10 u00b0 c to 100 u00b0 c preferably from 0 u00b0 c to 30 u00b0 c under agitation the reaction is completed within 30 minutes to 24 hours and the end of the reaction may be checked by means of t l c thin layer chromatography the reaction of the first step may be continued to the reaction of the second step in a continuous operation sequence alternatively the second step operation may be carried out after refining the resultant product of the first step for example by means of column chromatography the second step operation is carried out by dissolving the resultant product of the first step in an inert organic solvent followed by addition of an amine compound represented by the formula of str22 2 to 10 moles of amine relative to one mole of the resultant produce of the first step are used and the second step is carried out generally at a reaction temperature of from 10 u00b0 c to 100 u00b0 c preferably from 0 u00b0 c to 30 u00b0 c the reaction is completed within 30 minutes to 12 hours when r 9 and r 10 are bydrogen atoms the resultant product of the second step for instance 3 4 3 dialkylaminoalkylphenoxy 2 butenylamino 4 amino 1 2 5 thiadiazol 1 oxide str23 may be treated with a mineral acid to obtain n 4 3 dialkylaminoalkylphenoxy 2 butenyl ethanediimidamide or a mineral acid salt thereof thereafter the resultant product may be reacted with 1 to 10.