Phenyl isocyanate → N-[3-(imidazo[1,2-b]pyridazin-6-yloxy)phenyl]-N'-phenylurea

Participants

Reaction Steps

To a solution of 3-(imidazo[1,2-b]pyridazin-6-yloxy)aniline (181 mg, 0.80 mmol) and triethylamine (0.011 mL, 0.08 mmol) in tetrahydrofuran (10 mL) was added phenyl isocyanate (0.104 mL, 0.96 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 NH silica gel column chromatography (ethyl acetate/methanol=100/0→90/10) and precipitated from ethyl acetate to give the title compound (196 mg, 71%) as a white powder.

Provenance & Evidence