Potassium Carbonate → 4-[2-(4-methoxyphenyl)pyrazolo[1,5-b]pyridazin-3-yl]-N-phenylpyrimidin-2-amine

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To a solution of 100 mg (0.31 mmol) of (2E)-3-(dimethylamino)-1-[2-(4-methoxyphenyl)pyrazolo[1,5-b]pyridazin-3-yl]prop-2-en-1-one in 5 ml of N,N-dimethylformamide were added 103 mg (0.39 mmol) of N-phenylguanidinium nitrate and 153 mg (1.11 mmol) of potassium carbonate. The mixture was stirred at 120° C. for 28 hours. Removal of solvent followed by column chromatography with dichloromethane:methanol=100:1 gave the crude product. The crude product was washed with dichloromethane to afford the desired compound in 30% yield.

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