3-Isocyanatobenzonitrile → (R)-1-(3-cyanophenyl)-3-(6-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)imidazo[1,2-b]pyridazin-3-yl)urea

참여 물질

반응 단계

To a DCM (0.1 mL) solution of (R)-6-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)imidazo[1,2-b]pyridazin-3-amine (Preparation B; 6 mg, 0.019 mmol) cooled in an ice bath was added 3-cyanophenylisocyanate (14 mg, 0.095 mmol) in DCM (0.1 mL) drop-wise. The reaction was slowly warmed to ambient temperature and stirred for 1 hour. The reaction was diluted with DCM (2 mL), washed with water, and concentrated. The crude material was purified by reverse-phase column chromatography, eluting with 5 to 85% acetonitrile/water to yield the pure final product as a solid (3.2 mg, 37% yield). MS (apci) m/z=460.2 (M+H).

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