4-Methylmorpholine → N-(6-{3-[(3-phenylprop-2-ynoyl)amino]phenoxy}imidazo[1,2-b]pyridazin-2-yl)cyclopropanecarboxamide

Participants

Reaction Steps

To a solution of 3-phenylprop-2-ynoic acid (85 mg, 0.581 mmol) in tetrahydrofuran (3 mL) were added isobutyl chlorocarbonate (76 μL, 0.581 mmol) and 4-methylmorpholine (80 μL, 0.727 mmol) under ice-cooling, a solution of N-[6-(3-aminophenoxy)imidazo[1,2-b]pyridazin-2-yl]cyclopropanecarboxamide (150 mg, 0.484 mmol) in N,N-dimethylformamide (3 mL) was further added thereto, and the mixture was stirred at room temperature for 16 hr. Water was added to the reaction mixture, and the precipitated solid was filtrated and washed with water to give the title compound (188 mg, 89%) as a white powder.

Provenance & Evidence