Efficient and Practical Transfer Hydrogenation of Ketones Catalyzed by a Simple Bidentate Mn−NHC Complex
作者:Robbert Putten、Joeri Benschop、Vincent J. Munck、Manuela Weber、Christian Müller、Georgy A. Filonenko、Evgeny A. Pidko
DOI:10.1002/cctc.201900882
日期:2019.11.7
reductions of carbonyl-containing compounds are highly important for the safe, sustainable, and economical production of alcohols. Herein, we report on the efficient transfer hydrogenation of ketones catalyzed by a highly potent Mn(I)-NHC complex. Mn-NHC 1 is practical at metal concentrations as low as 75 ppm, thus approaching loadings more conventionally reserved for noble metal based systems. With
催化还原含羰基化合物对于安全,可持续和经济地生产醇至关重要。在本文中,我们报告了由高效Mn(I)-NHC络合物催化的酮的有效转移加氢反应。Mn-NHC 1适用于低至75 ppm的金属浓度,因此可以接近传统上为贵金属基系统保留的载荷。在这些低的Mn浓度下,发现催化剂失活高度依赖于温度,并且在升高的反应温度下变得尤为突出。最终,了解失活途径可能有助于弥合Ru和Ir催化剂的活性/稳定性差距,从而切实可行地实现可持续的富含地球的锰配合物。