Acid-Catalyzed Polycondensation of 2-Hydroxymethylthiophene and Some of Its Homologues
Acid-Catalyzed Polycondensation of 2-Hydroxymethylthiophene and Some of Its Homologues
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2-羟甲基噻吩及其部分同系物的酸催化缩聚反应
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
A. Gandini
中科院分区：
文献类型：
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作者：
P. Stagnaro;G. Costa;A. Gandini
将 2-羟甲基噻吩及其乙酸酯置于不同性质和强度的酸性有机介质中并在不同温度下进行。仅当溶液被加热且酸浓度相对较高时，才会发生涉及醇或乙酸酯官能团和噻吩质子的缩聚反应。对后续聚合物结构的全面评估，包括由母体结构的不同甲基化衍生物产生的聚合物，表明在所有游离噻吩位点都发生了亲电取代，并且还形成了共轭序列。通过与糠醇所显示的相比，检查和讨论了这些系统的动力学和机械特征。
2-Hydroxymethylthiophene and its acetate were placed in acidic organic media of various natures and strengths and at different temperatures. Polycondensations involving the alcohol or acetate function and a thiophene proton only occurred if the solutions were heated and the acid concentration was relatively high. The thorough assessment of the structure of the ensuing polymers, including those arising from differently methylated derivatives of the parent structures, indicated that the electrophilic substitutions had taken place at all free thiophene sites and that conjugated sequences had also formed. The kinetic and mechanistic features of these systems are examined and discussed in comparison with those displayed by furfuryl alcohol.