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. 27, 1983
Filed:
Nov. 19, 1981
Daniel Farge, Thiais, FR;
Pierre L Roy, Thiais, FR;
Claude Moutonnier, Le Plessis Robinson, FR;
Jean-Francois Peyronel, Palaiseau, FR;
Rhone-Poulenc Industries, Paris Cedex, FR;
Abstract
New 3-vinylcephalosporin derivatives of the general formula: ##STR1## in the form of a bicyclooct-2-ene or bicyclooct-3-ene, in which formula R.sub.5.sup.a and R.sub.5.sup.b are hydrogen atoms or alkyl radicals, or together form an alkyl radical containing 2 or 3 carbon atoms, R.sub.5.sup.c is an acid-protecting radical, R.sub.1 is an amino-protecting radical, R.sub.2 is an acid-protecting radical or a radical which can be removed by an enzymatic method, and R.sub.3 and R.sub.4, which are identical or different, represent alkyl (optionally substituted by hydroxyl, alkoxy, amino, alkylamino or dialkylamino) or phenyl, or together form, with the nitrogen atom, a saturated heterocyclic ring of 5 or 6 members, optionally containing another hetero-atom, their E and Z forms, and their syn and anti forms, and mixtures thereof, and also their preparation. These new compounds are useful as intermediates for the preparation of biologically active cephalosporins.