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. 31, 1991
Filed:
Feb. 07, 1991
Applicant:
Inventors:
Joseph E Sundeen, Yardley, PA (US);
Robert Zahler, Princeton, NJ (US);
Stefan Jendrzejewski, Sinzing, DE;
Assignee:
E. R. Squibb & Sons, Inc., Princeton, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C71 / ; C07D / ; C07D / ; C07D / ; C07D / ; A61K / ; A61K / ; A61K / ;
U.S. Cl.
CPC ...
562 47 ; 544224 ; 540553 ; 548356 ; 548951 ;
Abstract
Compounds having the formula ##STR1## and pharmaceutically acceptable salts thereof, wherein R.sub.3 and R.sub.4 are the same or different and each is hydrogen or alkyl or R.sub.3 and R.sub.4 taken together with the nitrogen atoms to which they are attached form a 1,2-diazacyclobutane, 1,2-diazacyclopentane, 1,2-diazacyclohexane, or 1,2-diazacycloheptane ring and Y, and Y.sub.2 are either hydrogen or hydroxy but are not the same; are useful chemical intermediates for the preparation of .beta.-lactam antibiotics.