反应详情

10 ml of 6-bromohexanoyl chloride were dissolved in a mixture of 100 ml of absolute dichloromethane and 100 ml of absolute toluene. A solution of 13.6 g of N-methyl-N-[2-(3,4-dimethoxyphenyl)-ethyl]-amine and 9.5 ml of triethylamine in 25 ml of absolute toluene was added dropwise to the solution with ice cooling. The reaction mixture was subsequently stirred at room temperature for 12 hours. In order to work it up, the precipitated salts were filtered out and washed with toluene. The filtrate was washed first with 1 molar citric acid solution and then with sodium bicarbonate solution, dried with magnesium sulfate and concentrated. 19.3 g of 5-{N-[2-(3,4-dimethoxyphenyl)ethyl]-N-methylaminocarbonyl}-pentyl bromide were obtained as an oil.

1. filtrationthe precipitated salts were filtered out
2. washwashed with toluene
3. washThe filtrate was washed first with 1 molar citric acid solution
4. dry with materialwith sodium bicarbonate solution, dried with magnesium sulfate
5. concentrationconcentrated