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:
Sep. 26, 1989
Filed:
Jul. 30, 1987
Applicant:
Inventors:
Hamao Umezawa, deceased, late of Tokyo, JP;
Takaaki Aoyagi, Kanagawa, JP;
Kuniaki Tatsuta, Tokyo, JP;
Takeshi Nakamura, Kanagawa, JP;
Shunzo Fukatsu, Tokyo, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562439 ; 549415 ; 560 25 ;
Abstract
Known compound, optically active arphamenine A can now be synthesized in an optically active pure form and in a favorable yield by a new process comprising consecutive steps with starting from L-arginine, wherein racemization of intermediate reaction products can be minimized.