Chiral compounds useful for the preparation of hetero prostaglandin derivatives
CA 1180339 A · Owner: Sanofi · Inventors: Cier, Andre; Cleophax, Jeanine; Gero, Stephan
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 cyclopentene derivatives represented by the general formula: Ia, in which R represents a hydroxy-protecting group of the formula -CH2R1 in which R1 represents an aryl or aralkyl radical, B represents , and A in such that: - when B represents , A represents , - when B represents A represents , . A process is also provided for the preparation of the above derivatives. The above derivatives may be used for the preparation of hetero-prostaglandin derivatives.
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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 January 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 2002.
- 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.