反应详情

To a mixture of 4-chloro-6-(5-chloro-2-ethoxy-phenyl)-pyrimidin-2-ylamine (100 mg, 0.37 mmol) and ethanol (20 ml) was added a solution of hydrogen chloride in 1,4-dioxane (4 M, 0.1 ml). After stirring for 10 minutes, 4-oxazol-5-yl-phenyl-amine (60 mg, 0.37 mmol) was added and the mixture was heated under reflux for 5 hours. After concentrating under reduced pressure, the residue was stirred with ethyl acetate (10 ml) and saturated aqueous sodium bicarbonate solution (10 ml). The solid was filtered and purified by flash chromatography eluting with ethyl acetate-hexane (1:1 followed by 3:2) to yield the title compound (110 mg, 75% yield). 1H NMR (acetone-d6) δ 1.44 (t, 3H, J=7.0 Hz, CH3), 4.17 (q, 2H, J=7.0 Hz, CH2), 5.88 (br s, 2H, NH), 7.04 (s, 1H, Ar), 7.12 (d, 1H, J=8.5 Hz, Ar), 7.37 (dd, 1H, J=8.8 Hz, J=2.9 Hz, Ar), 7.46 (s, 1H, Ar), 7.68 (d, 2H, J=8.7 Hz, Ar), 7.88-7.91 (m, 2H, Ar), 8.07 (d, 1H, J=2.8 Hz, Ar), 8.16 (s, 1H, Ar), 8.64 (br s, 1H, NH).

1. temperaturethe mixture was heated
2. temperatureunder reflux for 5 hours
3. concentrationAfter concentrating under reduced pressure
4. stirringthe residue was stirred with ethyl acetate (10 ml) and saturated aqueous sodium bicarbonate solution (10 ml)
5. filtrationThe solid was filtered
6. custompurified by flash chromatography
7. washeluting with ethyl acetate-hexane (1:1 followed by 3:2)