反应详情

温度

25 °C

A mixture of sulfuric acid (5.79 g, 59.03 mmol, 2.25 equiv) and nitric acid (2.48 g, 39.37 mmol, 1.50 equiv) was added into 1-bromo-4-tert-butylbenzene (5.6 g, 26.28 mmol, 1.00 equiv) while maintaining the temperature below 10° C. The resulting solution was stirred for 20 h at 25° C., poured into water and extracted with ether. The organic phase was dried over anhydrous sodium sulfate. After filtered and concentrated under reduced pressure, the residue was purified through a silica gel column with ethyl acetate/petroleum ether (1:200-1:50) to afford the title compound as a yellow liquid. 1H-NMR (400 MHz, DMSO-d6): δ ppm 1.361(s, 9H), 7.454(dd, J=2.4 Hz, J=8.4 Hz, 1H), 7.65(d, J=8.4 Hz, 1H), 7.848(d, J=2.4 Hz, 1H).

1. temperaturewhile maintaining the temperature below 10° C
2. extractionextracted with ether
3. dry with materialThe organic phase was dried over anhydrous sodium sulfate
4. filtrationAfter filtered
5. concentrationconcentrated under reduced pressure
6. customthe residue was purified through a silica gel column with ethyl acetate/petroleum ether (1:200-1:50)