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. 06, 1994
Filed:
Jun. 22, 1993
Kazutaka Nagashima, Yokkaichi, JP;
Satoji Takahashi, Yokkaichi, JP;
Ajinomoto Co., Inc., Tokyo, JP;
Abstract
The methyl ester of .alpha.-L-aspartyl-L-phenylalanine may be obtained in high yields directly from a reaction solution which contains N-protected- or unprotected-.alpha.-L-aspartyl-D-phenylalanine (or its methyl ester derivative), and .alpha.-L-aspartyl-L-phenylalanine methyl ester by selective crystallization of the .alpha.-L-aspartyl-L-phenylalanine methyl ester hydrochloride from an aqueous solution containing N-protected- or unprotected-L-aspartyl-L-phenylalanine and/or its methyl ester derivative and N-protected- or unprotected-L-aspartyl-D-phenylalanine and/or its methyl ester derivative, hydrochloric acid, and methanol, with or without stirring.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile