Results 1 to 10 of about 239,878 (262)

Development of variously functionalized nitrile oxides [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2015
N-Methylated amides (N,4-dimethylbenzamide and N-methylcyclohexanecarboxamide) were systematically subjected to chemical transformations, namely, N-tosylation followed by nucleophilic substitution.
Haruyasu Asahara   +2 more
doaj   +7 more sources

Functionalized Nitrile Oxides and Their Synthetic Equivalents: Recent Advances in Generation Methods and Synthetic Applications [PDF]

open access: yesMolecules
Functionalized nitrile oxides have attracted increasing attention because the incorporated functional groups not only influence cycloaddition reactivity but also provide valuable handles for subsequent molecular diversification.
Nagatoshi Nishiwaki
doaj   +3 more sources

Azirinyl-Substituted Nitrile Oxides: Generation and Use in the Synthesis of Isoxazole Containing Heterocyclic Hybrids [PDF]

open access: yesMolecules
The procedure for the generation of azirinyl-substituted nitrile oxides by the reaction of 2-(diazoacetyl)-2H-azirines with tert-butyl nitrite while preserving the azirine ring has been developed.
Alexander S. Dudik   +4 more
doaj   +3 more sources

Synthesis of 3,4,5-trisubstituted isoxazoles in water via a [3 + 2]-cycloaddition of nitrile oxides and 1,3-diketones, β-ketoesters, or β-ketoamides [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2022
Herein we report a method for the synthesis of 3,4,5-trisubstituted isoxazoles in water under mild basic conditions at room temperature via a [3 + 2]-cycloaddition of nitrile oxides and 1,3-diketones, β-ketoesters, or β-ketoamides.
Md Imran Hossain   +3 more
doaj   +2 more sources

Fluorescent Probes from Aromatic Polycyclic Nitrile Oxides: Isoxazoles versus Dihydro‐1λ3,3,2λ4‐Oxazaborinines [PDF]

open access: yesChemistryOpen, 2019
Anthracenenitrile oxide undergoes 1,3‐dipolar cycloaddition reaction with propargyl bromide affording the expected isoxazole as single regioisomer, suitably synthetically elaborated and functionalized with a protected triple bond.
Dr. Mattia Moiola   +7 more
doaj   +2 more sources

Facile synthesis of hydantoin/1,2,4-oxadiazoline spiro-compounds via 1,3-dipolar cycloaddition of nitrile oxides to 5-iminohydantoins [PDF]

open access: yesBeilstein Journal of Organic Chemistry
The cycloaddition of 1,3-dipoles at C=N bonds is a relatively rare process, in contrast to the widespread cycloaddition reactions at C=C, C≡C, and C=S bonds.
Juliana V. Petrova   +6 more
doaj   +2 more sources

Reaction of Nitrilimines and Nitrile Oxides with Hydrazines, Hydrazones and Oximes

open access: yesMolecules, 2005
This review article discusses the reaction of nitrilimines and nitrile oxides with hydrazines, hydrazones, and oximes. Three reaction modes were observed.
Adel M. Awadallah   +1 more
exaly   +3 more sources

Combined experimental and theoretical studies of regio- and stereoselectivity in reactions of β-isoxazolyl- and β-imidazolyl enamines with nitrile oxides [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2016
Reactions of β-azolyl enamines and nitrile oxides were studied by both experimental and theoretical methods. (E)-β-(4-Nitroimidazol-5-yl), (5-nitroimidazol-4-yl) and isoxazol-5-yl enamines smoothly react regioselectively at room temperature in dioxane ...
Ilya V. Efimov   +10 more
doaj   +2 more sources

Synthesis of novel 1,2,4-oxadiazole-isoxazoline hybrids and their in silico potential with adenosine receptors [PDF]

open access: yesBeilstein Journal of Organic Chemistry
A concise and efficient synthetic route to novel 1,2,4-oxadiazole-isoxazoline hybrids 7 has been developed via regioselective 1,3-dipolar cycloaddition of in situ-generated nitrile oxides with 3-(p-substituted-aryl)-5-vinyl-1,2,4-oxadiazoles 6.
Pshtiwan S. Mohammed   +4 more
doaj   +2 more sources

Scope and Limitations of Boron Fluorescent Complexes from Stable Nitrile Oxides in ABPP Assays [PDF]

open access: yesACS Omega, 2019
Mattia Moiola   +6 more
doaj   +2 more sources

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