0-2-isocephem antibacterial agents
CA 1106374 A · Owner: Bristol-Myers Canada Limited · Inventors: Menard, Marcel; Lim, Gary M. F.; Conway, Terry T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
USSN 567,323, 0-2-Isocephem Ahtibacterial Agents Abstract of the Invention, There is described the stereoselective total synthesis of novel .DELTA.2,3 1,4-morpholine-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, I , wherein Z is halo hydroxyl, etherified hydroxyl or, hydroxyl esterified with a carboxylic acid residue or a sulfonic acid residue and X is amino azido or acyl-, amino. Also included in the invention are compounds of formula I in which the carboxyl group at the 2-position is protected as by an easily cleavable ester group and …
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 August 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 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
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.