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Showing 1 to 20 of 37 for “"oximes"”.
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Cation radical induced oxidative chemistry of hydrazones and oximes
Electron transfer reactions of cation radicals have drawn much interest (1). Shine and Sugiyama were the first to observe that alkyl radicals were formed by an initial electron transfer step in reactions of thianthrene cation radical with organomercurials (2). The possibility that thianthrene …
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Antimycobacterial 2-aminoquinazolinones and benzoxazole-based oximes: synthesis, biological evaluation, physicochemical profiling and supramolecular derivatization
… (AQZs) and benzoxazole-based oximes (BZOs). A hit compound for each of these classes with low micromolar antimycobacterial activity had previously been identified through phenotypic whole-cell in vitro screening.
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The Oximes of 1-(3-Methoxy-4-Agetoxyphenyl)-2, 6-Dicarbethoxycyclohex-Anedione-3,5 and their Derivatives
The oximes represent an important group of compounds in the research field of organic chemistry. They can "be prepared either by the reaction of the carbonyl group with hydroxylamine or by the reaction of nitrous acid or nitrous acid esters on compounds containing reactive methylene groups. These …
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The Preparation of 1-(p-Acetoxyphenyl) -2,6-Dicarbethoxy-3,5-Dioximecyclohexane, and its Diamine Derivative
The oximes and amines represent important compounds in the research field as they are useful in further syntheses,of important compounds. It was the problem of this thesis to prepare a dioxime of 1-(p-acetoxyphenyl)-,6-dicarbethoxycyclohexanedione-3,5, which upon reduction would produce a diamine …
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ΣΧΕΔΙΑΣΜΟΣ ΚΑΙ ΣΥΝΘΕΣΗ ΝΕΩΝ ΠΥΡΕΘΡΟΕΙΔΩΝ
… WITH PIPERONAL. 2) BENZYLETHERS OF THE OXIMES OF INDANONE, FLUORENONE, 2- METHYLINDANONE AND 2,2-DIMETHYLINDANONE WHICH WERE PREPARED BY THE REACTION OF THE SUITABLE SUBSTITUTED BENZYLCHLORIDES (C1CH2C6H5R, R:F,CL, CLCH2C6H4R1R2,R1:R2:CL) WITH THE OXIMES SODIUM SALTS. THE RELATIVE …
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1,2-naphthoquinone mono-oximato complexes of ruthenium
… the sodium salts of the 112-naphthoquinone mono-oximes with hydrated ruthenium(III) chloride in aqueous tetrahydrofuran.
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Studies of quinone monooximes derived from dihydroxyphenylalanines
… 5-hydroxy-, 6-hydroxy-1,2-naphthoquinone 2-oximes and 7-hydroxy-1,2-naphthoquinone 1-oxime were treated with excess sodium nitrite/acid, but in all cases no reaction was observed. All the new organic compounds of 1,2- and 1,4-oximes obtained from these studies were characterised by elemental …
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Biological treatment schemes for preventing oxime inhibition of nitrification
… of nitrification inhibition caused by three oximes, acetaldehyde oxime (AAO), aldicarb oxime (ADO), and methyl ethyl ketoxime (MEKO), and to investigate the fate of these oximes under anoxic, denitrifying conditions. Results from aerobic batch studies showed that MEKO was the only oxime which …
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Trifluoromethyl ketones: Potential insecticides towards Anopheles gambiae
… Focus was directed towards synthesis of oximes, oxime ethers, and hydrazones as potential prodrugs to prevent immediate hydration and reach the central nervous system. The synthesis of various oximes, oxime ethers, and hydrazones has been shown to give cimpounds toxic to Anopheles gambiae …
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Use of Oximes and Schiff-bases as Bridging/Chelating Ligands with Select 3d and 3d/4f Ions in Cluster Chemistry and a Mechanistic Insight into the Roles of Transition Metal Ions in the Formation of Tetrazoles
The employment of acenaphthenequinone dioxime (acndH2), 9,10-phenanthrenedione-9-oxime (phenoxH), 9,10-phenanthrenedione-9,10-dioxime (phendoxH2), and N-naphthalidine-2-amino-naphthol (nanpH2) in homometallic 3d- and heterometallic 3d/4f-metal cluster chemistry has afforded a Mn cluster and novel …
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Structure Elucidation and Biosynthesis of Selected Bioactive Marine Natural Products (Bromophenols, Aplysina, Fistularis, Kelletia)
… thus providing evidence for the intermediacy of oximes in the conversion of amino acids to other sponge metabolites of biological interest. A biosynthetic pathway consistent with these experiments has been proposed.
