Manganese(I)-Catalyzed Enantioselective Hydrogenation of Ketones Using a Defined Chiral PNP Pincer Ligand
作者:Marcel Garbe、Kathrin Junge、Svenja Walker、Zhihong Wei、Haijun Jiao、Anke Spannenberg、Stephan Bachmann、Michelangelo Scalone、Matthias Beller
DOI:10.1002/anie.201705471
日期:2017.9.4
A new chiral manganese PNP pincer complex is described. The asymmetric hydrogenation of several prochiral ketones with molecular hydrogen in the presence of this complex proceeds under mild conditions (30–40 °C, 4 h, 30 bar H2). Besides high catalytic activity for aromatic substrates, aliphatic ketones are hydrogenated with remarkable selectivity (e.r. up to 92:8). DFT calculations support an outer
描述了一种新的手性锰PNP钳复合物。在温和的条件下(30–40°C,4 h,30 bar H 2),在这种配合物的存在下,几种前手性酮与分子氢的不对称氢化反应。除了对芳族底物具有高催化活性外,脂族酮还具有显着的选择性(高达92:8)氢化。DFT计算支持外球氢化机理以及实验确定的立体化学。