Results 11 to 20 of about 7,868 (205)

Electrochemistry and Antioxidant Activities of Substituted Furanyl Nitrone: The Role of the Nitro Group

ChemElectroChem
This work compares electrochemical and antioxidant data for synthetic furfural‐derived nitrone (LQB‐109), the novel N‐methyl‐nitroaryl‐furanyl‐nitrone (LQB‐569), and the parent aldehyde (5NBFAL). Cyclic voltammograms (CVs) are obtained on a glassy carbon
Danyelle Cândido Santos, Débora de Souza dos Santos Costa, Paulo R. R. Costa, Ayres Guimarães Dias, Messias de Oliveira Silva, Taualia Achira Aly, Vinícius Del Colle, Jadriane Almeida Xavier, Marília O. F. Goulart, Thaissa Lúcio Silva   +9 more
doaj   +2 more sources

Total Synthesis of Isodaphlongamine H by Iridium-Catalyzed Reductive [3 + 2] Cycloaddition of N-Hydroxylactam. [PDF]

Angew Chem Int Ed Engl
The total synthesis of isodaphlongamine H was accomplished by a lactam strategy. This strategy started with alkylation and N‐oxidation of a readily available chiral lactam. For the key functionalization of the amide carbonyl, an iridium‐catalyzed reductive [3 + 2] cycloaddition of the N‐hydroxylactam afforded the tricyclic isoxazolidine, which was ...
Iwamoto S, Nakano R, Sasaki K, Kobayashi S, Taira Y, Takei K, Kawakita R, Tokuyama A, Nakamura H, Tomoike M, Kawahara R, Murase A, Simizu S, Chida N, Okamura T, Sato T.   +15 more
europepmc   +3 more sources

Kinetics and mechanism of the oxidation of some substituted aldonitrones by quinolinium chlorochromate in aqueous DMF medium in the absence and presence of oxalic acid [PDF]

Journal of the Serbian Chemical Society, 2009
The kinetics of the oxidation of aldonitrones (nitrone) by quinolinium chlorochromate (QCC) was determined in 50 % DMF-water in the absence and presence of oxalic acid in order to study the effect of oxalic acid.
Rajarajan Govindasamy, Jayachandramani Natesan, Manivarman Subramanian, Jayabharathi Jayaraman, Thanikachalam Venugopal   +4 more
doaj   +3 more sources

Insights into the Antioxidant Mechanism of Newly Synthesized Benzoxazinic Nitrones: In Vitro and In Silico Studies with DPPH Model Radical

Antioxidants, 2021
Synthetic nitrone spin-traps are being explored as therapeutic agents for the treatment of a wide range of oxidative stress-related pathologies, including but not limited to stroke, cancer, cardiovascular, and neurodegenerative diseases. In this context,
Stefania Marano, Cristina Minnelli, Lorenzo Ripani, Massimo Marcaccio, Emiliano Laudadio, Giovanna Mobbili, Adolfo Amici, Tatiana Armeni, Pierluigi Stipa   +8 more
doaj   +1 more source

One-Pot Synthesis of Novel Multisubstituted 1-Alkoxyindoles

Molecules, 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, Hyunsung Cho, Yoo Jin Lim, Chorong Kim, Sang Hyup Lee   +4 more
doaj   +1 more source

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

E3S 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, Nishonov Farkhodkhon, Begmatov Dilmurod, Wani Mohammad Farooq, Ziyamukhamedova Umida   +4 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

Molecules, 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, Mikhail S. Usatov, Irina F. Zhurko, Denis A. Morozov, Yuliya F. Polienko, Yurii I. Glazachev, Dmitriy A. Parkhomenko, Mikhail A. Tyumentsev, Yuri V. Gatilov, Elena I. Chernyak, Elena G. Bagryanskaya, Igor A. Kirilyuk   +11 more
doaj   +1 more source

Synthesis and Characterization of Ruthenium (III) Complexes with Substituted Nitrones [PDF]

مجلة التربية والعلم, 2013
New series of complexes of general [Ru(Cl)2(H2O)2.L]nH2O ; where LH=[α-(2-hydroxy-1-naphthyl)-N-(p-R-phenyl nitrone] n=0-6 and R=H, Cl , Br , COCH3 , NHCOCH3 , NH2  and CH3 were formula synthesized and characterized by their elemental analysis(CHN ...
Khalaf Khallow, Eman Al-Bayate
doaj   +1 more source

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

Molecules, 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, Naki Colak, Hamdi Ozkan, Serkan Yavuz   +3 more
doaj   +1 more source

Orbital symmetry control in the nitrone-oxaziridine system. Nitrone photostationary states [PDF]

Journal of the American Chemical Society, 1971
Recent the orbital symmetry rules have been shown to apply to hetero-atom systems such as nitrone thermal cycloaddition reactions and the thermal and photochemical aziridine ring cleavage at the C-C bond. The concerted photocyclization is disrotatory and the reverse thermal cleavage is conrotatory in these molecules with four {pi} electrons.
Splitter, Janet S, Su, Tah-mun, Ono, Howard, Calvin, Melvin   +3 more
openaire   +5 more sources