Process for preparing 7-aminocephalosporanic acid derivatives
CA 1069120 A · Owner: Asahi Kasei Kogyo Kabushiki Kaisha · Inventors: Murakami, Masahiro; Sowa, Tsuneo; Suzuki, Nobuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR PREPARING, 7-AMINOCEPHALOSPORANIC ACID DERIVATIVES ABSTRACT OF THE DISCLOSURE, 7-Aminocephalosporanic acid derivatives represented by the general formula (III) (III), wherein X is hydrogen, hydroxyl acetoxy or a, nucleophilic residue, which are useful as a starting material for the synthesis of cephalosporin type antibiotics low in toxicity and broad in pharmacological effect can be easily prepared by allowing to react cephalosporin C or its derivative represented by the general formula (I), (I), wherein X is as defined above or a salt thereof with, an .alpha.-keto derivative represented by the general formula (II), (II) . wherein R1 is carboxyl aroyl or amide when R2 is, …
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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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- 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
Timeline From CIPO dates
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.