- Electrochemical synthesis of nitroanilines
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Alkylamines and amides are readily prepared by nucleophilic aromatic substitution of hydrogen in nitroarenes by electrochemical oxidation. Useful yields (15-85%) are achieved in a simple direct and regioselective amination process. The synthetic method has been examined in the absence and presence of external bases, used to promote the first step of the nucleophilic aromatic substitution reaction, i.e. the nucleophilic attack. In both cases, good results were obtained. The unreacted starting material can easily be recovered at the end of the electrochemical oxidation process. This new method represents an environmentally favourable route to amino- and amido-substituted nitroaromatic compounds.
- Gallardo, Iluminada,Guirado, Gonzalo,Marquet, Jordi
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p. 251 - 259
(2007/10/03)
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- 19F NMR as an Analytical Tool for Fluorinated Agrochemical Research
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19F NMR was utilized to monitor the photodegradation of trifluralin directly in NMR tubes without extraction, cleanup, concentration, or chromatographic separation.Dissipation curves were generated for the parent pesticide and degradation products, and the major products identified by addition of authentic standarts were α-α-α-trifluoro-2,6-dinitro-N-propyl-p-toluidine (II), α,α,α-trifluoro-2,6-dinitro-p-toluidine (III), and 2-ethyl-7-nitro-5-(trifluoromethyl)benzimidazole (VII).Numerous peaks were observed in the spectra that may represent labile intermediates not generally observed with other analytical techniques.Keywords: 19F NMR; trifluralin; photodegradation
- Mabury, Scott A.,Crosby, Donald G.
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p. 1845 - 1848
(2007/10/03)
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- Benzimidazole insecticides
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2,6-Di(fluoroalkyl)-4-nitrobenzimidazoles and certain N-acyl derivatives thereof, including sulfonates, thiocarboxamides, and carboxylates, are used to control a broad spectrum of mites and insects with particularly good effect against members of the orde
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- Quinoxaline derivatives as immune regulants
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Novel quinoxaline derivatives, useful as immune regulatory agents capable of altering the immune response in mammals.
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- Control of animal parasites with benzimidazoles
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A class of substituted benzimidazoles are useful parasiticides for the systemic control of insects and acarina which feed on living tissues of animals. The compounds, which control both bloodsucking parasites and flesh-eating parasites, are characterized
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