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:
Jul. 04, 2006
Filed:
Mar. 19, 2002
Akira Matsumoto, Iruma-gun, JP;
Michio Nomura, Kakogawa, JP;
Yoshikazu Kogame, Himeji, JP;
Yasuyoshi Ueda, Himeji, JP;
Akira Matsumoto, Iruma-gun, JP;
Michio Nomura, Kakogawa, JP;
Yoshikazu Kogame, Himeji, JP;
Yasuyoshi Ueda, Himeji, JP;
Kanaka Corporation, Osaka, JP;
Abstract
The present invention is to provide a purification method of obtaining N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanine of high quality in good yield with high productivity, which is accordingly suited for commercial scale application. An impurity-contaminated N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanine is crystallized from a mixed solvent of alcohol and water in a volume ratio of alcohol/water being 1 to 20 to remove a contaminating impurity into a mother liquor and give crystals of N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanine.