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. 04, 2019
Filed:
Dec. 25, 2015
The University of Tokyo, Tokyo, JP;
Towa Pharmaceutical Co., Ltd., Osaka, JP;
Eiichi Nakamura, Tokyo, JP;
Laurean Ilies, Tokyo, JP;
Yoji Oderaotoshi, Osaka, JP;
Takuhiro Izumi, Osaka, JP;
Shigenobu Nishiguchi, Osaka, JP;
THE UNIVERSITY OF TOKYO, Tokyo, JP;
Abstract
A highly pure optically active proton pump inhibitor compound can be produced safely and inexpensively in a high yield and enantioselectivity by a method of producing an optically active sulfoxide of Formula 2 or a salt thereof, comprising oxidizing a sulfide of Formula 1 or a salt thereof with hydrogen peroxide using an iron salt in the presence of a chiral ligand of Formula 3; wherein A is CH or N; Ris hydrogen atom, an alkyl optionally substituted by halogen(s), or an alkoxy optionally substituted by halogen(s); one to three Rmay exist, and each of Ris independently an alkyl, a dialkylamino, or an alkoxy optionally substituted by halogen(s) or alkoxy(s); each of Ris independently hydrogen atom, a halogen, cyano or the like; Ris a tertiary alkyl; and * and ** represent respectively R configuration or S configuration.