Results 21 to 30 of about 252,458 (275)

Reactions of 5-Aroylmethylene-3-benzyl-4-oxo-2-thioxo-1,3-thiazolidines with Nitrile Oxides

Molecules, 2001
E,Z-5-Aroylmethylene-3-benzyl-4-oxo-2-thioxo-1,3-thiazolidines (3a-c) react with 4-methoxy and 4-chlorophenylnitrile oxides (4a and b) in pyridine solution to afford one or more of the following compounds: Z-3, Z-2,4-dioxo analogues 5 and 3,6-diaryl-1,4 ...
Ahmed S. A. Youssef, Kamal A. Kandeel
doaj   +1 more source

The Participation of 3,3,3-Trichloro-1-nitroprop-1-ene in the [3 + 2] Cycloaddition Reaction with Selected Nitrile N-Oxides in the Light of the Experimental and MEDT Quantum Chemical Study

Molecules, 2021
The regioselective zw-type [3 + 2] cycloaddition (32CA) reactions of a series of aryl-substituted nitrile N-oxides (NOs) with trichloronitropropene (TNP) have been both experimentally and theoretically studied within the Molecular Electron Density Theory
Karolina Zawadzińska, Mar Ríos-Gutiérrez, Karolina Kula, Przemysław Woliński, Barbara Mirosław, Tomasz Krawczyk, Radomir Jasiński   +6 more
doaj   +1 more source

Synthesis, DFT Study and Antibacterial Activity of some Isoxazoline Derivatives Containing 1,4-benzothiazin-3-one Nucleus Obtained Using 1,3-dipolar Cycloaddition Reaction [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2020
Novel series of isoxazoline derivatives containing 1,4-benzothiazin-3-one ring (6a-h) were synthesized via 1,3-dipolar cycloaddition reactions of arylnitrile oxides 5a-d on 4-allyl-2-(substituted)-1,4-benzothiazin-3-ones 3 and 4 led to polyheterocyclic ...
Sebbar Nada Kheira, Taha Mohamed Labd, Ellouz Mohamed, Essassi El Mokhtar, Zerzouf Abdelfettah, Karrouchi Khalid, Ouzidan Younes, Mennane Zakaria, T. Mague Joel   +8 more
doaj   +1 more source

[3 + 2] Cycloaddition reactions of nitrile oxides generated in situ from aldoximes with alkenes and alkynes under ball-milling conditions

Green Chemistry Letters and Reviews, 2022
A convenient and efficient [3 + 2] cycloaddition reaction of alkenes and alkynes with the in situ generated nitrile oxides from aldoximes in the presence of NaCl, Oxone and Na2CO3 has been developed to afford a series of isoxazoles and isoxazolines at ...
Run-Kai Fang, Zheng-Chun Yin, Jun-Shen Chen, Guan-Wu Wang   +3 more
doaj   +1 more source

Functionalisation of Artemisinin and Its Ring-contracted Derivatives

Molecules, 2007
Isoxazoline analogues of artemisinin were obtained in low yield and low diastereoselectivity from the 1,3-dipolar cycloaddition of nitrile oxides. Alternatively, starting from the aldehyde 7, a number of transformations - Wittig reaction and reduction ...
Wim Dehaen, Sarah Van Mierloo, Tine Van Neck   +2 more
doaj   +1 more source

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

, 2016
An unprecedented intermolecular cyclizative capture of the cyanamide anion and several nitrile oxides enables the synthesis of oxadiazol-5 ...
Moses, J. E., Bhat, SV, Bhat, S. V., Robinson, D, Moses, JE, Sharma, P, Sharma, P., Robinson, D.   +7 more
core   +4 more sources

Unveiling the Different Chemical Reactivity of Diphenyl Nitrilimine and Phenyl Nitrile Oxide in [3+2] Cycloaddition Reactions with (R)-Carvone through the Molecular Electron Density Theory

Molecules, 2020
The [3+2] cycloaddition (32CA) reactions of diphenyl nitrilimine and phenyl nitrile oxide with (R)-carvone have been studied within the Molecular Electron Density Theory (MEDT). Electron localisation function (ELF) analysis of these three-atom-components
Mar Ríos-Gutiérrez, Luis R. Domingo, M’hamed Esseffar, Ali Oubella, My Youssef Ait Itto   +4 more
doaj   +1 more source

Synthesis of highly functionalized β-aminocyclopentanecarboxylate stereoisomers by reductive ring opening reaction of isoxazolines

Beilstein Journal of Organic Chemistry, 2012
A rapid and simple procedure was devised for the synthesis of multifunctionalized cyclic β-amino esters and γ-amino alcohols via the 1,3-dipolar cycloaddition of nitrile oxides to β-aminocyclopentenecarboxylates.
Melinda Nonn, Loránd Kiss, Reijo Sillanpää, Ferenc Fülöp   +3 more
doaj   +1 more source

Facile and green synthesis of 3,5-disubstituted isoxazoles using doped nano-sized copper(I) oxide (Cu2O) on melamine–formaldehyde resin as an efficient nano-catalyst under ultrasonic irradiation [PDF]

شیمی کاربردی روز, 2019
In the present research, doped nano-sized copper(I) oxide (Cu2O) on melamine–formaldehyde resin as a heterogeneous and efficient nano-catalyst has been employed for green and mild synthesis of 3,5-disubstituted isoxazoles under ultrasonic irradiation. In
Somayeh Behrouz
doaj   +1 more source

Oxidation of α-Oxo-Oximes to Nitrile Oxides with Hypervalent Iodine Reagents

, 2016
Upon reaction with PhI(OAc)2, α-oxo-aldoximes are oxidized to α-oxo-nitrile oxides, while α-oxo-ketoximes are converted into nitrile oxides via the oxidative cleavage of the carbonyl−imino σ bond.
Tim Jen (2236612), Brian A. Mendelsohn (2236609), Marco A. Ciufolini (117202)   +2 more
core   +1 more source