Anti-histaminic benzimidazole, imidazopyridine and purine derivatives
申请人:Janssen Pharmaceutica N.V.
公开号:US04943580A1
公开(公告)日:1990-07-24
Novel 1-alkyl substituted benzimidazole derivatives and their pharmaceutically acceptable acid addition salts having anti-histaminic properties, compositions containing the same, and methods of treating allergic diseases in warm-blooded animals.
With the aim of obtaining new H1-antihistaminicagents, transformations of previously reported antihistaminic benzimidazoles were performed on the basis of the concept of bioisosterism. Among the compounds prepared, imidazo[4,5-b]pyridine (8) and 4(3H)-quinazolinone (11) exhibited significant H1-antihistaminic activity.