Indirect reduction of CO<sub>2</sub> and recycling of polymers by manganese-catalyzed transfer hydrogenation of amides, carbamates, urea derivatives, and polyurethanes
作者:Xin Liu、Thomas Werner
DOI:10.1039/d1sc02663a
日期:——
approach to the indirect reduction of CO2. Notably, these are the first examples on the reduction of carbamates and urea derivatives as well as on the C–N bond cleavage in amides by transfer hydrogenation. The general applicability of this methodology is highlighted by the successful reduction of 12 urea derivatives, 26 carbamates and 11 amides. The corresponding amines, alcohols and methanol were obtained
极性键(特别是羰基)的减少在有机化学和生物学中具有根本重要性。在此,我们报道了一种锰钳配合物作为一种多功能催化剂,用于酰胺、氨基甲酸酯、尿素衍生物甚至聚氨酯的转移氢化,产生相应的醇、胺和甲醇产品。由于这些化合物类别可以使用CO 2作为C1 结构单元来制备,因此所报道的反应代表了一种间接还原CO 2的方法。值得注意的是,这些是通过转移氢化还原氨基甲酸酯和脲衍生物以及酰胺中 C-N 键断裂的第一个例子。成功还原 12 种尿素衍生物、26 种氨基甲酸酯和 11 种酰胺,凸显了该方法的普遍适用性。相应的胺、醇和甲醇的产率达到97%,收率良好。此外,聚氨酯已成功转化,这代表了实现循环经济的可行战略。基于控制实验和观察到的中间体,提出了可行的机制。