HCID 69332557, compound → HCID 69331987, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-(2-bromophenyl)-6-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridazinyl)-3-[(4-methoxybenzyl)amino]-2-pyrazinecarbonitrile (2.05 g) containing 6-(2-bromophenyl)-5-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridazinyl)-3-[(4-methoxybenzyl)amino]-2-pyrazinecarbonitrile in CHCl3 (60 ml), water (3 ml) and 2,3-dichloro-5,6-dicyano-1,4-benzoqinone (2.63 g) were added and the mixture was stirred at 25-30° C. for 24 hours. The mixture was washed with 1N aq. NaOH, dried over MgSO4 and concentrated under reduced pressure to give a residue. The residue was purified by column chromatography on silica gel. By elution of a mixture of n-hexane and EtOAc (70:30 v/v) was obtained 3-amino-5-(2-bromophenyl)-6-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridazinyl)-2-pyrazinecarbonitrile as a solid (941 mg) and by elution of a mixture of n-hexane and EtOAc (50:50 v/v) was obtained 3-amino-6-(2-bromophenyl)-5-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridazinyl)-2-pyrazinecarbonitrile as a solid (92 mg).

Provenance & Evidence