Process for the preparation of cephalosporins
CA 1060433 A · Owner: Societa' Farmaceutici Italia S.P.A. · Inventors: Cainelli, Gianfranco; Masi, Paolo; Foglio, Maurizio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for preparing cephalosporins of the structure:, I, wherein R is selected from the class consisting of hydrogen alkyl having from 1 to 4 carbon atoms, t-butoxy,benzyloxy cyano-methyl, thienyl-methyl, furyl-methyl naphthyl-methyl, phenyl-methyl, phenoxy-methyl phenoxy-isopropyl, pyridyl-4-, thiomethyl and tetrazolyl-1-methyl; R1 is selected from the class consisting of hydroxyl, alkoxy with 1 to 4 carbon atoms benzyloxy, p-methoxy-benzyloxy, p-nitro-benzyloxy benzhydryloxy, triphenylmethoxy, phenacyloxy p-halophenacyloxy and tri-, chloroethoxy; Z is selected from the class consisting of hydrogen hydroxyl, -O-CO-alkyl, -O-alkyl, -Br, -I -Cl, -N3, -NH2, -O-CO-CH3, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 14, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 14, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.