反应详情

17.7 g (0.1 mol) of 3-(2-aminoethyl)chroman are dissolved in 100 ml of methanol, and then 10.5 g (0.1 mol) of triethylamine and 19.5 g (0.1 mol) of 4-bromobutyric acid ethyl ester are added to the solution. The reaction mixture is stirred for 15 hours at room temperature and is then concentrated under a water-jet vacuum. The residue is taken up in diethyl ether and washed neutral with ice-water. The ethereal phase is dried over potassium carbonate and concentrated by evaporation. Oily N-(3-ethoxycarbonylpropyl)-N-[2-(chroman-3-yl)ethyl]-amine is thus obtained and can be used further in crude form.

1. concentrationis then concentrated under a water-jet vacuum
2. washwashed neutral with ice-water
3. dry with materialThe ethereal phase is dried over potassium carbonate
4. concentrationconcentrated by evaporation