Phosphorane intermediates for use in preparing penem antibiotics
CA 1268183 C · Owner: Bristol-Myers Squibb Company · Inventors: Menard, Marcel; Martel, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to phosphorane compounds of the formula, wherein Y is hydrogen, ethyl or hydroxyethyl Q is phenyl, or (lower) alkyl, R" is an easily removable ester group and X represents certain organic substituents. Also included in the invention are pharmaceutically acceptable salts of the above compounds and derivatives of the above compounds in which the carboxyl group at the 3- position is protected by an easily removable ester protecting group. The compounds of the present invention are of use as intermediates in the preparation of penem compounds having potent antibacterial activity.
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 April 25, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 25, 2007.
- 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.