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:
Jan. 13, 1981
Filed:
Jan. 25, 1979
Applicant:
Inventors:
Roger J Ponsford, Horsham, GB;
Robert Southgate, Warnham, Nr. Horsham, GB;
Assignee:
Beecham Group Limited, , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544 71 ; 2602 / ; 544 90 ; 544162 ; 544175 ; 424244 ;
Abstract
Compounds of the formula (III): ##STR1## wherein R.sub.1 is alkyl of up to 3 carbon atoms and R.sub.2 is alkyl of up to 3 carbon atoms optionally joined to R.sub.1 so that R.sub.1 and R.sub.2 and the carbon atom to which they are attached form a spiro-cyclopentyl or spiro-cyclohexyl ring, and wherein the configuration about the .beta.-lactam ring is trans, are useful in the preparation of antibacterial .beta.-lactam compounds. A process for the preparation of the compounds of the formula (III), is also desired.