Triethylamine → N-[3-(imidazo[1,2-b]pyridazin-6-yloxy)phenyl]-N'-[3-(trifluoromethyl)phenyl]urea

Participants

Reaction Steps

To a solution of 3-(imidazo[1,2-b]pyridazin-6-yloxy)aniline (181 mg, 0.80 mmol) and triethylamine (0.040 mL, 0.29 mmol) in tetrahydrofuran (10 mL) was added 3-(trifluoromethyl)phenyl isocyanate (0.154 mL, 1.12 mmol), and the mixture was stirred at room temperature for 18 hr. The reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (ethyl acetate/methanol=100/0→90/10) and precipitated from methanol to give the title compound (205 mg, 62%) as a white powder.

Provenance & Evidence