反应详情

To a solution of 1.23 g (0.0081 mol) of piperonyl alcohol and 2.50 g (0.0085 mol) of 1-bromo-4-(4-isopentyloxy-butyloxy)-butane in 30 cc of absolute 1,2-dimethoxy-ethane, there is carefully added under nitrogen and while stirring, over the course of 20 minutes, 0.34 g (0.0077 mol) of 55% sodium hydride dispersion in oil. The mixture is stirred at 60° for 20 hours and the resulting sodium bromide is subsequently suction filtered, washed with ether and the filtrate is evaporated. After chromatography of the residue on silica gel with hexane/ethyl acetate (97:3) to (9:1), the [4-(4-Isopentyloxy-butyloxy)-butyl]-piperonyl ether is obtained as a colourless oil.

1. washwashed with ether
2. customthe filtrate is evaporated