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:
Feb. 07, 1989
Filed:
Aug. 27, 1987
Applicant:
Inventor:
Wolfgang Hartwig, Wuppertal, DE;
Assignees:
Bayer Aktiengesellschaft & Chinese, Leverkusen, DE;
Chinese Academy of Medical Sciences, Beijing, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548551 ;
Abstract
A process for the preparation of a C(3)-C(4)-transconfigurated.gamma.-butyrolactam of the formula (I) ##STR1## in which R.sup.1 represents hydrogen or alkyl, aryl or aralkyl with in each case up to 10 carbon atoms and