Epoxidation of alkenes with molecular oxygen and isobutyraldehyde catalyzed by immobilized vitamin B12 within Al-MCM-41

Farzaneh, Faezeh; Tayebi, Leila; Ghandi, Mehdi

doi:10.1007/s11144-007-5101-9

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…Two major pathways involving either a high valent metal-peroxo/ oxo species or free radical intermediates have been proposed for the oxidation of styrene by O 2 [30][31][32]. The mechanistic model of Figueiredo [33], Ramaraj [34] and Ghandi [35] can be extended for our system. The proposed mechanism for the aerobic epoxidation of styrene is described in Scheme 2.…”

Section: Electronic Effect and Catalytic Propertiesmentioning

confidence: 92%

Synthesis, characterization and catalytic properties of heterogeneous iron(III) tetradentate Schiff base complexes for the aerobic epoxidation of styrene

Yang

Guan

Qiu

et al. 2009

Transition Met Chem

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A series of hybrid mesoporous SBA-15 materials containing four iron(III) Schiff base complexes of the type [FeL x (NO 3 )] (x = 4-7, L = N,N 0 -bis(salicylidene) ethylenediamine, N,N 0 -bis(salicylidene)diethylenetriamine, N,N 0 -bis(salicylidene)o-phenylenediamine, N,N 0 -bis(3-nitrosalicylidene)ethylenediamine) was synthesized by a postgrafting route. The XRD, N 2 adsorption/desorption and TEM measurements confirmed the structural integrity of the mesoporous hosts, and the spectroscopic characterization techniques (FT-IR, UV-vis spectroscopy, 1 H NMR) confirmed the ligands and the successful anchoring of iron(III) Schiff base complexes over the modified mesoporous support. Quantification of the supported ligand and metal was carried out by TG/DSC and ICP-AES techniques. The catalyst FeL 7 -SBA resulting from N,N 0 -bis(3-nitro-salicylidene)ethylenediamine) ligand was considerably active for the aerobic epoxidation of styrene, in which the highest conversion of styrene reached 83.6%, and the selectivity to styrene oxide was 83.0%. Moreover, it was also found that the catalytic activity increases with the decrease in the electron-donating ability of the Schiff bases, and the selectivity varies according to the types of substituents in the ligands.

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Section: Electronic Effect and Catalytic Propertiesmentioning

confidence: 92%

Synthesis, characterization and catalytic properties of heterogeneous iron(III) tetradentate Schiff base complexes for the aerobic epoxidation of styrene

Yang

Guan

Qiu

et al. 2009

Transition Met Chem

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“…[16] For example, MOFs could be directly used as heterogeneous catalysts (the active site was either the metal or organic ligands in the structure of MOFs). Farzaneh and Mortazavi [17] explored the alkylation of toluene with benzyl bromide over Zn(BTC). Chung et al [18] investigated the Friedel-Crafts acylation of p-xylene with benzyl chloride over sulfonated UiO-66 catalysts.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fe@Cu‐BDC and its catalytic performance for benzene hydroxylation

Liu

et al. 2018

Applied Organom Chemis

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Novel Fe@Cu‐BDC catalysts were synthesized by adsorbing various contents of Fe ions on the surface and into the channels of Cu‐BDC support through an in situ method under ultrasonication. The structure of the catalysts was characterized using X‐ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, energy‐dispersive X‐ray spectrometry, X‐ray photoelectron spectroscopy and thermogravimetric analysis. The catalytic activity of catalysts for benzene hydroxylation was evaluated. The results showed that the Fe@Cu‐BDC catalysts had favorable catalytic activity for benzene hydroxylation. The yield of products can reach ca 37% and the selectivity of phenol can reach ca 62% over the 6% Fe@Cu‐BDC catalyst at 60°C in a reaction time of 75 min. Furthermore, the contents of Fe and solvent played a key role in benzene hydroxylation. After the reaction, the catalyst could be easily separated from the reaction mixture by centrifugation and reused for five times without significant decrease in activity.

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Stilbene Chemical Reactions

Likhtenshtein

2009

Stilbenes

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Epoxidation of alkenes with molecular oxygen and isobutyraldehyde catalyzed by immobilized vitamin B12 within Al-MCM-41

Cited by 4 publications

References 19 publications

Synthesis, characterization and catalytic properties of heterogeneous iron(III) tetradentate Schiff base complexes for the aerobic epoxidation of styrene

Synthesis, characterization and catalytic properties of heterogeneous iron(III) tetradentate Schiff base complexes for the aerobic epoxidation of styrene

Preparation of Fe@Cu‐BDC and its catalytic performance for benzene hydroxylation

Stilbene Chemical Reactions

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