Enantioselective Hydrogenation of Ketones using Different Metal Complexes with a Chiral PNP Pincer Ligand
作者:Marcel Garbe、Zhihong Wei、Bianca Tannert、Anke Spannenberg、Haijun Jiao、Stephan Bachmann、Michelangelo Scalone、Kathrin Junge、Matthias Beller
DOI:10.1002/adsc.201801511
日期:2019.4.16
The synthesis of different metal pincer complexes coordinating to the chiral PNP ligand bis(2‐((2R,5R)‐2,5‐dimethyl‐phospholanoethyl))amine is described in detail. The characterized complexes with Mn, Fe, Re and Ru as metal centers showed good activities regarding the reduction of several prochiral ketones. Comparing these catalysts, the non‐noble metal complexes produced best selectivities not only for
详细描述了与手性PNP配体bis(2-(((2 R,5 R)-2,5-二甲基-膦酰基乙基))胺配位的不同金属钳形配合物的合成。以锰,铁,Re和钌为金属中心的特征配合物在还原几种前手性酮方面表现出良好的活性。与这些催化剂相比,非贵金属络合物不仅对芳族底物具有最佳选择性,而且对不同种类的脂族底物也具有最佳选择性,从而导致对映选择性高达99% ee。理论研究阐明了机理并合理化了选择性。