Process for preparing penems
CA 1300539 C · Owner: Foa', Marco · Inventors: Marchi, Marcello; Cambiaghi, Stefano; Foa', Marco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR PREPARING PENEMS" Compounds of the formula I :, (I), wherein R1 represents a hydroxy protecting group and R2 represents a carboxy protecting group, useful as intermediates for the preparation of penem antibiotics are, prepared by hydrolysing a compound of the formula II : (II), wherein R1 and R2 are as defined above and R represents an alkyl, alkenyl or phenylalkyl group having from 1 to 18 carbon atoms, by means of an enzyme capable of selectively hydrolysing the ester group of the 2-substituent thereof.
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 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 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.