Preparation of a piperidinylclopentylheptenoic acid derivative
CA 1312609 C · Owner: Mills, Keith · Inventors: Mills, Keith
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Preparation of a piperidinylcyclopentylheptenoic acid derivative A process is described for the preparation of a compound of formula (1), (1), or a salt thereof, which comprises reacting a compound of formula (2) (2), (where A is a displaceable atom or group and R is a hydrogen atom or a C1-6alkyl or C7-20aralkyl protecting group) or a salt thereof to, replace the moiety A with a phenyl group followed where necessary by, removal of a C1-6alkyl or C7-20aralkyl protecting group and/or by salt formation. The replacement of A in formula (2) by a phenyl group may be effected with a compound PhX (3) wherein Ph represents phenyl and X is an atom or group as defined for A in formula (2) or X is a …
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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 12, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 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.