Epoxidation of cis-cyclooctene using diamine bis(phenolate) vanadium, molybdenum and tungsten complexes as catalysts

Madeira, Filipe; Barroso, Sónia; Namorado, Sónia; Reis, Patrícia M.; Royo, Beatriz; Martins, Ana M.

doi:10.1016/j.ica.2011.10.071

Cited by 58 publications

(28 citation statements)

References 58 publications

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“…TBHP, as reported in the literatures [46][47][48][49]. acetonitrile, may improve its reactivity compared to aqueous H 2 O 2 [49]. Oxidation processes with aqueous H 2 O 2 consumed longer time (8-10.5 h) compared to TBHP (2-3.5 h) in the same conditions (molar ratio of substrate:catalyst = 100:1).…”

Section: Oxidant Effectmentioning

confidence: 62%

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Catalytic potentials of homodioxo-bimetallic dihydrazone complexes of uranium and molybdenum in a homogeneous oxidation of alkenes

Adam

2015

Monatsh Chem

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The catalytic potentials of dioxomolybdenum(VI) and dioxouranium(VI) homobimetallic bis-ONO tridentate (2-hydroxy-1-benzylidene)malonyl-, succinyl-, and terephthalo-dihydrazone complexes were studied in homogeneous oxidation processes of various aliphatic and cyclic alkenes using aqueous H 2 O 2 or TBHP (tert-butyl hydroperoxide) as a terminal oxidant. The catalytic potentiality is quantitative and highly selective to afford the corresponding oxide product with Mo VI O 2 complexes which is 5 times more than that with U VI O 2 complexes using aqueous H 2 O 2 or TBHP. Effect of various solvents and temperatures was investigated in the oxidation of 1,2cyclooctene catalyzed by Mo VI O 2 complexes using aqueous H 2 O 2 results that the most favored solvent is acetonitrile at an optimal temperature is 70°C. The mechanistic pathway was tentatively described and discussed. Graphical abstractKeywords Dihydrazones Á Dioxomolybdenum(VI) Á Dioxouranium(VI) Á Catalytic oxidation Á Alkenes Electronic supplementary material The online version of this article (

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Section: Oxidant Effectmentioning

confidence: 62%

“…TBHP, as reported in the literatures [46][47][48][49]. TBHP, as reported in the literatures [46][47][48][49].…”

Section: Oxidant Effectmentioning

confidence: 74%

Catalytic potentials of homodioxo-bimetallic dihydrazone complexes of uranium and molybdenum in a homogeneous oxidation of alkenes

Adam

2015

Monatsh Chem

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“…The [46], oxodiperoxo complexes of the type [MO(O 2 ) 2 (L)] supported on mesoporous SBA-15 materials [47], and the hybrid materials [MO 3 (2,2 0 -bipy)]ÁnH 2 O (n = 0-2) [32]. As mentioned in the introduction, when aqueous H 2 O 2 is used as the oxidant, the latter materials are converted to the partially soluble oxodiperoxo complexes [MO(O 2 ) 2 (2,2 0 -bipy)], which are the active species responsible for the epoxidation reaction in homogeneous phase.…”

Section: Epoxidation Of Cis-cyclooctenementioning

confidence: 99%

Metal oxide-triazole hybrids as heterogeneous or reaction-induced self-separating catalysts

Amarante

Neves

Valente

et al. 2016

Journal of Catalysis

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“…Some molybdates show antiviral, antitumoral or antibiotic activity [5][6][7]. They are also known as efficient catalysts for the oxidation of various organic compounds with different oxygen donors like ROOH [8][9][10][11][12][13][14][15][16][17][18][19][20] and H 2 O 2 [21][22][23][24][25][26][27][28][29]. Molybdenum(VI) dioxo or oxodiperoxo compounds are commonly encountered in oxidation catalysis.…”

Section: Introductionmentioning

confidence: 99%

Molybdenum Complexes as Catalysts for the Oxidation of Cycloalkanes with Molecular Oxygen

et al. 2016

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A group of new polymolybdates was synthesized and tested in the catalytic oxidation of cycloalkanes. Investigated compounds exhibit broad structural diversity including polymolybdates with isolated anionic clusters (0-dim), polymeric anions (1-dim), Mo-O layers (2-dim) as well as hexagonal and orthorhombic molybdenum oxides (3-dim). All studied molybdenum complexes were found to be active in the reaction conditions yielding ketones and alcohols as main products. In the case of layered compounds (2-dim), dicarboxylic acid was detected in the mixture of reaction products. The structure of investigated molybdenum compounds was shown to have influence on yields and selectivities of the investigated reactions. Anionic layers separation (in 2-dim materials) as well as type and charge of organic cations present in the compounds are prime examples of structural factors influencing the oxidation reactions efficiencies. On the basis of obtained results and literature reports a mechanism for the oxidation of cycloalkanes by polymolybdates has been proposed. Graphical Abstract

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Epoxidation of cis-cyclooctene using diamine bis(phenolate) vanadium, molybdenum and tungsten complexes as catalysts

Cited by 58 publications

References 58 publications

Catalytic potentials of homodioxo-bimetallic dihydrazone complexes of uranium and molybdenum in a homogeneous oxidation of alkenes

Catalytic potentials of homodioxo-bimetallic dihydrazone complexes of uranium and molybdenum in a homogeneous oxidation of alkenes

Metal oxide-triazole hybrids as heterogeneous or reaction-induced self-separating catalysts

Molybdenum Complexes as Catalysts for the Oxidation of Cycloalkanes with Molecular Oxygen

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