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:
Jun. 30, 1992
Filed:
Jan. 04, 1991
Applicant:
Inventors:
Frank Brown, Jr, Indianapolis, IN (US);
Francis O Ginah, Indianapolis, IN (US);
Leonard L Winneroski, Jr, Indianapolis, IN (US);
Assignee:
Eli Lilly and Company, Indianapolis, IN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540230 ; 540215 ; 540222 ;
Abstract
3-Exomethylenecepham sulfoxide esters are obtained in improved yields via cyclization of 3-methyl-2-(4-chlorosulfinyl-2-oxo-3-amino-1-azetidinyl)-3-butenoic acid esters under anhydrous conditions with a Lewis acid-type Friedel-Crafts catalyst in the presence of a nitro compound, e.g., nitromethane, nitroethane, nitropropane or nitrobenzene.
Brown, Jr, Frank. (1992). Process for 3-exomethylenecepham sulfoxide esters (U.S. Patent No. 5126446). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5126446
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile