反应详情

温度

0 °C

Under argon, 5.07 g (126.93 mmol, 60%) of sodium hydride were suspended in 150 ml of THF, and the mixture was cooled to 0° C. 10.70 g (51.81 mmol) of 5-bromo-2-chloroaniline dissolved in 10 ml of THF were then slowly added dropwise, and the mixture was stirred at 0° C. for 30 min. 25 g (124.34 mmol) of 4-methoxybenzyl chloride were then added to the reaction mixture, and the mixture was subsequently warmed to room temperature. The mixture was stirred at RT for 2 h and then slowly poured onto 150 ml of ice-water. The organic phase was separated off, and the aqueous phase was extracted three more times with ethyl acetate. The combined organic phases were dried over sodium sulphate. After filtration, the solvent was removed under reduced pressure. The crude product was purified chromatographically [column: Kromasil Si 6012, 350 mm×30 mm; mobile phase A: isohexane, mobile phase B: ethyl acetate; gradient: 0 min 98% A→4.65 min 98% A→13 min 87% A→13.01 min 98% A→13.28 min 98% A; flow rate: 70 ml/min; temperature: 20° C.; UV detection: 265 nm]. This gave 12.37 g (27.69 mmol, 57% of theory) of the title compound.

1. additionwere then slowly added dropwise
2. temperaturethe mixture was subsequently warmed to room temperature
3. stirringThe mixture was stirred at RT for 2 h
4. customThe organic phase was separated off
5. extractionthe aqueous phase was extracted three more times with ethyl acetate
6. dry with materialThe combined organic phases were dried over sodium sulphate
7. filtrationAfter filtration
8. customthe solvent was removed under reduced pressure
9. customThe crude product was purified chromatographically [column: Kromasil Si 6012, 350 mm×30 mm; mobile phase A: isohexane, mobile phase B: ethyl acetate; gradient: 0 min 98% A→4.65 min 98% A→13 min 87% A→13.01 min 98% A→13.28 min 98% A; flow rate: 70 ml/min; temperature: 20° C.; UV detection: 265 nm]