.beta.-LACTAM COMPOUND AND PROCESS FOR PREPARING THE SAME
CA 1260950 A · Owner: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha · Inventors: Watanabe, Kiyoshi; Sada, Isao; Ueyama, Noboru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A .beta.-lactam compound having the formula (I): (I), wherein R1, R2 and R3 are a member selected from the group consisting of a lower alkyl group having 1 to 6 carbon atoms, phenyl group and an aralkyl group a, process for preparing the same, which comprises reacting an enolsilylether having the formula (II): (II), wherein R1, R2 and R3 are as defined above with, chlorosulfonylisocyanate and then reducing the obtained product. The .beta.-lactam compound of the present invention is a useful intermediate for preparing carbapenem .beta.-lactam compound.
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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.