Cycloalkylidenemethylphenylacetic acid derivatives
CA 1113114 A · Owner: Sankyo Company, Limited · Inventors: Tanaka, Shigeru; Misaka, Eiichi; Terada, Atsusuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel cycloalkylidenemethylphenylacetic acid derivatives which are of the formula, (I), wherein R1 is alkyl having 1 to 6 carbon atoms; R2 is hydrogen or C1 to C6 alkyl and n is 1, 2 or 3 and pharmaceutically acceptable salts thereof are useful as anti-inflammatory analgesic, or anti-pyretic agents. The derivatives (1) may be prepared by condensing a compound, (II), (wherein R1 is as defined and R3 is C1 to C6 alkyl) with a compound (V), (wherein n is as defined) or an enamine derivative thereof. Control of the process conditions gives the desired compound wherein R2 is R3 or hydrogen.
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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 November 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 1998.
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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.