TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): The amide derivative is prepared by adding dibromo adipoyl chlorides and dehydrated toluene to flask with stirring apparatus under nitrogen stream, cooling reactor, dripping solution of p-iodobenzene at reactor, stirring, dripping 10% hydrochloric acid aqueous solution, filtering reaction liquid obtaining thin purple deposit, cleaning deposit, drying at room temperature obtaining fine purple powder, adding fine purple powder, potassium fluoride and diethylene glycol, adding reaction liquid to water, filtering aqueous solution obtaining skin color deposit, adding skin color deposit to dichloromethane, stirring, drying filtrate with anhydrous magnesium sulfate, concentrating under reduced pressure and recrystallizing with toluene. SPECIFIC COMPOUNDS - 16 Compounds (1) and (2) are specifically disclosed, e.g. 2,5-bis-(4-diphenylamino-phenyl)-2,5-diaza-bicyclo(2.2.2)octane-3,6-dione and compounds of formula (A-1)-(A-4).    EXAMPLE - The N,N'-bis(4-iodophenyl)-2,5-diaza-3,6-dioxo-bicyclo (2.2.2)-octane was prepared by adding ( alpha ),( alpha ')-dibromo adipoyl chlorides (17.7 g) and dehydrated toluene (50 ml) to three neck flask with stirring apparatus under nitrogen stream, cooling reactor to 0 degrees C, dripping solution of p-iodobenzene at reactor over 1 hour, stirring for greater than or equal to 30 minutes, dripping 10% hydrochloric acid aqueous solution (50 ml) cooled at 0 degrees C over 30 minutes, filtering reaction liquid obtaining thin purple deposit, cleaning deposit, drying at room temperature obtaining fine purple powder (22.3 g), adding fine purple powder (22.1 g), potassium fluoride (10.9 g) and diethylene glycol (100 ml) to three necked flask with stirring apparatus under nitrogen stream, standing to cool to room temperature, adding reaction liquid to water (600 ml), filtering aqueous solution obtaining skin color deposit, adding skin color deposit to dichloromethane (800 ml), stirring for 1 hour, filtering and removing gray powder which does not dissolve on dichloromethane, drying filtrate with anhydrous magnesium sulfate, concentrating under reduced pressure and recrystallizing with toluene obtaining white powder (3.5 g).