23-oxo (keto) and 23-imino derivatives of ll-f28249 compounds
CA 1301164 C · Owner: American Cyanamid Company · Inventors: France, Donald John; Asato, Goro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
30,394-00, 23-OXO (KETO) AND 23-IMINO DERIVATIVES OF LL-F28249 COMPOUNDS, ABSTRACT OF THE INVENTION The present invention relates to novel 23-oxo (keto) and 23-imino derivatives of LL-F28249.alpha. .beta. ? .delta. .epsilon. 5, .theta. ? and .lambda. compounds. These LL-F28249 compounds (collectively) are isolates from the fermentation broth of Streptomyces cyaneogriseus subspecies noncyanogenus having deposit accession number NRRL 15773. The present 23-oxo compounds are prepared by selectively oxidizing suitably protected 23-hydroxy compounds of LL-F28249 components using oxidizing agents. Subsequently the, 23-oxo compounds are converted to the 23-imino compounds. These novel compounds …
Read the whole patent
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 May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
- 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.