Results 21 to 30 of about 5,507 (218)

A Graphene Acid - TiO₂ Nanohybrid as Multifunctional Heterogeneous Photocatalyst for the Synthesis of 1,3,4-Oxadiazoles

, 2022
The immobilization of TiO2 nanoparticles on graphene acid (GA), a conductive graphene derivative densely functionalized with COOH groups, is presented.
Víctor A. de la Peña O’ Shea (13150095), José Alemán (1447594), Mariam Barawi (1717501), Matías Blanco (1950487), Martina Sciarretta (8697237), Cristina Navío (2351332)   +5 more
core   +1 more source

SET activation of nitroarenes by 2-azaallyl anions as a straightforward access to 2,5-dihydro-1,2,4-oxadiazoles

Nature Communications, 2021
Oxadiazoles are five-membered ring heterocycles comprising an oxygen and two nitrogens, and those with the 1,2,4-oxadiazole skeleton are of interest due to their prevalence in biologically active compounds.
Dong Zou, Lishe Gan, Fan Yang, Huan Wang, Youge Pu, Jie Li, Patrick J. Walsh   +6 more
doaj   +1 more source

Cu(OH)x: Clay Catalyst Promoted Synthesis of 4,5-dihydro-1,2,4-oxadiazole at Room Temperature

Orbital: The Electronic Journal of Chemistry, 2017
An easy and efficient scheme is described designed for the preparation of 4,5-dihydro-1,2,4-oxadiazole using recyclable Cu(OH)x-Clay heterogeneous catalyst at room temperature.
Bashir Ahmad Dar, Zahed Zaheer, Samreen Fatema, Mazahar Farooqui   +3 more
doaj   +3 more sources

Design, Synthesis and Anticancer Evaluation of Novel Bis-Thiazol-1,2,4-Triazine Hybrids Contained 1,3,4-Oxadiazoles

, 2022
A new library of bis-thiazol-1,2,4-triazinehybrids having 1,3,4-oxadiazoles (10a–j) has been designed and synthesized. They were examined for their preliminary anticancer properties against four selected human cancer cell lines including SiHa (cervix ...
Suresh Bairi (14007462), Veerachamy Alagarsamy (14007465), Rachamalla Shyam Sunder (14007468)   +2 more
core   +1 more source

Synthesis, characterization and in vivo antitumor effect of new α,β-unsaturated-2,5-disubstituted-1,3,4-oxadiazoles

, 2022
New α,β-unsaturated-2,5-disubstituted-1,3,4-Oxadiazoles (4a–j) and (10a–d) have been prepared in good to excellent yields starting from β-chlorovinyl aldehydes and hydrazide.
M. Fray (12315396), D. Lesur (12315411), R. Abidi (12315417), I. Hamzi (12315402), N. Srairi-Abid (12315408), I. ELBini-Dhouib (12315399), M. Benazza (12315414), T. Barhoumi-Slimi (5028845), R. Doghri (12315405)   +8 more
core   +1 more source

Synthesis and Antimicrobial Evaluation of Some New Oxadiazoles Derived from Phenylpropionohydrazides

Molecules, 2009
In this study a series ofnew1-(2-aryl-5-phenethyl-1,3,4-oxadiazol-3(2H)-yl)ethanones 2a-e was synthesized by the cyclization of imines 1a-e using acetic anhydride. The products were evaluated for anti-bacterial and anti-fungal activity.
Mohammad Ali, Mohammad Shaharyar, Neeraj Kumar Fuloria, Vijender Singh   +3 more
doaj   +1 more source

Metal-free hydroarylation of the side chain carbon–carbon double bond of 5-(2-arylethenyl)-3-aryl-1,2,4-oxadiazoles in triflic acid

Beilstein Journal of Organic Chemistry, 2017
The metal-free reaction of 5-(2-arylethenyl)-3-aryl-1,2,4-oxadiazoles with arenes in neat triflic acid (TfOH, CF3SO3H), both under thermal and microwave conditions, leads to 5-(2,2-diarylethyl)-3-aryl-1,2,4-oxadiazoles.
Anna S. Zalivatskaya, Dmitry S. Ryabukhin, Marina V. Tarasenko, Alexander Yu. Ivanov, Irina A. Boyarskaya, Elena V. Grinenko, Ludmila V. Osetrova, Eugeniy R. Kofanov, Aleksander V. Vasilyev   +8 more
doaj   +1 more source

Microwave-Assisted Synthesis of Unsymmetrical 5-Phenyl-1,3,4-oxadiazoles Containing Bis(carboxymethyl)amino Group

Applied Sciences, 2023
New derivatives of 5-phenyl-1,3,4-oxadiazole substituted at position 2 with (bromomethyl)phenyl or bromoalkyl groups were obtained via microwave-assisted cyclodehydration of unsymmetrical N,N′-diacylhydrazines.
Marcin Łuczyński, Agnieszka Kudelko
doaj   +1 more source

Cu(OH)x-clay catalyst promoted synthesis of 4,5-dihydro-1,2,4-oxadiazole at room temperature

Green Processing and Synthesis, 2018
An easy and efficient scheme is described and designed for the preparation of 4,5-dihydro-1,2,4-oxadiazole using recyclable Cu(OH)x-clay heterogeneous catalyst at room temperature.
Dar Bashir Ahmad, Zaheer Zahed, Fatema Samreen, Farooqui Mazahar   +3 more
doaj   +1 more source

Electrocyclization of Semicarbazone; A Novel Route of Green Synthesis of 2,5-Disubstituted-1,3,4-Oxadiazoles

International Journal of Electrochemical Science, 2011
The anodic oxidation of a number of arylsemicarbazides derivatives (I) has been examined in acetonitril containing lithium perchlorate (LiClO4) as a supporting electrolyte (20g/l).
Benmekhbi Lotfi, Bencharif Mustafa, Bencharif Leila, Mosbah Salima   +3 more
doaj   +1 more source