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以2-卤代-4-叔丁基苯酚、甲醛水溶液和1,3-丙二胺为原料经曼尼希缩合“一锅法”反应合成四氢嘧啶桥联胺基酚类配体,利用甲基铝和配体反应制得了相应的铝络合物。利用核磁共振(~1 H NMR、~(13)C NMR)及元素分析等对化合物结构进行了表征,研究了铝络合物的催化性能。研究表明,铝络合物在室温下能够催化ε-己内酯开环聚合,具有良好的活性,当升高温度时,催化活性进一步提高。利用凝胶渗透色谱(GPC)表征了所得聚合物的分子量及其分布。
The tetrahydropyrimidine bridged aminophenol ligands were synthesized via Mannich condensation and one-pot reaction using 2-halo-4-tert-butylphenol, formalin and 1,3-propanediamine as raw materials The corresponding aluminum complex was obtained by the reaction of methylaluminum and ligand. The structures of the compounds were characterized by 1H NMR and ~ (13) C NMR. The catalytic properties of the aluminum complexes were investigated. The results show that the aluminum complex can catalyze the ring-opening polymerization of ε-caprolactone at room temperature and has good activity. When the temperature is increased, the catalytic activity is further increased. The molecular weight of the resulting polymer and its distribution were characterized by gel permeation chromatography (GPC).