Bis(phosphinite) with C2-Symmetric Axis; Effects on the Ruthenium(II)- Catalyzed Asymmetric Transfer Hydrogenation of Acetophenone Derivatives
作者:Murat Aydemir、Feyyaz Durap、Cezmi Kayan、Akin Baysal、Yılmaz Turgut
DOI:10.1055/s-0032-1317505
日期:——
ruthenium catalyst systems generated in situ from [Ru(η6-p-cymene)(μ-Cl)Cl]2 complex and chiral C 2-symmetric bis(phosphinite) ligands based on amino alcohol derivatives were employed in the asymmetric transfer hydrogenation of aromatic ketones to give the corresponding optically active alcohols in high yield. The best results were obtained in the [Ru(η6-p-cymene)(μ-Cl)Cl]2 and (2S)-2-[benzyl(2-benzyl[(
由 [Ru(η6-p-cymene)(μ-Cl)Cl]2 配合物和基于氨基醇衍生物的手性 C 2-对称双(亚膦酸酯)配体原位生成的手性钌催化剂体系用于不对称转移氢化芳香酮以高产率得到相应的旋光醇。在 [Ru(η6-p-cymene)(μ-Cl)Cl]2 和 (2S)-2-[benzyl(2-benzyl[(2S)-1-[(diphenylphosphanyl)oxy] ]-3-苯基丙烷-2-基]氨基}乙基)氨基]-3-苯基丙基二苯基次膦酸酯或(2R)-2-[苄基(2-苄基[(2R)-1-[(二苯基膦基)氧基]- 3-苯基丙-2-基]氨基}乙基)氨基]-3-苯基丙基二苯基亚膦酸酯催化体系,其对映选择性高达93% ee和99%转化率。