.beta.-lactams and their production
CA 1313380 C · Owner: Sumitomo Pharmaceuticals Co. Ltd. · Inventors: Goda, Koshiro; Sunagawa, Makoto; Sasaki, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, The present invention is directed to beta-lactam compounds of the formula:, (I), 2 R4, wherein R1 and R2 are the same or different and each represent a hydrogen atom or a lower alkyl group R3 is a, lower alkyl group, R4 is a hydrogen atom a carboxyl-, protecting group or a thiolcarboxyl-protecting group X is, a hydrogen atom, a hydroxyl group or a protected hydroxyl group, Y is an oxygen atom or a sulfur atom and COZ is a carboxyl group, an activated or protected carboxyl group a, thiolcarboxyl group or an activated or protected thiolcarboxyl group. The compounds are useful as intermediates in the stereospecific production of 1-alkylcarbapenem 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 February 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2010.
- 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.