Manganese(II) complexes of imidazole based-acetamide as homogeneous and heterogenised catalysts for alkene epoxidation with H2O2

Serafimidou, Alexia; Stamatis, Aggelos; Louloudi, Maria

doi:10.1016/j.catcom.2007.05.015

Cited by 22 publications

(9 citation statements)

References 22 publications

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“…These types are already examined since catalysts pertaining to alkene epoxidation along with H 2 O 2 within the profile of ammonium acetate since the item. Our own information confirmed how the homogeneous and the backed methods can easily get over the reasonably competitive H 2 O 2 dis-mutation, using only two fold H 2 O 2 regarding substrate, favoring fruitful alkene epoxidations to some important magnitude [43]. It was stated that a Schiff base ligand (3-aminopropyl) imidazole along with salicylaldehyde that coordinate with Zn(II), Cu(II) and Ag(I) center and their X-ray crystal structure of these complexes were obtained.…”

Section: Mn +2 Complexes With Nicotinic Acid:-supporting

confidence: 64%

Cu AND Mn COMPLEXES OF NICOTINIC ACID AND IMIDAZOLE: A CURRENT REVIEW.

Khan¹,

Kanwal²,

Iqbal³

et al. 2017

IJAR

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Section: Mn +2 Complexes With Nicotinic Acid:-supporting

confidence: 64%

Cu AND Mn COMPLEXES OF NICOTINIC ACID AND IMIDAZOLE: A CURRENT REVIEW.

Khan¹,

Kanwal²,

Iqbal³

et al. 2017

IJAR

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“…It could be a manganyl species containing fragment Mn=O. High-valent metal-oxo species of such type have been previously proposed for various oxidation processes with the participation of manganese complexes [18,73,80,[102][103][104][105][106][107][108] including Mn-TACN derivatives [109][110][111][112]. In some works, the role of catalytically active bis(l-carboxylato)-Mn 2 III complex has been demonstrated [113].…”

Section: Resultsmentioning

confidence: 98%

Oxidation of Reactive Alcohols with Hydrogen Peroxide Catalyzed by Manganese Complexes

et al. 2010

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Two manganese-containing catalysts have been employed in the oxidation with hydrogen peroxide of two reactive alcohols (1-phenylethanol and glycerol): soluble catalyst [LMn(l-O) 3 MnL](PF 6 ) 2 (1a) and heterogenized catalyst [LMn(l-O) 3 MnL] 2 [SiW 12 O 40 ] (1b) (L is 1 ,4,4, TMTACN). Oxidation of 1-phenylethanol catalyzed by 1a in acetonitrile solution proceeds at room temperature in the presence of a small amount of oxalic acid; the turnover number attains 15,000 after 3 h. It has been proposed on the basis of the kinetic study that an oxidizing species is a manganyl species containing fragment ''Mn=O'' rather that hydroxyl radical. This species reacts competitively with the alcohol, acetonitrile and hydrogen peroxide. In the case of 1b dependences of the initial rates of acetophenone accumulation on concentration of the alcohol and amount of 1b have plateau. Both homogeneous and heterogeneous catalysts are efficient in the oxidation of glycerol to produce dihydroxyacetone (DHA) as the main product. The oxidation catalyzed by 1a is one of the first examples of the glycerol oxidation by a catalytic homogeneous system. The yield of valuable products attained 45%. The oxidation of DHA in the absence of glycerol afforded mainly glycolic acid in yield 60% based on the starting DHA. The oxidation on 1b represents the first example of the glycerol transformation catalyzed by a heterogenized metal complex. Under certain conditions yields of products of deeper oxidation (glyceric, glycolic and hydroxypyruvic acids) are somewhat higher than the yield of dihydroxyacetone. Special experiments demonstrated that no leaching of active species occurs from catalyst 1b to the solution and that this catalyst can be re-used at least four times without substantial loss of activity.

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“…Access to a variety of epoxides has largely been successful due to the remarkable catalytic activity of transition metal complexes, which have a unique ability to bring the alkene substrate and the oxygen source within the coordination sphere of the metal leaving to a facial transfer of oxygen atom to the carbon-carbon double bond. [53][54][55][56] During the past two decades, metalloporphyrins have been widely applied for epoxidation of olefins to give epoxides with high regio-, shape-and stereoselectivity since the leading works of Groves and co-workers by using iodosylbenzene (PhIO) as oxygen atom donor. 57 The activation of the natural oxidant, O 2 , with metalloporphyrins has also been realized.…”

Section: Epoxidation Of Olefinsmentioning

confidence: 99%

Biomimetic Homogeneous Oxidation Catalyzed by Metalloporphyrins with Green Oxidants

Ji¹,

Zhou²

2010

Biomimetics Learning From Nature

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Cytochrome P-450 mono-oxygenase enzymes play a key role in the oxidative transformation in living systems. As one kind of cytochrome P-450 models, metalloporphyrins have been widely used in selective oxygenation of hydrocarbons under mild conditions. The chapter focuses on reviewing the biomimetic homogeneous oxidation of organic compounds catalyzed by metalloporphyrins with green oxidants such as dioxygen or hydrogen peroxide, in which the oxidized substrates include alkanes, olefins, alcohols, aldehydes, sulfides etc. The mechanisms for the oxidation of different substrates were also described. We can assume that the coming decade is going to be dedicated to the development of metalloporphyrins biomimetic catalyst in petrochemical and fine chemical industries.

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Manganese(II) complexes of imidazole based-acetamide as homogeneous and heterogenised catalysts for alkene epoxidation with H2O2

Cited by 22 publications

References 22 publications

Cu AND Mn COMPLEXES OF NICOTINIC ACID AND IMIDAZOLE: A CURRENT REVIEW.

Cu AND Mn COMPLEXES OF NICOTINIC ACID AND IMIDAZOLE: A CURRENT REVIEW.

Oxidation of Reactive Alcohols with Hydrogen Peroxide Catalyzed by Manganese Complexes

Biomimetic Homogeneous Oxidation Catalyzed by Metalloporphyrins with Green Oxidants

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