the following scheme str7 the first reaction of the present invention is the cyanoethylation of 4 fluorophenol in the presence of a proper catalyst to form ether bond examples of a catalyst which is effectively used in this reaction are copper compound such as cupric hydroxide cupric acetate cupric acetate monohydrate cupric carbonate and cupric oxide powdered copper tertiary amine such as trimethylamine triethylamine tri n butylamine tri n octylamine and dimethylcyclohexylamine potassium hydroxide barium hydroxide and zinc hydroxide tertiary amine such as triethylamine is preferably used in the industrial production since the reaction can be conducted in a high yield with a simple operation after the reaction such as removing catalyst and in a low cost conditions for the reaction cannot be sweepingly determined since they vary depending on the kinds of a catalyst however a catalyst is generally used in such an amount as more than 0 01 times mole preferably around 0 1 to around 0 5 times mole based on 4 fluorophenol acrylonitrile is preferably used in an excess amount based on 4 fluorophenol however about 2 to 3 times mole of acrylonitrile based on 4 fluorophenol is sufficient though acrylonitrile also works as a solvent nonpolar solvent such as benzene and toluene or polar solvent such as water and ethanol can be used if necessary when acrylonitrile is used as a solvent the reaction temperature is preferably.