Morpholine → N-[6-(3-{[3-(trifluoromethyl)benzoyl]amino}phenoxy)imidazo[1,2-b]pyridazin-2-yl]morpholine-4-carboxamide

Temperature

80 °C

A mixture of 2,2,2-trichloroethyl [6-(3-{[3-(trifluoromethyl)benzoyl]amino}phenoxy)imidazo[1,2-b]pyridazin-2-yl]carbamate (140 mg, 0.237 mmol), morpholine (31 mL, 0.356 mmol), N,N-diisopropylpropan-2-amine (123 μL, 0.713 mmol) and dimethyl sulfoxide (10 mL) was heated to 80° C. and the mixture was stirred for 24 hr. After the reaction mixture was allowed to cool to room temperature, saturated aqueous sodium hydrogencarbonate solution was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with water and saturated brine, dried over anhydrous magnesium sulfate, and filtrated. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (ethyl acetate/hexane=50/50→100/0) and precipitated from diisopropyl ether to give the title compound (92 mg, 73%) as a pale-green powder.

1. temperatureto cool to room temperature
2. extractionthe mixture was extracted with ethyl acetate
3. washThe extract was washed with water and saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltrated
6. customThe solvent was evaporated under reduced pressure
7. customthe residue was purified by silica gel column chromatography (ethyl acetate/hexane=50/50→100/0)
8. customprecipitated from diisopropyl ether

ORD record

ord-37fd23b36eaf42eea089a7acf569393c

Source dataset

uspto-grants-2011_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08034812B2