisu, JP;
Yoshinori Yasuda, Kamisu, JP;
Assignee:
Eisai R&D Management Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 401/12 (2006.01); C07C 41/09 (2006.01); C07D 239/34 (2006.01);
U.S. Cl.
CPC ...
C07D 401/12 (2013.01); C07C 41/09 (2013.01); C07D 239/34 (2013.01);
Abstract
The present application discloses a method and a compound that are useful for preparation of a compound of Formula (XI). Furthermore, the present application discloses the compound of Formula (XI) comprising a small amount of impurities.