Results 221 to 230 of about 4,461 (274)

Nitrile Oxides

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Volker Jaeger, Pedro A. Colinas
openaire   +1 more source

The mild oxidation of nitrile oxides affords a convenient entry to nitrosocarbonyl intermediates, versatile tools in organic syntheses

Tetrahedron, 1999
Nitrile oxides are oxidized by tertiary amine N-oxides in different solvents at room temperature to afford in the presence of dienes nitrosocarbonyl adducts in fair yields.
P Quadrelli, M Mella, P Caramella
exaly   +1 more source

A nitroketene to nitrile oxide transformation

Journal of the Chemical Society, Chemical Communications, 1992
2,3-Dihydropyrrole-2,3-diones 1 thermally extrude CO, giving imidoylketenes 2, which cyclise efficiently to 4-quinolones 3; however, the analogous nitro(imidoyl)ketene 5 eliminates CO2 and rearranges to the 3-oximino-3H-indole 9, presumably via an imidoylnitrile oxide 7.
Kappe, CO, Kollenz, G, Wentrup, C
openaire   +4 more sources

Advances in nitrile oxides chemistry

Experientia, 1970
Dopo una breve introduzione storica, viene dato un quadro delle attuali conoscenze sulla chimica degli ossidi di nitrili con particolare riguardo ai suoi piu recenti sviluppi. L'applicazione di metodi gia noti e l'introduzione di nuovi metodi di preparazione hanno portato alla cinquantina il numero dei nitrilossidi isolati, oltre a quelli numerosi ...
openaire   +2 more sources

Polyfluorinated nitrile oxides

Chemistry of Heterocyclic Compounds, 1989
(2+3)-Cycloaddition of polyfluorinated aliphatic nitrile oxides, generated in situ, to donor dipolarophiles takes place regioselectively to give the 5-substituted isoxazolines, and is limited by the donor and steric properties of the dipolarophiles.
N. V. Vasil'ev, V. S. Savostin, A. F. Kolomiets, G. A. Sokol'skii   +3 more
openaire   +1 more source

Behaviour of nitrile oxides towards nucleophiles. Part 5. Polymerization of aromatic nitrile oxides

Journal of the Chemical Society, Perkin Transactions 1, 1979
Aromatic nitrile oxides undergo polymerization by treatment with trimethylamine in dimethyl sulphoxide. Chain lengthehing occurs via the C–O bonds, as shown by the catalytic hydrogenation of such polymers to aroylamides. The apparent degree of polymerization ranges from 15 up to ca. 100 monomer units. These polymers are quite stable in the solid state,
DE SARLO, FRANCESCO, GUARNA, ANTONIO
openaire   +2 more sources

Addition of Nitrile Oxides to N‐Allylsaccharin.

ChemInform, 2005
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access the actual ChemInform Abstract, please click on HTML or PDF.
V. Dirnens, S. Belyakov, E. Lukevics
openaire   +1 more source

Syntheses with nitrile oxides. 2. Reaction of aromatic nitrile oxides with bis(trimethylsilylcarbodiimide)

Bulletin of the Russian Academy of Sciences Division of Chemical Science, 1992
The reaction of aromatic nitrile oxides with bis(trimethylsilylcarbodiimide) gives 5-amino-3-aryl-1,2,4-oxadiazoles.
V. A. Ogurtsov, O. A. Rakitin, N. V. Obruchnikova, L. I. Khmel'nitskii   +3 more
openaire   +1 more source

Activation of nitriles by hydrogen bonding in cycloadditions with nitrile oxides

Journal of Heterocyclic Chemistry, 1984
AbstractThe dipolarophilic activity of aromatic nitriles in cycloaddition with benzonitrile oxides is remarkably enhanced by ortho‐acylamino substituents. The activation depends upon the solvent and can be ascribed to a hydrogen bond which assists cycloaddition.
Antonino Corsaro, Ugo Chiacchio, Pierluigi Caramella, Giovanni Purrello   +3 more
openaire   +1 more source

Nitrile Oxide Cycloadditions to Olefinated Sugars.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Pedro A Colinas, Volker Jäger, Albrecht Lieberknecht, Rodolfo D Bravo   +3 more
openaire   +1 more source