6-(4-aminophenyl)-4,5-dihydro-3(2h) pyridazinone compounds

Details 6-(4-aminophenyl)-4,5-dihydro-3(2h) pyridazinone compounds 6-(4-aminophenyl)-4,5-dihydro-3(2h) pyridazinone compounds

C - Chemistry, Metallurgy

07

D

260/248, 260/262

C07D 401/12 (2006.01) C07D 237/14 (2006.01) C07D 403/12 (2006.01)

Patent

CA 1228068

TITLE OF THE INVENTION: PYRIDAZINONE DERIVATIVES AND SALTS THEREOF ABSTRACT OF THE DISCLOSURE: There are provided novel pyridazinone derivatives having the general formula (I): Image (I) wherein A represents 5- or 6-membered heterocyclic ring having 1 - 3 nitrogen atoms, which may be substituted by at least one member selected from the group consisting of C1-5 alkyl, cyano, hydroxyl, C1-5 alkoxyl, amino, C1-5 alkylamino, C2-6 dialkylamino, C2-5 acylamino, carboxyl, C2-5 alkoxycarbonyl and carbamoyl, and R1 and R2 indepen- dently represent hydrogen atom or C1-5 alkyl or R1 and R2 may form together C1-5 alkylene, and salts thereof. They are useful as a cardiac stimulant.

469715

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