Abstract: The invention relates to indolyl piperidinyl derivatives of formula (I) wherein: A1 represents an alkylene, alkyleneoxy, alkylenethio, alkanoylene or hydroxyalkylene group; A2 represents an alkylene, alkyleneoxy, alkylenethio, alkanoylene or an alkyleneoxyalkylene group; W1 represents a phenylene, furanylene or pyridinylene group which is unsubstituted or substituted by one or more halogen atoms, alkoxy groups and/or alkyl groups; W2 represents a 3-10 membered monocyclic or bicyclic group containing from 1 to 3 heteroatoms said group being unsubstituted or substituted by one or more halogen atoms, alkyl groups, alkoxy groups and/or oxo groups; R1 represents a hydrogen or halogen atom or an alkyl, alkoxy or methylamino group; and R2 represents a carboxyl group; and pharmaceutically acceptable salts thereof; to processes for their preparation; to pharmaceutical compositions containing them; and to their medical use as antihistaminic and antiallergic agents.

Abstract: Indolylpiperidine compounds of formula (I) wherein: A1 represents an alkylene, alkyleneoxy, alkylenethio, alkanoyl or hydroxyalkylene group; A2 represents a single bond, an alkylene or alkenylene group; W represents a single bond or a phenylene or furanylene group which is unsubstituted or substituted by one or more halogen atoms, alkoxy groups and/or alkyl groups; R2 represents a hydrogen or halogen atom or an alkyl or alkoxy group; and R3 represents a carboxyl group or a tetrazolyl group. The present invention provides novel indolylpiperidine compounds having imporved antihistamine and antiallergic activity.

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