2.88 g (0.010 mol) of 6-(6-Isopentyloxyhexyloxy)-hexanol are mixed with 2.15 g (0.010 mol) of piperonyl bromide and 1.26 g (0.015 mol) of sodium bicarbonate and the mixture is stirred at 80° for 18 hours and then at 120° C. for 6 hours. 1.0 cc of pyridine is added to the reaction mixture which is heated to 80° over the course of 2 hours. The reaction mixture is cooled, taken up in ether, washed with 2N sulphuric acid, water and saturated sodium chloride solution, dried over magnesium sulphate and evaporated. After chromatography of the residue on silica gel with hexane/acetone (98:2) and (96:4), [6-(6-Isopentyloxyhexyloxy)-hexyl]-piperonyl ether is obtained as a colourless oil.
