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:
Mar. 12, 2013
Filed:
Mar. 09, 2007
Shoichi Kondo, Funabashi, JP;
Kowichiro Saruhashi, Funabashi, JP;
Hisayuki Watanabe, Funabashi, JP;
Tsutomu Katsuki, Fukuoka, JP;
Shoichi Kondo, Funabashi, JP;
Kowichiro Saruhashi, Funabashi, JP;
Hisayuki Watanabe, Funabashi, JP;
Tsutomu Katsuki, Fukuoka, JP;
Nissan Chemical Industries, Ltd., Tokyo, JP;
Abstract
[PROBLEMS] To provide an efficient process for producing an optically active chromene oxide compound which is an important intermediate for a benzopyran compound effective in the treatment of arrhythmia. [MEANS FOR SOLVING PROBLEMS] The process for producing an optically active chromene oxide compound comprises using an optically active titanium complex represented by, e.g., the formula (1) or (2) as a catalyst to asymmetrically oxidize an optically active chromene compound with high enantioselectivity in high chemical yield.