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. 10, 1990
Filed:
Aug. 08, 1986
Stephen C Finch, Betchworth, GB;
Michael J Pearson, Betchworth, GB;
Beecham Group p.l.c., , GB;
Abstract
.beta.-Lactam antibiotics are disclosed which have the formulae (Ia) or pharmaceutically acceptable salts or pharmaceutically acceptable in vivo hydrolysable esters thereof: ##STR1## wherein R.sup.1 is phenyl, substituted phenyl, cyclohexenyl, cyclohexadienyl, or an optionally substituted 5- or 6-membered heterocyclic ring containing up to three hetero-atoms selected from oxygen, sulphur or nitrogen; R.sup.2 is hydrogen or optionally substituted C.sub.1-6 alkyl; R.sup.3 is an optionally substituted 5- or 6- membered heterocyclic group containing one or two nitrogen heteroatoms; or R.sup.2 and R.sup.3 together with the nitrogen atom to which they are attached form an optionally substituted 5- or 6- membered heterocyclic group contaning one or two nitrogen heteroatoms; R.sup.4 is a substituted pyridinium group; and CO.sub.2 R is carboxy or a carboxylate anion; and also the use thereof. Processes for the preparation of the compounds are disclosed together with intermediates for use therein.