Results 1 to 10 of about 3,033,277 (268)

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   +5 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: diamondBeilstein 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   +4 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: diamondBeilstein 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   +4 more sources

MnVI-NP–Catalyzed Generation of Nitrile Oxides: Easy Access to Isoxazolines and Isoxazoles via Stereoselective 1,3-Dipolar Cyclo­addition Reactions [PDF]

open access: goldSynOpen, 2022
The versatility and effectiveness of MnVI-NPs as a catalyst is examined for the generation of nitrile oxides from aldoximes and subsequent 1,3-dipolar cycloaddition reactions.
Yasmin Saima, Saikat Khamarui
doaj   +2 more sources

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

open access: goldACS Omega, 2019
Mattia Moiola   +6 more
doaj   +3 more sources

Correction: Novel valdecoxib derivatives by ruthenium(ii)-promoted 1,3-dipolar cycloaddition of nitrile oxides with alkynes - synthesis and COX-2 inhibition activity. [PDF]

open access: yesMedchemcomm, 2018
Correction for ‘Novel valdecoxib derivatives by ruthenium(ii)-promoted 1,3-dipolar cycloaddition of nitrile oxides with alkynes – synthesis and COX-2 inhibition activity’ by Silvia Roscales et al., Med. Chem. Commun., 2018, DOI: 10.1039/c7md00575j.
Roscales S   +5 more
europepmc   +2 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   +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

The Puzzle of the Regioselectivity and Molecular Mechanism of the (3+2) Cycloaddition Reaction Between E-2-(Trimethylsilyl)-1-Nitroethene and Arylonitrile N-Oxides: Molecular Electron Density Theory (MEDT) Quantumchemical Study [PDF]

open access: yesMolecules
The regioselectivity and molecular mechanism of the (3+2) cycloaddition reaction between E-2-(trimethylsilyl)-1-nitroethene and arylonitrile N-oxides were explored on the basis of the ωB97XD/6-311+G(d) (PCM) quantumchemical calculations.
Mikołaj Sadowski   +2 more
doaj   +2 more sources

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