2-aza-substituted 1-carbadethiapen-2-em-3-carboxylic acids
CA 1297110 C · Owner: Ratcliffe, Ronald W. · Inventors: Chabala, John C.; Ratcliffe, Ronald W.; Christensen, Burton G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are 2-aza-substituted 1-carbadethiapen-2-em-3-carboxylic acids I, where the generic 2-aza group includes azido, acylamino amino, alkylamino, dialkylamino, triazolyl triazolinyl, aziridinyl, and their pharmaceutically acceptable salt, ester, anhydride and amide derivatives which are useful as antibiotics. Also disclosed are processes for the preparation of I from the known appropriately substituted bicyclic keto ester II via the 2-azido central intermediate III:, 0725P/0905A 2802P/0747A 16349Y, II, III, wherein R16 is H or CH3 preferably beta-methyl;, R6, and R7 are independently hydrogen linear, branched or cyclic C1-C5alkyl, which can be substituted with fluoro, hydroxy, …
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 March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 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.