Substituted indazole compounds useful as intermediates
CA 2389918 A1 · Owner: Pfizer Inc. · Inventors: Marfat, Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are novel 1H-indazole compounds of the formula:, (see formula I), wherein R is H alkyl, cycloalkyl(alkyl), alkoxyalkyl, alkenyl heterocyclyl(alkyl) or -(Z')b(Z")c aryl in which Z' is alkylene or alkenylene, Z" is O, S, SO2 or NR9 b and c, are each 0 or 1, R1 is H, alkyl alkenyl, phenyl or, cycloalkyl(alkyl), R9 is H or alkyl and X is Br alkoxycarbonyl, cyanomethyl, carboxyl, hydroxymethyl or formyl. The compounds are useful as intermediates for producing selective inhibitors of phosphodiesterase (PDE) type IV and tumor necrosis factor (TNF).
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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
- Filed April 1, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2019.
- 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
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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.