Asymmetric Hydrogenation of α- and β-Enamido Phosphonates: Rhodium(I)/Monodentate Phosphoramidite Catalyst
作者:Jinzhu Zhang、Yang Li、Zheng Wang、Kuiling Ding
DOI:10.1002/anie.201104912
日期:2011.12.2
High efficiency and enantioselectivity have been achieved in the RhI‐catalyzed asymmetric hydrogenation of α‐ and β‐enamido phosphonates using a monophosphoramidite as the chiral ligand (see scheme; cod=1,5‐cyclooctadiene), thus affording the optically active amino phosphonates with a turnover frequency of up to 1800 h−1 and high ee values.
使用单亚磷酰胺作为手性配体,在Rh I催化的α-和β-氨基膦酸酯的不对称氢化中实现了高效率和对映选择性(参见方案; cod = 1,5-环辛二烯),从而提供了光学活性的氨基膦酸酯具有高达1800 h -1的周转频率和高ee 值。