ONE-POT SYNTHESIS OF 1H-INDAZOLO[2,l-b]- PHTHALAZINETRIONE CATALAZED BY MAGNETIC ROOM TEMPERATURE DICATIONIC IONIC LIQUID UNDER SOLVENT-FREE CONDITIONS

摘要

The efficient one-pot condensation of aldehyde, dimedone, and phthalhydrazide has been achieved in the presence of a catalytic amount of Fe(III)-based dicationic ionic liquid, [C4(mim)2](FeCl4)2, as a novel environmentally benign magnetic catalyst under solvent-free conditions. The catalyst was easily separated after completion of the reaction and was recycled four times without affecting the catalytic property.