反应详情

1.77 g (0.041 mol) of 55% sodium hydride dispersion in oil are carefully added over the course of 40 minutes, under nitrogen and while stirring, to 26.0 g (0.163 mol) of 4-isopentyloxy-butanol. The mixture is stirred at 60° for 30 minutes and 11.4 g (0.053 mol) of 1,4-dibromobutane are subsequently added dropwise and it is stirred at 60° for 20 hours. The resulting sodium bromide is suction filtered, washed with ether and the filtrate is evaporated. The residue is fractionally distilled in a high vacuum and apart from the excess 4-isopentyloxy butanol, 1-bromo-4-(4-isopentyloxy-butyloxy)-butane, having a B.P. of 121-123°/0.7 mm Hg, is obtained as a colourless liquid.

1. stirringit is stirred at 60° for 20 hours
2. filtrationfiltered
3. washwashed with ether
4. customthe filtrate is evaporated
5. distillationThe residue is fractionally distilled in a high vacuum and apart from the excess 4-isopentyloxy butanol, 1-bromo-4-(4-isopentyloxy-butyloxy)-butane
6. customis obtained as a colourless liquid