.beta.-lactam compound and preparing thereof
CA 1269388 C · Owner: Kan, Kazunori · Inventors: Miyama, Akimasa; Watanabe, Kiyoshi; Ohashi, Takehisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to .beta.-lactam compound having the general formula (I): (I), wherein R1 is a protective group for hydroxy group R2, R3 and R4 are selected from a lower alkyl group of C1 to C4, phenyl group and aralkyl group and a process for preparing thereof which comprises reacting enolsilylether having the general forumal (III):, (III) wherein R1, R2, R3 and R4 are as above with, chlorosulfonylisocyanate and then reducing the obtained product. .beta.-Lactam compound of the present invention is a useful intermediate for preparing carbapenem .beta.-lactam compound.
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 May 22, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 2007.
- 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.