MONOCYCLIC .beta.-LACTAMS AS INTERMEDIATES FOR THE PRODUCTION OF 0-2-ISOCEPHEM ANTIBACTERIAL AGENTS
CA 1110252 A · Owner: Bristol-Myers Canada Limited · Inventors: Luh, Bing Y.; Belleau, Bernard R.; Doyle, Terrence W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides for the stereoselective total synthesis of certain novel substituted .DELTA. 2,3-1,4morpholine-2-carboxylic acids possessing a fused .beta.-lactam ring in the 1,6-position and carrying a substituent cis to carbon 5 in the 7-position of the fused ring system represented by the general formula, wherein Q is hydrogen alkyl, aralkyl or -CH2COOZ where Z, is hydrogen or the residue of an ester group and X is azido amino or acylamino. When X is acylamino these acids (and, their pharmaceutically acceptable salts and physiologically hydrolyzed esters) are potent antibacterial agents. This divisional is directed to enol intermediate products used in the above …
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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 October 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 1998.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.