Chiral Salen Mn(III) Complex Axial Coordination Immobilized on Diamine Modified Alspp and Highly Efficient Large-Scale Epoxidation of Olefins as a Recoverable Catalyst

Jia, Ziyong; Fu, Xiangkai; Luo, Yunfei; Zhang, Huaizhi; Huang, Xuemei; Wu, Hao

doi:10.1007/s10904-011-9571-x

Cited by 6 publications

(2 citation statements)

References 36 publications

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“…This is in agreement with the presence of a Mn(III) species stabilized as a salen complex as reported previously in the literature. 32 Scheme 2 : Mechanosynthesis of Mn(III) salen complex 7…”

Section: Synthesis Of the Metal-complexesmentioning

confidence: 99%

Synthesis, Characterisation and Cytotoxic Activity Evaluation of New Metalsalen Complexes Based on the 1,2-bicyclo[2.2.2]octane Bridge

Milbeo¹,

Quintin²,

Moulat³

et al. 2020

Preprint

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Diaminobicyclo[2.2.2]octane was used as starting material for the preparation, in solution or in a ball-mill, of a salen ligand. Five metal salen complexes were prepared in high yield and their cytotoxic activities were evaluated against HCT116 cell lines. Original manganese salen complex displayed the highest activity with a potency 16 fold higher than the one of cisplatin, demonstrating the benefit of the bridging backbone, compared to other salen systems. An alternative preparation route for this complex by mechanochemistry was also performed.<br>

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Section: Synthesis Of the Metal-complexesmentioning

confidence: 99%

Synthesis, Characterisation and Cytotoxic Activity Evaluation of New Metalsalen Complexes Based on the 1,2-bicyclo[2.2.2]octane Bridge

Milbeo¹,

Quintin²,

Moulat³

et al. 2020

Preprint

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“…39 The Jacobsen's catalyst serves as an example of the high levels of catalytic efficiency and stereoselectivity achieved by this class of transition metal complexes. This has triggered further developments in asymmetric catalysis, including the development of novel chiral Mn(salen) complexes, 39 the immobilisation of such complexes onto different supporting materials 21,22,28,37 and the rationalisation of the catalytic cycle of this family of compounds using both theoretical and experimental methods. 14,32,35,43 In the presence of a terminal oxidant, Mn(salen) complexes are typically oxidised to their oxo-Mn(salen) analogues.…”

Section: Introductionmentioning

confidence: 99%

Principal component analysis of Mn(salen) catalysts

Teixeira

Mosquera

Melo

et al. 2014

Phys. Chem. Chem. Phys.

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The theoretical study of Mn(salen) catalysts has been traditionally performed under the assumption that Mn(acacen') (acacen' = 3,3'-(ethane-1,2-diylbis(azanylylidene))bis(prop-1-en-olate)) is an appropriate surrogate for the larger Mn(salen) complexes. In this work, the geometry and the electronic structure of several Mn(salen) and Mn(acacen') model complexes were studied using Density Functional Theory (DFT) at diverse levels of approximation, with the aim of understanding the effects of truncation, metal oxidation, axial coordination, substitution on the aromatic rings of the salen ligand and chirality of the diimine bridge, as well as the choice of the density functional and basis set. To achieve this goal, geometric and structural data, obtained from these calculations, were subjected to Principal Component Analysis (PCA) and PCA with orthogonal rotation of the components (rPCA). The results show the choice of basis set to be of paramount importance, accounting for up to 30% of the variance in the data, while the differences between salen and acacen' complexes account for about 9% of the variance in the data, and are mostly related to the conformation of the salen/acacen' ligand around the metal centre. Variations in the spin state and oxidation state of the metal centre also account for large fractions of the total variance (up to 10% and 9%, respectively). Other effects, such as the nature of the diimine bridge or the presence of an alkyl substituent in the 3,3 and 5,5 positions of the aldehyde moiety, were found to be less important in terms of explaining the variance within the data set. A matrix of discriminants was compiled using the loadings of the principal and rotated components that best performed in the classification of the entries in the data. The scores obtained from its application to the data set were used as independent variables for devising linear models of different properties, with satisfactory prediction capabilities.

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Grafting of the new unsymmetrical salamo complex of Mn (II) on MCM-41 and its use as a heterogeneous catalyst for the epoxidation of alkenes in the presence of H2O2 as an oxidant

Kandi,

Zarei,

Nikmaram

et al. 2024

Chem. Pap.

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Chiral Salen Mn(III) Complex Axial Coordination Immobilized on Diamine Modified Alspp and Highly Efficient Large-Scale Epoxidation of Olefins as a Recoverable Catalyst

Cited by 6 publications

References 36 publications

Synthesis, Characterisation and Cytotoxic Activity Evaluation of New Metalsalen Complexes Based on the 1,2-bicyclo[2.2.2]octane Bridge

Synthesis, Characterisation and Cytotoxic Activity Evaluation of New Metalsalen Complexes Based on the 1,2-bicyclo[2.2.2]octane Bridge

Principal component analysis of Mn(salen) catalysts

Grafting of the new unsymmetrical salamo complex of Mn (II) on MCM-41 and its use as a heterogeneous catalyst for the epoxidation of alkenes in the presence of H2O2 as an oxidant

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