Results 11 to 20 of about 7,972 (156)

Nitrones as Versatile Linkages for the Construction of Covalent Organic Polymers by Tandem Transformations

open access: yesChemistryEurope
The development of novel covalent organic polymers (COPs) incorporating nitrone linkages and their chemical transformation into new materials through tandem reactions is reported.
Beatriz de Santos   +6 more
doaj   +2 more sources

Homoleptic Bismuth Alkynes: Isolable Reagents for Selective Alkynyl Radical Transfer. [PDF]

open access: yesAngew Chem Int Ed Engl
The first series of fully characterized homoleptic alkynyl bismuth compounds Bi(C≡CR)3 is presented. Facile homolytic Bi–C bond cleavage grants access to alkynyl radicals, which have been employed in selective C–X bond formation (X = C, B, Se, Te). This complements existing strategies for alkynyl radical generation as it proceeds under mild and purely ...
Kundu G   +5 more
europepmc   +3 more sources

Study of the physico-chemical characteristics of reinforced composite polymer materials [PDF]

open access: yesE3S Web of Conferences, 2023
One of the important properties of reinforced composite polymer materials is their physico-chemical properties. Their structure plays an important role in assessing the physico-chemical properties of composite materials.
Khalimov Shukhrat   +4 more
doaj   +1 more source

One-Pot Synthesis of Novel Multisubstituted 1-Alkoxyindoles

open access: yesMolecules, 2021
Studies on a one-pot synthesis of novel multisubstituted 1-alkoxyindoles 1 and their mechanistic investigations are presented. The synthesis of 1 was successfully achieved through consecutive four step reactions from substrates 2.
Ye Eun Kim   +4 more
doaj   +1 more source

Fast Method for Synthesis of Alkyl and Aryl-N-Methylnitrones

open access: yesMolecules, 2011
A simple, fast, efficient and eco-friendly procedure was developed for the synthesis of alkyl and aryl-N-methylnitrones. The corresponding nitrones of aromatic aldehydes, aliphatic aldehydes and alicyclic carbonyl compounds were prepared from N ...
Yilmaz Yildirir   +3 more
doaj   +1 more source

A Simple Method of Synthesis of 3-Carboxy-2,2,5,5-Tetraethylpyrrolidine-1-oxyl and Preparation of Reduction-Resistant Spin Labels and Probes of Pyrrolidine Series

open access: yesMolecules, 2021
Stable free radicals are widely used as molecular probes and labels in various biophysical and biomedical research applications of magnetic resonance spectroscopy and imaging.
Sergey A. Dobrynin   +11 more
doaj   +1 more source

(Z)-1-(1,3-Diphenyl-1H-pyrazol-4-yl)-N-phenylmethanimine N-oxide

open access: yesIUCrData, 2018
In the title nitrone, C22H17N3O, the dihedral angles between the central pyrazole ring and pendant N-bound, C-bound and nitrone-bound phenyl rings are 20.93 (6), 41.27 (6), and 32.57 (6)°, respectively.
Shaaban K. Mohamed   +5 more
doaj   +1 more source

Effect of the Nature of Surfactant on the Reactivity of C,N-diphenylnitrone towards Acrylonitrile in Different Microemulsions Systems

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2018
The present work provides an insight into the effect of the nature of surfactant (cationic, anionic), a component of water- and oil-borne microemulsions, on the reaction rate of 1,3-dipolar cycloaddition of C,N-diphenylnitrone with acrylonitrile.
Kahina Hamza   +5 more
doaj   +1 more source

Synthesis and Antioxidant Properties of HeteroBisNitrones Derived from Benzene Dicarbaldehydes

open access: yesAntioxidants, 2022
We report herein the synthesis and antioxidant profile of nine novel heterobisnitrones (hBNs) as new α-phenyl-tert-butylnitrone (PBN) analogues. The synthesized hBNs 1–9 were evaluated for their antioxidant activity using different in vitro techniques ...
Daniel Diez-Iriepa   +4 more
doaj   +1 more source

Synthesis and Application of Phenyl Nitrone Derivatives as Acidic and Microbial Corrosion Inhibitors

open access: yesJournal of Chemistry, 2015
Nitrone has drawn great attention due to its wide applications as a 1,3-dipole in heterocyclic compounds synthesis and the bioactivities. With the special structure, nitrone can also be used as ligand in inorganic chemistry. Based on the current research,
Shijun Chen, Kang Zhao, Gang Chen
doaj   +1 more source

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