5-Aminoisoquinoline → 5-Acetyl-6-(3-chlorophenyl)-2-ethyl-4-(isoquinolin-5-ylamino)pyridazin-3(2H)-one

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Reaction Steps

To a stirred solution of 100 mg (0.311 mmol) of 5-acetyl-2-ethyl-4-nitro-6-(3-chlorophenyl)pyridazin-3(2H)-one (Dal Piaz, V et al, J. Med. Chem. 1997, 40, 1417) in ethanol (4 mL), 5-amino-isoquinoline (67 mg, 0.467 mmol) was added. The resulting mixture was stirred at room temperature for two hours. The solvent was evaporated and the residue purified by column chromatography (silica gel, hexane/ethyl acetate 1:2) to yield the title compound (28 mg, 21.5% yield).

Provenance & Evidence