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. 30, 1978
Filed:
Dec. 03, 1975
Shionogi & Co., Ltd., Osaka, JA;
Abstract
Antibacterial cephalosporins of the formula ##STR1## wherein Acyl is an acyl group; R is a hydrogen or methoxy, R.sup.1 is a hydrocarbyl group containing 1 to 8 carbon atoms; R.sup.2 is a hydrogen, alkali metal, alkaline earth metal, halo-alkaline earth metal group or acyl group containing 1 to 12 carbon atoms; R.sup.3 is a hydrogen, pharmaceutically acceptable cation, or ester residue; or when R.sup.2 and R.sup.3 are both hydrogens, they can be combined to form a lactone ring; the broken line shows a double bond at position 2 or 3; and n is zero or one, and processes for preparing them by the reaction of the compound shown by above formula in which R.sup.1 and R.sup.2 combined to show a bond, with a Grignard type or organometallic reagent to introduce R.sup.1, followed by acylation, oxidation, reduction, double bond migration, or other reactions.