BENZO[5,6]CYCLOHEPTA[1,2-B]PYRIDINE DERIVATIVES AND ANTIALLERGIC AGENTS COMPRISING SAME

摘要

Benzo¢5,6!cyclohepta¢1,2-b!pyridine derivatives of the following formula: (see fig. I) wherein R1 represents a cyano, carbamoyl, alkylsulfoxy, alkylsulfonyl, tetrazolyl or sulfonic acid group, and R2 represents a hydrogen atom, a cyano, phenyl, aralkyl, alkoxycarbonylalkyl, aminoalkylcarbamoylalkyl or lower alkyl group, or a group or -X-R4, X being an oxygen or sulfur atom, R3 standing for a hydrogen atom or a substituted or unsubstituted lower alkyl, phenyl or aralkyl group, and R4 being a substituted or unsubstituted lower alkyl, phenyl or aralkyl group or an aminoalkyl group, and salts thereof. Antiallergic and antihistamic agents containing one of the above derivatives or salts as an active ingredient are also described.