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. 01, 2026
Filed:
Aug. 27, 2021
Nippon Chemiphar Co., Ltd., Tokyo, JP;
Masaaki Hirose, Saitama, JP;
NIPPON CHEMIPHAR CO., LTD., Tokyo, JP;
Abstract
Provided is a method which is for preparing a morphinan derivative having a diaryl ether skeleton represented by general formula (III) (In the formula, Rrepresents a hydrogen atom, etc., R, R, and Rare the same or different and each represent a hydrogen atom, or an arbitrary substituent, etc., Rrepresent a hydrogen atom, a hydroxy group, etc., Rand Rare the same or different and each represent a hydrogen atom, or an arbitrary substituent, etc.), and in which a phenyl group is introduced into the 4-position phenol of a morphinan derivative through the Ullmann reaction of a system using a monovalent copper compound or a novel catalytic system simultaneously using a monovalent copper compound and zero-valent metallic copper.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile