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:
May. 14, 1985
Filed:
Nov. 14, 1983
Nigel J Broom, Reigate, GB;
Beecham Group Limited, , GB;
Abstract
The present invention provides a process for the preparation of a compound of the formula (IV): ##STR1## or salt or ester thereof wherein R.sup.1 and R.sup.2 are independently hydrogen; an organic radical bonded via a carbon atom to the ring carbon atom; a free, etherified or esterified hydroxy or mercapto group; an amino or acylamino group; or together R.sup.1 and R.sup.2 represent a group .dbd.CR.sup.5 R.sup.6 wherein R.sup.5 and R.sup.6 are the same or different and each represent hydrogen or a hydrocarbon or heterocyclic group optionally substituted with a functional group; and R.sup.3 represents an organic radical; which process comprises reacting a compound of the formula (V): ##STR2## wherein R.sup.x is hydrogen or a blocking group and R.sup.4 is an organic radical; with a thiol or reactive derivative thereof. The compounds of the formula (IV) are useful as antibiotics and .beta.-lactamase inhibitors, as are the compounds of the formula (V). This invention also provides the novel compounds of the formula (V) and certain novel compounds within formula (IV). Their preparation and use are described.