Manganese catalysed dehydrogenative synthesis of polyureas from diformamide and diamines.

Manganese catalysed dehydrogenative synthesis of polyureas from diformamide and diamines.
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DOI:
10.1039/d3cy00284e
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发表时间:
2023-06-19
影响因子:
5
通讯作者:
--
中科院分区:
化学2区
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本文报道了由二胺和二甲酰胺的缩合偶联反应合成聚脲。该反应由锰钳形络合物催化,并释放氢气作为唯一的副产物,使该过程原子经济和可持续。报道的方法是绿色的比较,目前国家的最先进的生产路线,涉及二异氰酸酯和光气原料。我们还报告了合成聚脲的物理,形态和机械性能。基于我们的机理研究,我们认为,该反应的收益通过异氰酸酯中间体形成的锰催化脱氢的甲酰胺。更安全的原料。贱金属基催化剂。机械学研究。聚脲的化学、物理、形态和机械性能。
We report here the synthesis of polyureas from the dehydrogenative coupling of diamines and diformamides. The reaction is catalysed by a manganese pincer complex and releases H2 gas as the only by-product making the process atom-economic and sustainable. The reported method is greener in comparison to the current state-of-the-art production routes that involve diisocyanate and phosgene feedstock. We also report here the physical, morphological, and mechanical properties of synthesized polyureas. Based on our mechanistic studies, we suggest that the reaction proceeds via isocyanate intermediates formed by the manganese catalysed dehydrogenation of formamides. Safer feedstock. Base-metal based catalyst. Mechanistic studies. Chemical, physical, morphological, and mechanical properties of polyureas.
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