Recent Advances in Transition Metal Catalyzed Oxidation of Organic Substrates with Molecular Oxygen

Punniyamurthy, Tharmalingam; Velusamy, Subbarayan; Iqbal, Javed

doi:10.1002/chin.200540244

Cited by 67 publications

(81 citation statements)

References 1 publication

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“…Although these catalysts have showed important catalytic results, their high cost is the main problem. Thus, searching for an alternative to the noble metal catalysts, supported Cu [10], Mn [11], Ni [12], or Co [13] oxides has been proposed in the aerobic oxidations of alcohols. Within these "low cost" catalyst series, the cobalt-based solids have exhibited high catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Performance of Co3O4 on Different Activated Carbon Supports in the Benzyl Alcohol Oxidation

et al. 2017

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Co 3 O 4 particles were supported on a series of activated carbons (G60, CNR, RX3, and RB3). Incipient wetness method was used to prepare these catalysts. The effect of the structural and surface properties of the carbonaceous supports during oxidation of benzyl alcohol was evaluated. The synthetized catalysts were characterized via IR, TEM, TGA/MS, XRD, TPR, AAS, XPS, and N 2 adsorption/desorption isotherm techniques. Co 3 O 4 /G60 and Co 3 O 4 /RX3 catalysts have high activity and selectivity on the oxidation reaction reaching conversions above 90% after 6 h, without the presence of promoters. Catalytic performances show that differences in chemistry of support surface play an important role in activity and suggest that the presence of different ratios of species of cobalt and oxygenated groups on surface in Co 3 O 4 /G60 and Co 3 O 4 /RX3 catalysts, offered a larger effect synergic between both active phase and support increasing their catalytic activity when compared to the other tested catalysts.

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Section: Introductionmentioning

confidence: 99%

Catalytic Performance of Co3O4 on Different Activated Carbon Supports in the Benzyl Alcohol Oxidation

et al. 2017

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“…The metal oxides were prepared by simply dissolving 5.0 g of the chosen metal salt (CuSO 4 Preparation of the metal oxides on the zeolites followed a similar procedure using incipient wetness techniques. The metal salt or combination of salts totaling 5.0 g was first dissolved in dH 2 O with agitation, 5.0 g of powdered zeolite was added and suspended in solution, and 3.0M NaOH was added dropwise until a pH of 10 was achieved.…”

Section: Catalyst Preparation and Characterizationmentioning

confidence: 99%

“…The use of zeolites in many forms has been explored for this reaction in hopes of advantageously directing the reaction through the use of the inherent pore structure of the materials or by incorporating catalysts inside those pores [4]. The so-called "ship-in-a-bottle" approach was widely explored but seldom applied to the oxidation of cyclohexane, or to the use of air as the oxidant; these prior studies used primarily tert-butyl hydroperoxide (TBHP) or similar oxidants as well as solvents [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Cyclohexane by Transition Metal Oxides on Zeolites

Riley¹

2012

TOCATJ

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Transition metals (Co, Mn, Fe, and Cu) were deposited as the hydrated oxides on a series of zeolites (Y, , ZSM-5, mordenite, and ferrierite) and examined for activity for the oxidation of cyclohexane at 70°C and ambient pressure. The materials that demonstrated catalytic activity under these extremely mild conditions were the cobalt-based catalysts. The copper and copper/iron materials demonstrated stoichiometric activity for the oxidation of cyclohexane to cyclohexanol and cyclohexanone. The cobalt-based catalysts produced the intriguing products caprolactone, 1-hexanol, and 3-methyl-1-pentanol, as well as the expected cyclohexanol and cyclohexanone. Of most interest was the production of 1-hexanol, indicative of novel activity in the oxidative ring cleavage and oxidation of cyclohexane.

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“…26534/kimika.v25i2.11-22 understanding of how proteins function. More importantly, the role of various metalloenzymes and their synthetic analogs as essential catalysts in oxidation reaction for laboratory and industrial use is indispensable (Weiner et al 2010, Tolman et al 2006, Punniyamurthy et al 2005, Gamez 2004, Sima'ndi 2003, Funabiki 1997.…”

Section: Introductionmentioning

confidence: 99%

Electronic Effects in Oxidation Reactions Utilizing Dinuclear Copper Complexes with the Bis[3-(2-hydroxybenzylideneamino)phenyl] Sulfone Ligand

Armando

Reyes

Kashihara

et al. 2014

KIMIKA

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Copper acetate and the ligands bis[3-(3-tert-butyl-2-hydroxy-5-methoxybenzylideneamino)phenyl] sulfone and bis[3-(3,5-di-tert-butyl-2-hydroxybenzylideneamino)phenyl] sulfone were reacted to form the complexes with 2:1 copper:ligand ratio, Cu2[B(t-Bu) (OMe)BAPS](µ-OCH3)2 (4) and with 2:2 copper:ligand ratio, Cu2[B(t-Bu)2BAPS]2 (5), respectively. Structures of 4 and 5 were determined based on IR, UV-Vis, and FAB-MS data in comparison with previously characterized related copper complexes. The two complexes 4 and 5 were utilized in the oxidation of the substrates 2,4-and 2,6-di-tertbutylphenol (dtbp) at -50C with H2O2 in CH2Cl2. The coupling products are preferred in both cases. For 2,4-dtbp, yields of 4,600% and 7,200% of 3,3',5,5'-tetra-tert-butyl-2,2'-biphenol were achieved with the use of 4 and 5, respectively. For 2,6-dtbp, yields of 1,900% and 400% of 3,3',5,5'-tetra-tert-butyl-4,4'-biphenol were realized utilizing 4 and 5, respectively. These show that the methoxy groups activated the complex. Based on low temperature UV-vis results, a µ-η 2 :η 2 -peroxo or a µ-hydroperoxo intermediate was possibly formed by the reaction of 4 with the H2O2. This effected the oxidation of the 2,4-and 2,6-dtbp substrates but also resulted in the attack of other complexes which acted as substrates. A proposed oxidation mechanism using complex 4 and related complexes is presented.

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Recent Advances in Transition Metal Catalyzed Oxidation of Organic Substrates with Molecular Oxygen

Abstract: For Abstract see ChemInform Abstract in Full Text.

Cited by 67 publications

References 1 publication

Catalytic Performance of Co3O4 on Different Activated Carbon Supports in the Benzyl Alcohol Oxidation

Catalytic Performance of Co3O4 on Different Activated Carbon Supports in the Benzyl Alcohol Oxidation

Oxidation of Cyclohexane by Transition Metal Oxides on Zeolites

Electronic Effects in Oxidation Reactions Utilizing Dinuclear Copper Complexes with the Bis[3-(2-hydroxybenzylideneamino)phenyl] Sulfone Ligand

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