Triethylamine → N-[5-({2-[(cyclopropylcarbonyl)amino]imidazo[1,2-b]pyridazin-6-yl}oxy)-2-methylphenyl]-2-methyl-1,3-thiazole-4-carboxamide

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Reaction Steps

A mixture of 2-methyl-1,3-thiazole-4-carboxylic acid (120 mg, 0.84 mmol), N-[6-(3-amino-4-methylphenoxy)imidazo[1,2-b]pyridazin-2-yl]cyclopropanecarboxamide (210 mg, 0.65 mmol), 1-hydroxybenzotriazole (110 mg, 0.84 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (160 mg, 0.84 mmol), triethylamine (85 mg, 0.84 mmol) and N,N-dimethylformamide (5 mL) was stirred at room temperature for 16 hr. The solvent was evaporated under reduced pressure, ethyl acetate/tetrahydrofuran and water were added to the residue, and the aqueous layer was extracted with ethyl acetate/tetrahydrofuran (×4). Combined organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, and filtrated. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (ethyl acetate/hexane=40/60→100/0) to give the title compound (180 mg, 62%) as a white solid.

Provenance & Evidence