Chiral C2-symmetric η6-p-cymene-Ru(II)-phosphinite complexes: Synthesis and catalytic activity in asymmetric reduction of aromatic, methyl alkyl and alkyl/aryl ketones
作者:Duygu Elma Karakaş、Murat Aydemir、Feyyaz Durap、Akın Baysal
DOI:10.1016/j.ica.2017.11.044
日期:2018.2
Abstract Chiral C2-symmetric bis(phosphinite) ligands and their binuclear ruthenium(II) complexes have been synthesized and used as catalysts in the ruthenium-catalyzed asymmetric transfer hydrogenation of aromatic, methyl alkyl and alkyl/aryl ketones using 2-propanol as both the hydrogen source and solvent in the presence of KOH. Under optimized conditions, all complexes showed high catalytic activity
摘要合成了手性C2-对称双亚膦酸酯配体及其双核钌(II)配合物,并将其用作钌催化的芳族,甲基烷基和烷基/芳基酮不对称转移加氢反应的催化剂,该反应使用2-丙醇作为催化剂。氢源和KOH存在下的溶剂。在最佳条件下,所有配合物在将各种酮还原为相应的手性仲醇中均表现出高催化活性。获得具有高转化率(99%)和中等至良好对映选择性(82%ee)的产物。此外,通过多核NMR光谱,FT-IR光谱,LC / MS-MS和元素分析对C2对称的双(次膦酸酯)配体及其双核钌(II)配合物进行了表征。