Catalytic activity of manganese oxide supported on alumina in the synthesis of quinoxalines

Rekha, M.; Kathyayini, H.; Nagaraju, N.

doi:10.1007/s11705-013-1360-3

Cited by 17 publications

(4 citation statements)

References 24 publications

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“…127–129 °C); δ H (400 MHz, CDCl 3 ) 7.27–7.29 (6H, m), 7.44–7.52 (4H, d, J = 7.4 Hz), 7.62–7.73 (2H, dd, J = 8.7 and 2.3 Hz) and 8.05–8.13 (2H, dd, J = 8.7 and 2.3 Hz); δ C (100 MHz, CDCl 3 ) 126.88, 127.47, 127.91, 128.05, 129.12, 137.73, 140.01 and 152.38; m/z (ES-API, +ve) 283.1 (M + 1100). Physical and spectroscopic data agree with those reported in literature [34].…”

Section: Methodssupporting

confidence: 90%

Nucleophilic Substitution on 2-Monosubstituted Quinoxalines Giving 2,3-Disubstituted Quinoxalines: Investigating the Effect of the 2-Substituent

Ndlovu

Nxumalo

2016

Molecules

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An investigation on the effect of substituent at the 2-position of mono-substituted quinoxalines in the synthesis of di-substituted quinoxaline derivatives via nucleophilic substitution reactions, is reported. Di-substituted quinoxalines bearing aryl-alky, aryl-aryl, aryl-heteroaryl, aryl-alkynyl, and amino-alkyl substituents were prepared in moderate to good yields. 2-Monosubstituted quinoxalines bearing a phenyl and butyl substituent reacted readily with alkyl-, aryl-, heteroaryl-and alkynyl-nucluephiles, giving di-substituted quinoxalines. 2-Monosubstituted quinoxalines bearing an amine and alkynyl substituent only reacted with alkyl nucleophiles. Oxidative rearomatization to give 2,3-disubstituted quinoxaline products occurred in atmospheric O 2 .

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Section: Methodssupporting

confidence: 90%

Nucleophilic Substitution on 2-Monosubstituted Quinoxalines Giving 2,3-Disubstituted Quinoxalines: Investigating the Effect of the 2-Substituent

Ndlovu

Nxumalo

2016

Molecules

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“…[ 27 ] The SiOSi connection of layered silicate is responsible for the weak band at 1099 cm −1. [ 28 ] The band at 3427 cm −1 exhibits H‐bonded OH stretching, which could be attributed to moisture absorption by the SiO 2 on the surface of nanocomposites. There is no new band or shift in band location of composite, implying that there is no substantial chemical interaction between the nanoparticle and the PP.…”

Section: Resultsmentioning

confidence: 99%

Polypropylene/silica nanocomposite membranes for lithium‐ion battery separator: Studies on interfacial tuning of pore structure, mechanical and thermal properties

Kottathodi,

Royaud,

Poncot

et al. 2023

SPE Polymers

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Energy storage and mobility industries use polypropylene (PP) nanocomposites. The energy storage applications of newly made microporous SiO2 filled, porous PP nanocomposites combining PP, natural rubber, and SiO2 nanoparticles then subsequently removing natural rubber from the nanocomposite were explored in this paper. SEM pictures showed how the pore morphology was altered by nanofillers. Mechanical tensile tests reveal that the SiO2 nanofiller enhances the mechanical properties of microporous polypropylene. XRD and DSC experiments have shown that SiO2 nanoparticles works as a nucleating agent but has no impact on the crystallinity of PP. The electrolyte absorption, porosity, ionic conductivity, wettability and charge–discharge performance were investigated for PP/SiO2 nanocomposite separator. SiO2 nanoparticles in the matrix have a significant impact on the wettability of PP membrane, since the presence of SiO2 nanoparticle reduces the contact angle from 24° to 15°. SiO2 filled PP membrane outperformed microporous PP and celgard separator in terms of electrolyte uptake (230%) and porosity (62%). In comparison to microporous PP, the PP/SiO2 membrane demonstrated a better ionic conductivity (5.9 × 10−4 S cm−1). Finally, Li/PP‐SiO2/LiFePO4 coin cells (2320 type) were fabricated and delivered a discharge capacity of 138 mAh g−1.

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“…Loading of manganese oxide on other transition elements changes in its physico‐chemical properties making it catalytically more active. Mn oxides with high thermal stability are ideal for the purpose of oxidation of volatile organic compounds (VOC) . Oxides of manganese are important in many redox reactions.…”

Section: Zirconia Supported Mixed Oxidesmentioning

confidence: 99%

“…Mn oxides with high thermal stability are ideal for the purpose of oxidation of volatile organic compounds (VOC). [44,45] Oxides of manganese are important in many redox reactions. Manganese oxides were used as catalysts for the oxidation of CH 4 [46] and CO. [47] The manganese re-oxidation is reversible up to [41] with permission from Royal Society of Chemistry.…”

Section: Mn Doped On Zromentioning

confidence: 99%

Our Contributions in Synthesis of Diverse Heterocyclic Scaffolds by Using Mixed Oxides as Heterogeneous Catalysts

Bhaskaruni

Gangu

Maddila

et al. 2018

The Chemical Record

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This personal account mainly introduces and reviews our recent contributions in developing different catalyst materials involving mixed oxides and their scope as renewable catalysts in multicomponent reactions to synthesize various novel heterocyclic scaffolds under green conditions. The application of various mixed oxides and their composites in the organic synthesis is emphasized through this review, in order to reveal the versatility, scope and importance of mixed oxides and their interactions during the reaction. We have also briefed the limitations of mixed oxides as catalysts, to put forward the broader prospective in the field.

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Catalytic activity of manganese oxide supported on alumina in the synthesis of quinoxalines

Cited by 17 publications

References 24 publications

Nucleophilic Substitution on 2-Monosubstituted Quinoxalines Giving 2,3-Disubstituted Quinoxalines: Investigating the Effect of the 2-Substituent

Nucleophilic Substitution on 2-Monosubstituted Quinoxalines Giving 2,3-Disubstituted Quinoxalines: Investigating the Effect of the 2-Substituent

Polypropylene/silica nanocomposite membranes for lithium‐ion battery separator: Studies on interfacial tuning of pore structure, mechanical and thermal properties

Our Contributions in Synthesis of Diverse Heterocyclic Scaffolds by Using Mixed Oxides as Heterogeneous Catalysts

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