Transition-metal-catalyzed N–H insertion of a diazocarbonyl compound is applied for polycondensation for the first time to give a new type of aromatic polyamine. The well-defined polyamines were obtained by [RuCl₂(p-cymene)]₂-catalyzed reaction of diethyl 1,4-phenylenebis(diazoacetate) with dianilines bearing a variety of linkers between two aniline units. The polycondensation proceeded at 30 °C in CH₂Cl₂ with 5.0 mol % of the Ru metal to [NH₂ or N₂═C] to afford the products with M_n = 6400–28 300 in moderate to high yield. Ethoxycarbonyl groups located at an adjacent position to NH imparted solubility to the polyamines, and their glass transition temperatures can be varied depending on the linker structure in a range of 88–173 °C.

中文翻译：

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钌催化的1,4-苯二双（重氮乙酸酯）二烷基酯与二苯胺的缩聚反应：主链构架中每个氮的相邻碳原子上带有烷氧羰基的良好定义的芳族多胺的合成

重氮羰基化合物的过渡金属催化N–H插入首次用于缩聚反应，得到一种新型的芳族多胺。通过[RuCl ₂（p- cymene）] ₂催化的二乙基1，4-亚苯基双（重氮乙酸酯）与二苯胺在两个苯胺单元之间带有各种连接基的反应获得了明确定义的多胺。在30℃下在CH进行缩聚₂氯₂与5.0摩尔％的Ru金属的以[NH ₂或N ₂ = C]，得到的产品中号_Ñ= 6400–28 300，中等至高产。与NH相邻的乙氧羰基赋予多胺以溶解性，它们的玻璃化转变温度可根据接头结构在88–173°C范围内变化。