Process and intermediates for a .beta.3-adrenergic receptor agonist
CA 2285914 C · Owner: Vanderplas, Brian Clement · Inventors: Raggon, Jeffrey William; Urban, Frank John; Devries, Keith Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The instant invention relates to intermediates of Formula II (see above formula II), wherein R1, R2 and R3 are as defined in the specification and to processes , for, preparing such intermediates. This invention also relates to processes for preparing, compounds of Formula III, (see above formula III) and enantiomers thereof, wherein R2, R3 and R4 are as defined in the specification. Compounds of Formula II and Formula III are intermediates in the preparation of a, potent .beta.3 adrenergic receptor agonist. The instant invention also relates to, processes for preparing the .beta.3 adrenergic receptor agonist using the compounds of, Formula II and Formula III.
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
- Filed October 13, 1999 and granted June 3, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2021.
- 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.