TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): Isomannide series compound of formula (I) is prepared by dissolving 2-hydroxy-3,6,7,10,11-pentakis(pentyloxy)triphenylene in acetone in a three-necked flask equipped with a magnetic stirrer to obtain a solution. Anhydrous potassium carbonate is added to the obtained solution. The mixed solution is stirred at room temperature, and then ethyl bromoacetate is added to the stirred solution. The mixture is heated at 60 degrees C to obtain a reaction solution. The reaction solution is cooled to room temperature. The cooled reaction solution is filtered to obtain filtrate. The filtrate is purified by column chromatography, and then re-crystallized with ethanol to obtain light yellow powder i.e. ethyl 2-((3,6,7,10,11-pentakis(pentyloxy)triphenylen-2-yl)oxy)acetate derivative of formula (III). ((3,6,7,10,11-Pentakis(pentyloxy)triphenylen-2-yl)oxy)methyl propanoate derivative of formula (III) is completely dissolved in aqueous solution of sodium hydroxide three-necked flask equipped with a magnetic stirrer to obtain a white precipitate. The white precipitate is heated at 80 degrees C to obtain reaction mixture. The reaction mixture is cooled to room temperature, and then the cooled mixture is poured into deionized water to obtain a solution. Hydrochloric acid is added to the obtained solution to maintain pH to 2-3, and to obtain milky white precipitate. The milky white precipitate is filtered to obtain a filtrate. The filtrate is washed with deionized water, and then the washed filtrate is dried in vacuum. The dried material is re-crystallized with ethanol to give a white solid i.e. 2-((3,6,7,10,11-pentakis(pentyloxy)triphenylen-2-yl)oxy)acetic acid derivative of formula (IV). 2-((3,6,7,10,11-Pentakis(pentyloxy)triphenylen-2-yl)oxy)acetic acid derivative of formula (IV) is completely dissolved in dichloromethane to obtain a reaction solution. Dicyclohexylcarbodiimide and 4-dimethylaminopyridine are added to the reaction solution. The mixed solution is heated at 60 degrees C, where a reaction is carried out to obtain a reaction mixture. The reaction mixture is cooled to room temperature, and then filtered to obtain filtrate. The filtrate is successively washed sodium hydroxide solution and saturated carbonate sodium solution. The washed filtrate is further washed with deionized water to obtain white solid. The white solid is purified by column chromatography, and then recrystallized with ethanol to obtain pale yellow powder i.e. isomannide series compound of formula (I). Isosorbide series compound of formula (II) is prepared by dissolving isosorbide in methylene chloride and carboxylic acid in three-necked flask equipped with magnetic stirrer to obtain a solution. Dicyclohexylcarbodiimide and dimethylaminopyridine are added to the obtained solution to obtain a reaction mixture. The reaction mixture is cooled to room temperature, and then filtered to obtain a filtrate. The filtrate is successively washed with sodium hydroxide solution and saturated sodium bicarbonate solution. The washed filtrate is further washed with deionized water to obtain white solid. The white solid is purified by column chromatography, and then re-crystallized with ethanol to give a pale yellow solid i.e. (3R,6S)-6-((2-bromoacetyl)oxy)-hexahydrofuro(3,2-b)furan-3-yl 2-bromoacetate derivative of formula (V). (3R,6S)-6-((2-Bromoacetyl)oxy)-hexahydrofuro(3,2-b)furan-3-yl 2-bromoacetate derivative of formula (V), 2-hydroxy-3,6,7,10,11-pentakis(pentyloxy)triphenylene, acetone, anhydrous potassium carbonate and potassium iodide into a three-necked flask equipped with a magnetic stirrer, where a reaction is carried out under the protection of nitrogen pale yellow solid. The pale yellow solid is refluxed at 60 degrees C, and then cooled to room temperature. The cooled product is filtered, and then completely purified by column chromatography. The purified product is re-crystallized with a mixed solvent of ethanol and petroleum ether to give a white powder i.e. isosorbide series compound of formula (II).