Amphoteric Drugs. II. Synthesis and Antiallergic Activity of (4-(5H-Dibenzo(a,d)cyclohepten-5-ylidene)piperidino)alkanoic Acid Derivatives and Related Compounds.
Bis-benzo, cyclohepta piperidylidene, piperidine and piperazine
申请人:——
公开号:US05416087A1
公开(公告)日:1995-05-16
Bis-benzo cyclohepta piperidine, piperidylidene and piperazine compounds of the general formula, ##STR1## and pharmaceutically acceptable salts thereof are disclosed, which possess anti-allergic and/or anti-inflammatory activity. Methods for preparing and using the compounds are also described.
Amphoteric Drugs. II. Synthesis and Antiallergic Activity of (4-(5H-Dibenzo(a,d)cyclohepten-5-ylidene)piperidino)alkanoic Acid Derivatives and Related Compounds.
A simple method of transforming clalssical tricyclic antihistaminics into nonsedative antiallergic agents with equal potency in rats and guinea-pigs is described. A series of [4-(5H-dibenzo[a, d]cyclohepten-5-ylidene)-piperidino]alkanoic acid derivatives (6a) and related compounds (6b-f) were synthesized and examined for antiallergic and antihistaminic activities and effects on the central nervous system (CNS) in comparison with the corresponding N-methyl derivatives (2a-f). N-Alkylcarboxylic acids (6a-f) showed stronger inhibitory effects on 48h homologous passive cutaneous anaphylaxis (PCA) in rats than 2a-f, and also were less effective in prolongation of the sleeping time on hexobarbital-induced anesthesia in mice in comparison with 2a-f. As a result of further modification, it was found that introduction of an oxygen atom into the central ring of the tricyclic system in amphoteric compounds enhanced their antiallergic and antihistaminic activities. 3-[4-(6H-Dibenz[b, e]oxepin-11-ylidene)piperidino]propionic acid (6c) exhibited strong inhibitory effects on 48h homologous PCA in rats (ED50=0.067mg/kg, p.o.) and on histamine-induced bronchoconstriction in anesthetized guinea-pigs (ED50=0.0085mg/kg, p.o.), and thus is a promising candidate as an antiallergic agent.