Triphenylphosphine → 4-Chloro-3-(3-fluorophenyl)-1-[2-(4-methylpiperazin-1-yl)ethyl]-5-phenyl-pyrazolo[3,4-c]pyridazine

Participants

Reaction Steps

A mixture of 4-chloro-3-(3-fluorophenyl)-5-phenyl-1H-pyrazolo[3,4-c]pyridazine (0.33 mmol), 2-(4-methylpiperazin-1-yl)ethanol (0.65 mmol), diethyl azodicarboxylate (114 mg, 0.65 mmol) and triphenyl phosphine (171 mg, 0.65 mmol) in 1,4-dioxane (2 mL) was heated using microwave irradiation to a temperature between 85 and 120° C. for a 30 to 90 min period. The reaction mixture was concentrated in vacuo and the residue was purified by preparative HPLC to provide Compound 8.

Provenance & Evidence