Process for the conversion of niddamycin to leucomycin a1, leucomycin a3, carbomycin b and other antibiotics and related 3-(0)-esters
CA 1048019 A · Owner: Abbott Laboratories · Inventors: Freiberg, Leslie A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Covers the process for the conversion of niddamycin to known compounds such as carbomycin B leucomycin A1, and A3, and other antibiotic compounds as well as novel related 3-(O)-esters and dimethyl acetal derivatives not obtained from natural sources. These compounds are represented by the general formula:, wherein R is hydroxy or oxygen R1 is hydrogen, HCO (formyl), CH3CO (acetyl) CH3CH2CO (propionyl) or CH3CH2CH2CO (butyryl); wherein R2 is hydrogen or equivalent to R1 and R3 is CHO or CH(OCH3)2. These compounds are useful antimicrobial agents. -1-
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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 February 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 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
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.