Results 1 to 10 of about 20,875 (302)

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

Photocycloaddition of aromatic and aliphatic aldehydes to isoxazoles: Cycloaddition reactivity and stability studies

Beilstein Journal of Organic Chemistry, 2011
The first photocycloadditions of aromatic and aliphatic aldehydes to methylated isoxazoles are reported. The reactions lead solely to the exo-adducts with high regio- and diastereoselectivities. Ring methylation of the isoxazole substrates is crucial for
Axel G. Griesbeck, Marco Franke, Jörg Neudörfl, Hidehiro Kotaka   +3 more
doaj   +1 more source

Polarclean as a Sustainable Reaction Medium for the Waste Minimized Synthesis of Heterocyclic Compounds

Frontiers in Chemistry, 2019
Herein we report the use of Rhodiasolv© Polarclean as a novel polar aprotic solvent for the synthesis of decorated heterocycles via dipolar cycloaddition (isooxazoles) or intramolecular C–H functionalization processes (benzo-fused chromenes).
Francesco Ferlin, Lorenzo Luciani, Orlando Viteritti, Francesco Brunori, Oriana Piermatti, Stefano Santoro, Luigi Vaccaro   +6 more
doaj   +1 more source

Synthesis and biological evaluation of ferrocene-based cannabinoid receptor 2 ligands [PDF]

, 2018
Ferrocene analogues of known fatty acid amide hydrolase inhibitors and CB2 ligands have been synthesized and characterized spectroscopically and crystallographically.
Barczyk, Amélie, Bollier, Mélanie, Coles, Simon J, Dezitter, Xavier, Farce, Amaury, Klupsch, Fredérique, Leleu-Chavain, Natascha, Millet, Regis, Sansook, Supojjanee, Spencer, John, Tizzard, Graham J, Tuo, Wei   +11 more
core   +3 more sources

Synthesis and Antimicrobial Activity of some Ester Functionalized Isoxazoles incorporating Anthracene Moieties via Nucleophilic Substitution Reaction

Zanco Journal of Medical Sciences, 2023
Background and objective: Five-membered heterocycle compounds having single oxygen and nitrogen atom at adjacent positions are known as isoxazoles. Isoxazole compounds have a broad range of biological activities and therapeutic value.
Sarbast M. Ahmed, Hewa Omer Ahmed, Faiq H. S. Hussain, Hayman Sardar Abdulrahman, Hemn A. Qader   +4 more
doaj  

Synthesis of Some Fused Pyrazoles and Isoxazoles

Molecules, 2000
The α-keto methylene group in 3,5-diaryl-2-cyclohexenones 2 and 3,5-diarylcyclohexanones 8 have been used to obtain fused pyrazoles and isoxazoles. The new compounds were characterized by IR and 1H-NMR spectral data.
Dandu Bhaskar Reddy, Katta Venugopal Reddy, Akula Balaiah, Boggu Jagan Mohan Reddy, Venkatapuram Padmavathi   +4 more
doaj   +1 more source

Isoxazoles from 1,1-disubstituted bromoalkenes [PDF]

Tetrahedron Letters, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Sureshbabu, Dadiboyena, Jianping, Xu, Ashton T, Hamme   +2 more
openaire   +2 more sources

Direct Nucleophilic Difluoromethylation of Aromatic Isoxazoles Activated by Electron-Withdrawing Groups Using (Difluoromethyl)trimethylsilane

ScienceOpen Research, 2014
The activation of aromatic diaryl isoxazoles with strong electron-withdrawing groups, such as the nitro, triflyl and the phenylsulfonyl groups, at the 4-position has enabled the first regio- and diastereoselective difluoromethylation at the 5-position of
doaj   +3 more sources

Theoretical and experimental investigation for mild steel in acidic environment using isoxazole sulfonamide derivatives as anticorrosion inhibitors

Next Materials
Two isoxazoles sulfonamides namely N-butyl-2-(N-((3-(p-tolyl)isoxazol-5-yl)methyl)sulfamoyl)benzamide (IS-Cl) and N-butyl-2-(N-((3-(4-chlorophenyl)isoxazol-5-yl)methyl)sulfamoyl)benzamide (IS-CH3) were evaluated as some corrosion inhibitors for mild ...
Rachid Hsissou, Ayoub El Mahmoudi, Issam Saber, Zaki Safi, Mohamed El Faydy, Fouad Benhiba, Nuha Wazzan, Nadia Dkhireche, Khalid Bougrin   +8 more
doaj   +1 more source

Nitroimidazoles XIII. Synthesis of Substituted (1-Methyl-5-Nitro-2-Imidazolyl) Isoxazoles [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 1998
The beta0diketone derivatives of nitroimidazole were synthesized from the reaction of magnesium salt of beta-ketoaccids 3 with imidazolide 4. The raction of beta-diketones with hydroxylamine hydrochloride afforded either the isoxazoles or the 5-hydroxyl ...
Abbas Shafiee, Mohammad ALi Ebrahimzadeh
doaj