<i>O</i>-Allylated Pudovik and Passerini Adducts as Versatile Scaffolds for Product Diversification
作者:Mansour Dolé Kerim、Tania Katsina、Martin Cattoen、Nicolas Fincias、Stellios Arseniyadis、Laurent El Kaïm
DOI:10.1021/acs.joc.0c01721
日期:2020.10.2
The palladium-catalyzed O-allylation of α-hydroxyphosphonates and α-hydroxyamides obtained from Pudovik and Passerini multicomponent reactions has allowed interesting and highly straightforward access to a variety of building blocks for product diversification. These post-functionalizations include a selective base- or ruthenium hydride-mediated isomerization/Claisen rearrangement cascade and a ring-closing
characterized by 1H NMR spectroscopic analyses. The structures of complexes 2, 3, 4, and 6 were determined by single‐crystal X‐ray analyses. Study of the catalytic activities of the complexes showed that these rare earth metal amido complexes were excellent catalysts for hydrophosphonylations of aldehydes and unactivated ketones. The catalyzed reactions between diethylphosphite and aldehydes in the presence
通过甲硅烷基胺消除反应制备了一系列带有亚甲基连接的吡咯基-酰胺基配体的稀土金属酰胺配合物,在无溶剂条件下,液态底物在醛和未活化酮的氢膦酰化反应中显示出很高的催化活性。的治疗[(ME 3 Si)的2 N] 3 LN(μ-Cl)的锂(THF)3与2-(2,6--ME 2 ç 6 ħ 3 NHCH 2)C 4 H ^ 3 NH(1,1个当量)在甲苯,得到相应的式三价稀土金属酰胺(μ-η 5:η 1):η 1-2-[(2,6-Me 2 C 6 H 3)NCH 2 ](C 4 H 3 N)LnN(SiMe 3)2 } 2 [Ln = Y(2),Nd(3),Sm(4),Dy(5),Yb(6)],产量适中。所有化合物均通过光谱法和元素分析充分表征。钇配合物的特征还在于1 H NMR光谱分析。复合物的结构 2,3,4,和6由单晶X射线分析确定。配合物催化活性的研究表明,这些稀土金属酰胺配合物是醛和未活化
Synthesis, structure, and catalytic activity of novel trinuclear rare-earth metal amido complexes incorporating μ–η<sup>5</sup>:η<sup>1</sup>bonding indolyl and μ<sub>3</sub>-oxo groups
temperatures of 75–80 °C afforded the novel trinuclear rare-earth metal amido complexes incorporating the indolyl ligand in μ–η5:η1 bonding modes and a μ3-O group, which is believed to originate from cleavage of the THF ring based on experimental results. Reactions of 2-(1H-indol-3-yl)-N-((1-methyl-1H-pyrrol-2-yl)methylene)ethanamine with rare-earth metal(III) amides [(Me3Si)2N]3REIII(μ-Cl)Li(THF)3 (RE = Yb
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