反应详情

温度

50 °C

4-Bromo-5-[4-(chloromethyl)phenyl]-1-(2-methylpropyl)-1H-benzotriazole (170 mg, 0.449 mmol), 3-methylimidazolidine-2,4-dione (102 mg, 0.898 mmol) and potassium carbonate (186 mg, 1.347 mmol) were combined in acetonitrile (3 ml) and heated at 50° C. for 16 hours. The mixture was cooled to ambient temperature, diluted with dichloromethane and filtered. The filtrate was washed with aqueous saturated ammonium chloride and brine. The organic extract was dried with sodium sulfate, filtered, and concentrated in vacuo. The residue was purified via silica gel chromatography (acetone/dichloromethane gradient), providing the titled compound as white solid: 1H NMR (500 MHz, d6-DMSO): 1H NMR δ 8.00 (d, J=8.5 Hz, 1H), 7.55 (d, J=8.5 Hz, 1H), 7.48 (d, J=7.9 Hz, 2H), 7.42 (d, J=7.9 Hz, 2H), 4.60-4.57 (m, 4H), 3.97 (s, 2H), 2.90 (s, 3H), 2.34-2.27 (m, 1H), 0.93-0.88 (m, 6H) ppm. LRMS m/z (M+H) 455.9 and 457.9 found, 456.1 and 458.1 required.

1. temperatureThe mixture was cooled to ambient temperature
2. filtrationfiltered
3. washThe filtrate was washed with aqueous saturated ammonium chloride and brine
4. extractionThe organic extract
5. dry with materialwas dried with sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe residue was purified via silica gel chromatography (acetone/dichloromethane gradient)