Enol-functionalized N-heterocyclic carbene lanthanide amide complexes: Synthesis, molecular structures and catalytic activity for addition of amines to carbodiimides

Li, Zhi; Xue, Mingqiang; Yao, Huiqiang; Sun, Hongjian; Zhang, Yong; Shen, Qi

doi:10.1016/j.jorganchem.2012.04.006

Cited by 51 publications

(12 citation statements)

References 43 publications

(38 reference statements)

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“…Only a few examples of lanthanide complexes containing enolate-based ligands have been structurally characterized. A common feature of previously reported complexes is that the enolate moieties are part of more complex chelating ligands. − The CC double-bond lengths within the enolate fragments range from 1.33 to 1.37 Å. − These previously reported bond lengths are close to the values observed herein. A series of structurally characterized lanthanide(III) aryloxides provides Ln–O bond length comparisons with some of the complexes reported herein.…”

Section: Resultssupporting

confidence: 84%

Evaluation of Volatility and Thermal Stability in Monomeric and Dimeric Lanthanide(III) Complexes Containing Enaminolate Ligands

et al. 2021

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Section: Resultssupporting

confidence: 84%

Evaluation of Volatility and Thermal Stability in Monomeric and Dimeric Lanthanide(III) Complexes Containing Enaminolate Ligands

et al. 2021

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“…Ubiquitous N-heterocyclic carbenes are also suitable to stabilize amido lanthanide precatalysts [L 2 Ln{N(SiMe 3 ) 2 }] (L = 4-OMe-C 6 H 4 C 2 O(CNCHCHN-iPr), Ln = Y, Nd, Sm, Yb) (0.5 mol%) and these are also active under solvent-free conditions. 61 In comparison with the lanthanide alkyl and amide complexes used in the previously described studies, lanthanide aryloxides are simpler to obtain and they are less sensitive to air. For example, Shen's group investigated the reactivity of Ln-aryloxide species in the guanylation reaction (0.5-1 mol% of catalyst loading).…”

Section: Catalystsmentioning

confidence: 99%

Guanidines: from classical approaches to efficient catalytic syntheses

et al. 2014

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From organosuperbases capable of base-catalyzing organic reactions, through versatile 'ligand-sets' for use in coordination chemistry, to fundamental entities in medicinal chemistry, guanidines are amongst the most interesting, attractive, valuable, and versatile organic molecules. Since the discovery of these compounds, synthetic chemists have developed new methodologies that are mainly based on multi-step and stoichiometric reactions. Despite the fact that these methodologies are still being used by the interested scientific and industrial communities, drawbacks such as the poor availability of precursors, low yields, and use and production of undesirable substances highlight the need for safe, simple and efficient syntheses of these entities. This review focuses on the metal-mediated catalytic addition of amines to carbodiimides as an atom-economical alternative to the classical synthesis.

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“…The insertion of E-H bonds (E = N, P, S) across heterocumulene systems, such as carbodiimides, isocyanates and isothiocyanates represents and atom-economic route for the generation of a variety of organic synthons, such as guanidines and phosphaguanidines. Therefore this process has been widely studied over the past decade using lanthanide catalysts [100][101][102][103][104][105][106]. However, only recently Eisen et al, have reported the application of a thorium catalyst for this type of atom-economic catalytic transformation [107].…”

Section: Insertion Of Nucleophilic E-h (E = N P S) Bonds Into Hetermentioning

confidence: 99%

Catalytic Organic Transformations Mediated by Actinide Complexes

2015

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This review article presents the development of organoactinides and actinide coordination complexes as catalysts for homogeneous organic transformations. This chapter introduces the basic principles of actinide catalysis and deals with the historic development of actinide complexes in catalytic processes. The application of organoactinides in homogeneous catalysis is exemplified in the hydroelementation reactions, such as the hydroamination, hydrosilylation, hydroalkoxylation and hydrothiolation of alkynes. Additionally, the use of actinide coordination complexes for the catalytic polymerization of α-olefins and the ring opening polymerization of cyclic esters is presented. The last part of this review article highlights novel catalytic transformations mediated by actinide compounds and gives an outlook to the further potential of this field.

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Enol-functionalized N-heterocyclic carbene lanthanide amide complexes: Synthesis, molecular structures and catalytic activity for addition of amines to carbodiimides

Cited by 51 publications

References 43 publications

Evaluation of Volatility and Thermal Stability in Monomeric and Dimeric Lanthanide(III) Complexes Containing Enaminolate Ligands

Evaluation of Volatility and Thermal Stability in Monomeric and Dimeric Lanthanide(III) Complexes Containing Enaminolate Ligands

Guanidines: from classical approaches to efficient catalytic syntheses

Catalytic Organic Transformations Mediated by Actinide Complexes

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