- Substituted alkanoic acids and derivatives
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Substituted alkanoic acids and derivatives thereof of the formula: SPC1 Wherein each of X1 and X2 is a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; each of R1 and R2 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; A is a carbonyl group, a methylene group or an alkylidene group having 2 to 4 carbon atoms; Y is --O--, --S-- or --N(R)-- [wherein R is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms]; Z is OH or Q--B--N(R3)(R4) [wherein Q is O (oxygen atom) or NH, B is an alkylene group having 1 to 4 carbon atoms and each of R3 and R4 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, or R3 and R4 together with the adjacent nitrogen atom form a saturated heterocycle selected from the group consisting of pyrrolidine, piperidine, morpholine, piperazine and piperazine substituted by an alkyl group having 1 to 4 carbon atoms at the 4-position]; and ring P represents a pyridine or a pyridine N-oxide ring; and pharmaceutically acceptable salts thereof are useful as antirheumatics, analgesics, antipyretics and anti-inflammatory agents.
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