Treatment of 4-(alkylamino)benzoic acid dimer phenyl esters with a base, under conditions where monomeric 4-(alkylamino)benzoic acid phenyl esters polymerize to give well-defined aromatic polyamides, affords not polymers, but cyclic trimers in good yield.
在单体 4-(烷基
氨基)
苯甲酸苯酯聚合生成定义明确的芳香族聚酰胺的条件下,用碱处理 4-(烷基
氨基)
苯甲酸二聚体苯酯,得到的不是聚合物,而是产率很高的环状三聚体。