g 0 84 mm of 2 3 fluoro 4 hydroxyphenyl 5 4 hexylphenyl 1 3 4 thiadiazole 0 23 g 1 09 mm of hexyl iodide 0 08 g of 85 potassium hydroxide and 6 ml of butanol were mixed followed by refluxing for 5 hours under stirring after the reaction 10 ml of methanol was added to the reaction mixture followed by cooling to room temperature and further cooling in a freezer to precipitate a crystal the crystal was recovered by filtration and washed with methanol the resultant crystal was dissolved in toluene and washed with water followed by drying with anhydrous magnesium sulfate the magnesium sulfate was recovered by filtration and the filtrate was condensed into a solid the solid was purified by silica gel column chromatography eluent toluene and recrystallized from a mixture solvent ethanol hexane to obtain 0 13 g of 2 3 fluoro 4 hexyloxyphenyl 5 4 hexylphenyl 1 3 4 thiadiazole yield 35 1 str23 2 3 fluoro 4 butyloxyphenyl 5 4 hexylphenyl 1 3 4 thiadiazole example compound no i 70 was synthesized in the same manner as in example 3 str24 2 hexyl 5 3 fluoro 4 hetanoyloxyphenyl 1 3 4 thiadiazole example compound no i 9 was synthesized through the following steps i to iv str25 10 0 g.