Results 301 to 310 of about 2,937,461 (378)

Synthesis of Oxadiazol-5-imines via the Cyclizative Capture of in Situ Generated Cyanamide Ions and Nitrile Oxides.

Organic Letters, 2016
An unprecedented intermolecular cyclizative capture of the cyanamide anion and several nitrile oxides enables the synthesis of oxadiazol-5-imines.
Shreesha V. Bhat, D. Robinson, J. Moses, Pallavi Sharma   +3 more
semanticscholar   +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   +3 more sources

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.
Lenor I. Khmel’nitskii, Oleg A. Rakitin, N. V. Obruchnikova, V. A. Ogurtsov   +3 more
openaire   +2 more sources

Stereo-, Regio-, and Chemoselective [3 + 2]-Cycloaddition of (2E,4E)-Ethyl 5-(Phenylsulfonyl)penta-2,4-dienoate with Various Azomethine Ylides, Nitrones, and Nitrile Oxides: Synthesis of Pyrrolidine, Isoxazolidine, and Isoxazoline Derivatives and a Computational Study.

Journal of Organic Chemistry, 2016
One-pot chemo-, regio-, and stereoselective synthesis of series of heterocyclic and spiroheterocyclic compounds was accomplished through mono- and bis[3 + 2]-cycloaddition reactions of (2E,4E)-ethyl 5-(phenylsulfonyl)penta-2,4-dienoate as a dipolarophile
Ulaganathan Sankar, Choutipalli Venkata Surya Kumar, V. Subramanian, K. Balasubramanian, S. Mahalakshimi   +4 more
semanticscholar   +1 more source

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   +3 more sources

Oxidative reactions of nitriles—I

Tetrahedron, 1958
Abstract Diphenyl-, cyclohexylphenyl- and methylphenyl-acetonitrile react with tert.-butyl hydroperoxide in the presence of cuprous ions at 80°. By this means, α-tert.-butylperoxydiphenyl-, α-tert.-butylperoxyphenylcyclohexyl- and α-tert.-butylperoxymethylphenyl-acetonitrile, respectively, were obtained in good to excellent yields.
George Sosnovsky, M. S. Kharasch
openaire   +3 more sources

ChemInform Abstract: Cycloadditions of Nitrile Oxides to Itaconimides.

ChemInform, 1992
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
V. Hanus, Jan Svetlik, Tibor Liptaj
openaire   +3 more sources

Enolate-mediated 1,3-dipolar cycloaddition reactions of allyl ketones with nitrile oxides: direct access to 3,5-disubstituted isoxazolines.

Organic and biomolecular chemistry, 2016
TMG-promoted [3 + 2] organocatalytic 1,3-dipolar cycloaddition reactions of allyl ketones with in situ generated nitrile oxides have been developed. This strategy could generate 3,5-disubstituted isoxazolines in high yields and regioselectivities.
Wenjun Li, Xiao Zhou, Zhenyan Shi, Yang Liu, Zhantao Liu, Hua Gao   +5 more
semanticscholar   +1 more source

Macromolecular surface design: photopatterning of functional stable nitrile oxides.

Angewandte Chemie, 2015
The efficient trapping of photogenerated thioaldehydes with functional shelf-stable nitrile oxides in a 1,3-dipolar cycloaddition is a novel and versatile photochemical strategy for polymer end-group functionalization and surface modification under mild ...
O. Altintas, M. Glassner, César Rodriguez-Emmenegger, A. Welle, V. Trouillet, C. Barner‐Kowollik   +5 more
semanticscholar   +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, Giovanni Purrello, Pierluigi Caramella   +3 more
openaire   +2 more sources