反应详情

N-benzyl-N-phenyl-N-ethylamine (2.25 g, 0.0107 mol) was dissolved in anhydrous dichloromethane (80 mL) and 2,4,4,6-tetrabromocyclohexadiene-1-one (4.36 g, 0.0107 mol) was added in 6 equal portions over a 20 min. period. Stirring was continued at ambient temperature for 20 hours; the organic phase was successively washed with 0.5N solution of sodium hydroxide in water (50 mL), 1N solution of sodium hydroxide in water (50 mL), water (70 mL) and brine (75 mL). The organic phase was dried with magnesium sulfate and concentrated under reduced pressure. The residue was purified by flash chromatography on silica using ethyl acetate/n-heptane (1:99) as mobile phase to yield N-benzyl-N-(4-bromophenyl)-N-ethylamine (2.38 g, 0.0082 mol) as a colorless oil.

1. washthe organic phase was successively washed with 0.5N solution of sodium hydroxide in water (50 mL), 1N solution of sodium hydroxide in water (50 mL), water (70 mL) and brine (75 mL)
2. dry with materialThe organic phase was dried with magnesium sulfate
3. concentrationconcentrated under reduced pressure
4. customThe residue was purified by flash chromatography on silica