Rare-earth metal amido complexes supported by bridged bis(β-diketiminato) ligand as efficient catalysts for hydrophosphonylation of aldehydes and ketones
A series of rare-earth metal amides supported by a cyclohexyl-linked bis(β-diketiminato) ligand were synthesized, and their catalytic activities for hydrophosphonylation of aldehydes and ketones were developed. Reaction of [(Me3Si)2N]3RE(µ-Cl)Li(THF)3 with the cyclohexyl-linked bis(β-diketimine) H2L (1) (L = Cy[NC(Me)CHC(Me)NAr]2, Cy = cyclohexyl, Ar = 2, 6-i-Pr2C6H3) gave the rare-earth metal amides
合成了一系列由环己基连接的双(β-二酮亚胺基)配体负载的稀土金属酰胺,并开发了它们对醛和酮进行氢膦酰化的催化活性。[(Me 3 Si)2 N] 3 RE(µ-Cl)Li(THF)3与环己基连接的双(β-二酮亚胺)H 2 L(1)(L = Cy [NC(Me)CHC (Me)NAr] 2,Cy =环己基,Ar = 2,6 - i -Pr 2 C 6 H 3)得到稀土金属酰胺LREN(SiMe 3)2(RE = Nd(2),Sm(3),Dy(4),Er(5),Y(6))。所有复合物均通过元素,光谱和单晶X射线分析得到充分表征。配合物的催化性能研究表明,在稀土金属酰胺(0.1-1 mol%)的室温下,负载量非常低的情况下,这些配合物对醛和酮的氢膦酰化反应显示出高催化活性。短时间。