Hydrazinopyridazine compound, process for production thereof, and use thereof as medicament

摘要

A hydrazinopyridazine compound represented by the formula <IMAGE> (I) wherein R1 represents a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a lower alkyl group which may optionally be substituted by a halogen atom or a hydroxyl, lower alkoxy, lower alkylthio, lower alkanoylamino, allyloxy or tetrahydrofurfuryloxy group, a lower alkoxy group which may optionally be substituted by a 2-furyl, phenyl or lower alkoxy group, a lower alkenyl group, a lower alkenyloxy group, or a lower alkynyl group; R2 represents a hydrogen atom, a halogen atom, a cyano group, a lower alkyl group which may optionally be substituted by a halogen atom or a lower alkoxy group, a lower alkoxy group, a lower alkenyl group, or a lower alkenyloxy group; R3, R4 and R5, independently from each other, represent a hydrogen atom, a halogen atom, a lower alkyl group which may optionally be substituted by a lower alkoxy group, or a lower alkoxy group; R6 and R7, independently from each other, represent a hydrogen atom or a methyl group; Y represents -NH2, -NH-COOC2H5, or <IMAGE> Z represents -O-, -S-, or <IMAGE> in which R8 represents a hydrogen atom or a lower alkyl group; and n is 1 or 2, or its salt; a process for the production the aforesaid compounds; and use of such compounds as antihypertensive agents.