2-Chloropyrimidine → HCID 10065515, compound

Participants

Reaction Conditions

Reaction Steps

To 3-amino-5-(4-methoxy-phenyl)-1,5-dihydro-pyrazolo[4,3-c]pyridazin-6-one (purchased from Bionet, 67.6 mg, 0.2628 mmoles) in N-methylpyrrolidinone (263 uL) was added 2-chloro-pyrimidine (15.1 mg, 0.5 eq). The reaction was stirred for 5 hours at 130° C. to give crude desired product as evidenced by mass spectrometry. The reaction was diluted with methanol (2 ml) and purified by reverse phase chromatography to give 25 mg (28%) of pure 5-(4-methoxy-phenyl)-3-(pyrimidin-2-ylamino)-1,5-dihydro-pyrazolo[4,3-c]pyridazin-6-one (I-17) as a solid. LC/MS: tret=2.13 min, M+H−=336.1.

Provenance & Evidence