Lanthanide anilido complexes: synthesis, characterization, and use as highly efficient catalysts for hydrophosphonylation of aldehydes and unactivated ketones
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。
<i>n</i>-BuLi as a Highly Efficient Precatalyst for Hydrophosphonylation of Aldehydes and Unactivated Ketones
作者:Chengwei Liu、Yu Zhang、Qinqin Qian、Dan Yuan、Yingming Yao
DOI:10.1021/ol5030713
日期:2014.12.5
as highly efficient precatalysts for the hydrophosphonylation reactions of aldehydes and unactivated ketones with dialkyl phosphite under mild conditions. For ketone substrates, a reversible reaction was observed, and the influence of catalyst loading and reaction temperature on the reaction equilibrium was studied in detail. Overall, the hydrophosphonylation reactions catalyzed by 0.1 mol % n-BuLi
Synthesis and characterization of amidate rare-earth metal amides and their catalytic activities toward hydrophosphonylation of aldehydes and unactivated ketones
作者:Lu Zhao、Hao Ding、Bei Zhao、Chengrong Lu、Yingming Yao
DOI:10.1016/j.poly.2014.04.018
日期:2014.11
by NMR spectroscopic analyses. Investigation on the catalytic behaviors of amidate rare-earthmetalamides, including two new complexes 1, 2 and three known amidate divalent rare-earthmetalamidesLn[N(SiMe3)2](μ-O:κ2-L1)(THF)}2 (Ln = Yb (3), Eu (4)), and Eu2[N(SiMe3)2]2(μ-O:κ2-L2)2(THF)3 (L2 = C6H5C(O)NC6H3(Me)2) (5), revealed that all complexes exhibited high catalytic activities toward the hydrophosphonylation
两种新型酰胺化稀土类金属酰胺LN [N(森达3)2 ](κ 2 -L 1)2(THF)(L 1 = C 6 H ^ 5 C(O)NC 6 H ^ 3(我PR)2) (Ln = Yb(1),Y(2))通过苯甲酰胺配体HL 1与Ln [N(SiMe 3)2 ] 3的简单甲硅烷基胺消除反应制备。在60°C下于四氢呋喃中溶解。这些配合物通过元素和单晶X射线衍射分析得到了很好的表征,钇配合物2也通过NMR光谱分析得到了表征。调查酰胺化稀土类金属氨化的催化行为,包括两个新的复合物1,2和三种已知的酰胺化物二价稀土金属酰胺LN [N(森达3)2 ](μ -O:κ 2 -L 1)(THF)} 2(Ln = Yb(3),Eu(4))和Eu 2 [N(SiMe 3)2 ] 2(μ -O:κ 2 -L 2)2(THF)3(L 2 = C 6 H ^ 5 C(O)NC 6 H ^ 3(Me)的2)(5),表