Heteroarylcarboxamide derivatives, process for preparing the same and pharmaceutical composition containing the same
CA 1322752 C · Owner: Nakamura, Hideo · Inventors: Uno, Hitoshi; Nakamura, Hideo; Kon, Tatsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, Heteroarylcarboxamide derivatives of the formula (I):, (I), wherein A is an alkylene group X is?NCHPh2 or?C=CPh2, in which Ph is phenyl and is a group of the formula:, or , in which Y is a nitrogen atom or =CH- R1 is hydroxy or, mercapto, R2 is a hydrogen atom a halogen atom, hydroxy, a lower alkyl group a lower alkoxy group, nitro, or cyano, R3 is a lower alkyl group provided that R2, is attached at the 7-position when Y is a nitrogen atom or physiologically acceptable salts thereof a process for, preparing the same and a pharmaceutical composition containing the same as an active ingredient. The compounds of the present invention and salts thereof show excellent antiallergic …
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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 October 5, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 5, 2010.
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