Sulfuric Acid → 4,5-Dihydro-6-[4-[[1-(4-pyridinyl)ethylidene]amino]phenyl]-3(2H)-pyridazinone

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Reaction Steps

A solution containing 0.36 g (0.003 mol) of 4-acetylpyridine and 0.57 g (0.003 mol) of 6-(4-aminophenyl)-4,5-dihydropyridazin-3(2H)one in a mixture of 40 ml of toluene and 40 ml of DMT was refluxed over night with a Dean-Stark separator in the presence of catalytic amount of conc. H2SO4. The solvents were evaporated in vacuo and the residue treated with NaHCO3 -solution. The product was filtered and crystallized from ethanol. Yield 0.53 g (60%).

Provenance & Evidence