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:
Dec. 13, 2011
Filed:
Sep. 03, 2007
Nobuto Minowa, Yokohama, JP;
Nozomu Nakanishi, Yokohama, JP;
Masaaki Mitomi, Yokohama, JP;
Hideki Nara, Hiratsuka, JP;
Tohru Yokozawa, Hiratsuka, JP;
Nobuto Minowa, Yokohama, JP;
Nozomu Nakanishi, Yokohama, JP;
Masaaki Mitomi, Yokohama, JP;
Hideki Nara, Hiratsuka, JP;
Tohru Yokozawa, Hiratsuka, JP;
Meiji Seika Pharma Co., Ltd., Tokyo, JP;
Takasago International Corporation, Tokyo, JP;
Abstract
The present invention is a process for producing optically active aminophosphinylbutanoic acids represented by the formula (2), comprising asymmetrically hydrogenating a compound represented by the formula (1) in the presence of a ruthenium-optically active phosphine complex, a process for the production thereof, and a compound useful in a herbicide such as L-AHPB that can be produced with good efficiency and high asymmetric yield.