4,4′-Bis[4-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)phenylcarbonylamino]-3,3′-dichlorodiphenylme-thane has been obtained by the reaction of 4-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)benzoyl chloride with 4,4′-diamino-3,3′-dichlorodiphenylmethane. 1,4-Bis[2-(4-aminophenylcarbonyloxy)ethoxy]benzene has been prepared by the reaction of potassium 4-aminobenzoate with 1,4-bis(2-chloroethoxy)benzene. The synthesized diamine has been reacted with maleic anhydride to obtain 1,4-bis[4-(2-carboxyethen-1-ylcarbamoyl)phenyl-carbonyloxyethoxyjbenzene, whose subsequent cyclization with acetic anhydride gave 1,4-bis{2-[4-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-phenylcarbonyloxy]ethoxy}benzene.

中文翻译：

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4,4'-双[4-（2,5-二氧代-2,5-二氢-1 H-吡咯-1-基）-苯基羰基氨基] -3,3'-二氯二苯甲烷和1,4-双{ 2- [4-（2,5-二氧代-2,5-二氢-1 H-吡咯-1-基）-苯基羰氧基]乙氧基}苯

通过4的反应获得了4,4'-双[4-（2,5-二氧代-2,5-二氢-1 H-吡咯-1-基）苯基羰基氨基] -3,3'-二氯二苯基甲烷-（2,5-二氧代-2,5-二氢-1 H-吡咯-1-基）苯甲酰氯与4,4'-二氨基-3,3'-二氯二苯甲烷。通过4-氨基苯甲酸钾与1，4-双（2-氯乙氧基）苯的反应制备了1，4-双[2-（4-氨基苯基羰基氧基）乙氧基]苯。合成的二胺已与马来酸酐反应，得到1,4-双[4-（2-羧基乙烯-1-基氨基甲酰基）苯基-羰基氧基乙氧基苯，随后将其与乙酸酐环化，得到1,4-双{2- [4- （2，5-二氧代-2，5-二氢-1 H-吡咯-1-基）-苯基羰氧基]乙氧基}苯。