Increasing the index of covalent oxygen bonding at nitrogen attached to carbon

Boyer, J. H.

doi:10.1021/cr60328a002

Cited by 50 publications

(24 citation statements)

References 214 publications

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“…RuO 2 NPs showed a dramatic increase in the peak intensity at 531.0 eV; this too clearly confirmed the formation of oxygen species on the RuO 2 NPs during the N-oxidation reaction. 46 Kim et al, 47 investigated the formation of various oxygen species on the RuO 2 surface under various conditions.…”

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confidence: 55%

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Catalytic N-oxidation of tertiary amines on RuO2NPs anchored graphene nanoplatelets

Gopiraman¹,

Bang²,

Babu³

et al. 2014

Catal. Sci. Technol.

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Ultrafine ruthenium oxide nanoparticles (RuO 2 NPs) of an average diameter of 1.3 nm were anchored on graphene nanoplatelets (GNPs) using Ru(acac) 3 precursor by a very simple dry synthesis method. The resultant material (GNPs-RuO 2 NPs) was used as a heterogeneous catalyst for the N-oxidation of tertiary amines for the first time. The transmission electron microscopic (TEM) images of the GNPs-RuO 2 NPs 10 showed an excellent attachment of RuO 2 NPs on GNPs. The loading of Ru in GNPs-RuO 2 NPs was 2.68 wt%, as confirmed by scanning electron microscope-energy dispersive spectroscopy (SEM-EDS). X-ray photoelectron spectrum (XPS) and X-ray diffraction pattern (XRD) of GNPs-RuO 2 NPs revealed that the chemical state of Ru on GNPs was +4. After the optimization of reaction conditions for N-oxidation of triethylamine, the scope of the reaction was extended with a various aliphatic, alicyclic and aromatic 15 tertiary amines. The GNPs-RuO 2 NPs showed an excellent catalytic activity in terms of yields even at a very low amount of Ru catalyst (0.13 mol%). The GNPs-RuO 2 NPs was heterogeneous in nature, chemically as well as physically very stable and reused for up to 5 times.

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confidence: 55%

“…1,2 Particularly, N-oxides of aromatic amines are extensively used as protecting groups, auxiliary agents, and oxidants in various organic reactions.…”

Section: Introductionmentioning

confidence: 99%

Catalytic N-oxidation of tertiary amines on RuO2NPs anchored graphene nanoplatelets

Gopiraman¹,

Bang²,

Babu³

et al. 2014

Catal. Sci. Technol.

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“…It was found that, when N,N-dimethylhydrazone 3b was oxidized, hexahydro-1,3,5-trihydroxy-1,3,5-triazine [15]. Our results give the evidence that dimethylhydroxylamine is subsequently oxidized to nitrosomethane according to Scheme 2.…”

supporting

confidence: 54%

Conversion of Formyl into Cyano groups in kojic acid derivatives and analogues

et al. 1996

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“…In this proposed mechanism, diuron is initially oxidized by OCl − to produce phenylisocyanate and DMA, which can be further transformed to DCA and chlorinated DMA (CDMA). It is known that primary aromatic amines can be oxidized to form nitroso compounds, while aromatic nitroso compounds are easily oxidized to nitro compounds by many oxidizing agents (Boyer 1980; Hedayati 1972). Therefore, one potential oxidation product from DCA is 1,2-dichloro-4-nitrobenzene.…”

Section: Resultsmentioning

confidence: 99%

Influence of nitrogen source on NDMA formation during chlorination of diuron

Chen

Young

2009

Water Research

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N-Nitrosodimethylamine (NDMA) is formed during chlorination of water containing the herbicide diuron (N′-(3,4-dichlorophenyl)-N, N-dimethylurea) but formation is greatly enhanced in the presence of ammonia (chloramination). Groundwater impacted by agricultural runoff may contain diuron and relatively high total nitrogen concentrations; this study examines the impact of the nitrogen form (ammonium, nitrite or nitrate) on NDMA formation during chlorination of such waters. NDMA formation during chlorination of diuron increased in the order nitrite < nitrate < ammonium for a given chlorine, nitrogen, and diuron dose. Formation of dichloramine seemed to fully explain enhanced NDMA formation in the presence of ammonium. Nitrate unexpectedly enhanced nitrosation of diuron derivatives to form NDMA compared to the cases of no added nitrogen or nitrite addition. Nitrite addition is less effective because it consumes more chlorine and produces intermediates that react rapidly with diuron and its aromatic byproducts. Differences between surface and groundwater in nitrogen forms and concentrations and disinfection approaches, suggest strategies to reduce NDMA formation should vary with drinking water source.

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Increasing the index of covalent oxygen bonding at nitrogen attached to carbon

Cited by 50 publications

References 214 publications

Catalytic N-oxidation of tertiary amines on RuO2NPs anchored graphene nanoplatelets

Catalytic N-oxidation of tertiary amines on RuO2NPs anchored graphene nanoplatelets

Conversion of Formyl into Cyano groups in kojic acid derivatives and analogues

Influence of nitrogen source on NDMA formation during chlorination of diuron

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