Synthesis and Applications of (Pyridyl)imine Fe(II) Complexes as Catalysts in Transfer Hydrogenation of Ketones
作者:Robert T. Kumah、Paranthaman Vijayan、Stephen O. Ojwach
DOI:10.1007/s10562-020-03311-y
日期:2021.2
solid-state structure of complex Fe4 showed that the Fe atom contains three units of bidentate bound ligand L4 to form a six-coordinate cationic compound. The Fe(II) complexes were evaluated as catalysts in asymmetric transfer hydrogenation of ketones reactions and showed moderate catalytic activities with low enantioselectivity. Catalytic activities of the respective complexes were regulated by the nature
手性(吡啶基)亚胺 Fe(II) 配合物,[Fe(L1)3]2+[PF6−]2, (Fe1), [Fe(L2)3]2+[PF6−]2, (Fe2), [ Fe(L3)3]2+[PF6-]2(Fe3)和[Fe(L4)3]2+[PF6-]2(Fe4)是通过合成子(S-)-1-苯基-的反应合成的N-(吡啶-2-基)乙胺)乙胺(L1),(R-)-1-苯基-N-(吡啶-2-基)乙胺)乙胺(L2),(S)-1-苯基-N -(吡啶-2-基亚甲基)乙胺(L3)和(S)-1-苯基-N-(吡啶-2-基亚甲基)乙胺(L4)与FeCl2盐。络合物Fe4的固态结构表明,Fe原子含有三个单元的双齿结合配体L4,形成六配位阳离子化合物。Fe(II) 配合物被评估为酮反应不对称转移氢化的催化剂,并显示出中等的催化活性和低对映选择性。各个配合物的催化活性受金属配合物的性质、酮底物和反应条件的调节。汞和亚化学计量中毒实验暗示可能形成活性