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. 13, 1976
Filed:
Oct. 29, 1973
Applicant:
Inventors:
Kentaro Tamaki, Sakai, JA;
Kyoichi Fujii, Sakai, JA;
Seiichi Yada, Sakai, JA;
Shiro Kudo, Tokyo, JA;
Assignee:
Kyowa Hakko Kogyo Co., Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260574 ; 26029354 ; 2602 / ; 2602 / ; 2602 / ; 2603409 ; 2604 / ; 26050118 ; 2605706 ; 260571 ; 260575 ;
Abstract
6,7-Benzomorphan derivatives, which are useful as unaddictive analgesics, are prepared from aromatic aminoketones through several steps of reactions. Most of the intermediates are new compounds. Process for preparing 2-benzyl-1,2,5,6-tetrahydropyridine derivatives which are known as intermediates for the preparation of 6,7-benzomorphan derivatives is also disclosed.