Synthesis of Polyarylates and Aliphatic Polyesters by Divalent Acyl‐1,2,4‐triazole: A Route to Metal‐Free Synthesis at Low Temperature
Synthesis of Polyarylates and Aliphatic Polyesters by Divalent Acyl‐1,2,4‐triazole: A Route to Metal‐Free Synthesis at Low Temperature
复制标题
二价酰基-1,2,4-三唑合成聚芳酯和脂肪族聚酯：低温无金属合成的途径
DOI：
10.1038/s41428-021-00484-0
复制
发表时间：
2021
期刊：
影响因子：
2.8
通讯作者：
Yoshikazu Kimura
中科院分区：
文献类型：
--
作者：
Yasuhiro Kohsaka;Ichiro Mori;Kazumasa Homma;Yosuke Akae;Daisuke Matsuura;Yoshikazu Kimura
芳香族、半芳香族和脂肪族聚酯在中等温度（25-80 °C）下通过使用4-（二甲氨基）吡啶作为催化剂的二价酰基-1，2，4-三唑的聚合来合成。虽然由于它们的高结晶度，其中一些单体需要使用甲苯和吡啶作为溶剂，但它们以高产率从二价酰氯制备。在二苯醚中熔融聚合可有效地得到半芳香族和脂肪族聚酯。然而，该方法不适用于芳族聚酯，因为反应体系在80 °C下变得非均相。然而，溶液和界面聚合反应是有效的，在获得芳香族聚酯。该新型单体提供了在中等温度下不使用任何金属催化剂或卤化物单体的聚酯合成。
Aromatic, semiaromatic, and aliphatic polyesters were synthesized at moderate temperatures (25–80 °C) by the polymerization of divalent acyl-1,2,4-triazoles using 4-(dimethylamino)pyridine as a catalyst. The monomers were prepared from divalent acyl chloride in high yields, although some of them required that toluene and pyridine be used as solvents due to their high crystallinity. Melt polymerization in diphenyl ether was effective in affording semiaromatic and aliphatic polyesters. However, this method was not suitable for aromatic polyesters, as the reaction system became heterogeneous at 80 °C. Nevertheless, solution and interfacial polymerization reactions were effective in obtaining aromatic polyesters. The novel monomers provided polyester synthesis at moderate temperature without the use of any metal catalyst or halide monomers.