反应详情

温度

110 °C

A solution of (S)-3-(2-chloropyrimidin-4-yl)-4-isopropyloxazolidin-2-one (163 mg, 0.674 mmol), 2,2,2-trifluoro-1-phenylethanamine (624 mg, 3.56 mmol, 5.3 equiv) and p-toluenesulfonic acid monohydrate (321 mg, 1.69 mmol, 2.5 equiv) in n-BuOH (3 mL) was heated at 110° C. for 2 h and treated with additional p-toluenesulfonic acid monohydrate (321 mg, 1.69 mmol, 2.5 equiv), then heated at 110° C. for 1½ h. After cooling, the solid reaction mixture was treated with MeCN, sonicated and filtered. The filtrated was concentrated and purified by silica gel column chromatography (EtOAc/Heptane 0 to 30%) to give (4S)-4-isopropyl-3-(2-(2,2,2-trifluoro-1-phenylethylamino)pyrimidin-4-yl)oxazolidin-2-one (65 mg) in 25% yield. 1H NMR (400 MHz, CD3OD) δ 8.215 (d, J=6.1 Hz, 0.5H), 8.212 (d, J=6.1 Hz, 0.5H), 7.52 (t, J=7.1 Hz, 2H), 7.46 (dd, J=5.8, 3.8 Hz, 1H), 7.43-7.34 (m, 3H), 5.86 (qd, J=8.2, 4.0 Hz, 1H), 4.83-4.75 (m, 1H), 4.42-4.33 (m, 2H), 2.62 (dtd, J=14, 7.0, 3.8 Hz, 0.5H), 2.28 (br s, 0.5H), 1.02 (d, J=7.1 Hz, 1.5H), 0.91 (d, J=7.1 Hz, 1.5H), 0.88 (d, J=7.11 Hz, 1.5H), 0.73 (d, J=7.1 Hz, 1.5H); HRMS(B) m/z 381.1545 (M+H)+.

1. temperatureAfter cooling
2. customthe solid reaction mixture
3. customsonicated
4. filtrationfiltered
5. concentrationThe filtrated was concentrated
6. custompurified by silica gel column chromatography (EtOAc/Heptane 0 to 30%)