Results 51 to 60 of about 30,682 (325)

Some Features of Liquid Crystalline Oxadiazoles [PDF]

, 2013
We propose a survey of some features of those oxadiazole compounds which are mesogenic, that is, which are displaying liquid crystalline properties induced by their rod- or disk-like molecules.
SPARAVIGNA, Amelia Carolina
core   +3 more sources

Inverse electron-demand 1,3-dipolar cycloaddition of nitrile oxide with common nitriles leading to 3-functionalized 1,2,4-oxadiazoles [PDF]

, 2011
A carbamoyl-substituted nitrile oxide was generated upon treatment of easily available 2-methyl-4-nitro-3-isoxazolin-5(2H)-one with THF (not dried); the reaction proceeded efficiently even in the absence of any special reagents and reaction conditions ...
1020, 1021, 1022, 1023, 1024, 1025, 1026, 1027, Ariga, Masahiro, Hirao, Shotaro, Ise, Yumiko, Kobiro, Kazuya, Nishiwaki, Nagatoshi, Okajima, Yoshikazu, Saigo, Kazuhiko, Sawayama, Jun   +15 more
core   +1 more source

[3 + 2]-Cycloaddition of 2 H-Azirines with Nitrosoarenes: Visible-Light-Promoted Synthesis of 2,5-Dihydro-1,2,4-oxadiazoles.

Organic Letters, 2019
A formal [3 + 2]-cycloaddition reaction of 2 H-azirines with nitrosoarenes has been achieved under irradiation by visible light with the assistance of organic dye photoredox catalyst.
Bao-Gui Cai, Ze-Le Chen, Guomei Xu, Jun Xuan, W. Xiao   +4 more
semanticscholar   +1 more source

Synthesis and Antimicrobial Evaluation of Some Heterocyclic Chalcone Derivatives

Molecules, 2011
Some new heterocyclic compounds containing isoxazole, pyrazole and oxadiazole ring systems were prepared from various chalcones. The synthesized compounds have been characterized by elemental analysis and spectral methods.
Essam Mohamed Sharshira, Nagwa Mohamed Mahrous Hamada   +1 more
doaj   +1 more source

Therapeutic potential of oxadiazole or furadiazole containing compounds

BMC Chemistry, 2020
As we know that, Oxadiazole or furadi azole ring containing derivatives are an important class of heterocyclic compounds. A heterocyclic five-membered ring that possesses two carbons, one oxygen atom, two nitrogen atoms, and two double bonds is known as ...
Ankit Siwach, Prabhakar Kumar Verma
doaj   +1 more source

Electrophilic activation of nitroalkanes in efficient synthesis of 1,3,4-oxadiazoles

RSC Advances, 2019
A novel methodology for general and chemoselective preparation of non-symmetric 1,3,4-oxadiazoles is developed. This unusual reaction proceeds via polyphosphoric acid-assisted activation of nitroalkanes towards nucleophilic attack with acylhydrazides.
Alexander V Aksenov, V. Khamraev, N. Aksenov, N. K. Kirilov, D. A. Domenyuk, V. Zelensky, M. Rubin   +6 more
semanticscholar   +1 more source

Novel 1,3,4-Oxadiazole Induces Anticancer Activity by Targeting NF-κB in Hepatocellular Carcinoma Cells

Frontiers in Oncology, 2018
Aberrant activation of NF-κB is linked with the progression of human malignancies including hepatocellular carcinoma (HCC), and blockade of NF-κB signaling could be a potential target in the treatment of several cancers.
Chakrabhavi Dhananjaya Mohan, Nirvanappa C. Anilkumar, Shobith Rangappa, Muthu K. Shanmugam, Srishti Mishra, Arunachalam Chinnathambi, Sulaiman Ali Alharbi, Atanu Bhattacharjee, Gautam Sethi, Alan Prem Kumar, Alan Prem Kumar, Basappa, Basappa, Kanchugarakoppal S. Rangappa   +13 more
doaj   +1 more source

Hypervalent iodine(V) mediated mild and convenient synthesis of substituted 2-amino-1,3,4-oxadiazoles [PDF]

, 2012
A simple protocol for the synthesis of 2-amino-1,3,4-oxadiazoles starting from the corresponding acylhydrazides by cyclodesulfurization of intermediate acylthiosemicarbazides mediated by o-iodoxybenzoic acid in good yields has been described.
Prabhu, G., Sureshbabu, V.V.
core   +1 more source

A facile synthesis of N-Z/Boc-protected 1,3,4-oxadiazole-based peptidomimetics employing peptidyl thiosemicarbazides [PDF]

, 2010
Synthesis of 1,3,4-oxadiazole containing peptidomimetics is described by a p-TsCl/pyridine-mediated cyclization of the corresponding dipeptidyl thiosemicarbazides, which are readily prepared by coupling N-protected amino acid hydrazides with amino acid ...
Lamani, R.S., Nagendra, G., Sureshbabu, V.V.   +2 more
core   +1 more source

Synthesis of 1,2,4-Oxadiazoles by Tandem Reaction of Nitroalkenes with Arenes and Nitriles in the Superacid TfOH.

Journal of Organic Chemistry, 2019
The tandem reaction of nitroalkenes with arenes and nitriles in the superacid CF3SO3H (TfOH) results in the formation of 1,2,4-oxadiazole derivatives in yields up to 96%.
Andrei A Golushko, O. Khoroshilova, A. Vasilyev   +2 more
semanticscholar   +1 more source