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Studies of Some Catalytic Properties of Zeolites
… vapour phase Beckmann rearrangement of alicyclic oximes has been investigated, particularly for the conversion of cyclopentanone oxime to 2-piperidone. The rearrangements of cyclopentanone oxime and cyclohexanone oxime were studied spectroscopically, and the conversion of cyclopentanone oxime …
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NEW BIOCATALYTIC PLATFORMS FOR THE SYNTHESIS OF HIGHLY VALUABLE COMPOUNDS THROUGH INTENSIFIED BIOPROCESSES
… compounds by performing a simple dehydration of oximes in water. This process, possible thanks to aldoxime dehydratase enzymes (Oxds), has been optimised to overcome the limited stability of these groups of biocatalysts as well as to maximise productivity. Thanks to a whole-cell entrapment into …
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The solvent extraction of CU (II) from chloride solutions with certain non-chelating nitrogen donor ligands
… from chloride solutions with some aliphatic oximes as well as some pyridine carboxylates was studied and the complexes formed in the organic phase identified. The association of octanal oxime in toluene was taken into account in the extraction studies and formation constants for dimers and …
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ESTUDOS VISANDO A SÍNTESE DE DIAMINAS DERIVADAS DE PINENOS COM POTENCIAIS ATIVIDADES NOS RECEPTORES NICOTÍNICOS DO SISTEMA NERVOSO CENTRAL
… carried through. So it had been produced the oximes 4a,b and 3a for latter attempts of reduction to obtain the amino compounds IIa,b and IVa that had shown unproductive and it will be better studied in the next future..
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Studies of 1,2-quinone monooximes and their metal complexes
The chemistry of 1,2-quinone monooximes hi« been reviewed. The synthesis of 5-amlno, 5-alkylamino and 5-acylamino substituted 1,2-benzoquinone monooximes was systematically studied. Thus, It has been found that 5-amino-1,2-benzoquinone-2-oxime (5-AqoH), 5-ethylamino-4-methyl 1-1,2- …
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Copper-Catalyzed Amino Oxygenation of Alkenes and Dienes: A Novel Amino-Initiation Pathway Using O-Benzoylhydroxylamines
… also applicable to alcohols, amides, 1,3-diones, oximes, and thioic acids as nucleophilic trapping partners. These reactions proceed in a facile manner, producing good yields and tolerance of a wide range of functional groups with excellent chemo- and regioselectivity. Mechanistic studies …
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Bromotyrosine-derived natural products: synthetic and biological studies
… two is concerned with bromotyrosine-derived oximes and is divided into two parts. The syntheses of the natural products (5)-bromoverongamine, ianthelline and JBIR-44 are described in Part one and the structure-activity relationship studies into these products is described in Part two. The …
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Air stripping and biological treatment of ammonium sulfate wastewater from the caprolactam manufacturing process
… studies of this waste stream focused on two oximes: namely cyclohexanone oxime and methylethyl ketoxime (MEKO), which were both found in the wastewater in concentrations of 50-150 mg/L. The conclusion of this work is that cyclohexanone oxime is not inhibitory to nitrification .in …
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Site-Specific Labelling of Nucleic Acids by Catalyst-Free 1,3-Dipolar Cycloadditions
… or 1,4-disubstituted hydroxyethoxybenzaldehyde oximes and highly regioselective cycloadditions to a simple alkyne, the isomeric isoxazoles were obtained in excellent yields. Functional group interchange of the pendant hydroxy group to a phosphoramidite functionality facilitated coupling to DNA …
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