Results 41 to 50 of about 5,639 (212)

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 of natural products via isoxazoles

, 1987
Synthetic routes to natural products using isoxazole derivatives as key intermediates are reviewed. 1. Introduction 2. General Considerations 2.1. Methods of Preparation 2.2. Functionalization 2.3. Ring Opening Procedures 3. Synthesis of Natural Products
BENETTI, Simonetta, POLLINI, Gian Piero, BARALDI, Pier Giovanni, BARCO, Achille, SIMONI, Daniele   +4 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

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

Síntese regiosseletiva de cristais líquidos contendo o heterociclo isoxazol [PDF]

, 2008
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em QuímicaMoléculas com características líquido-cristalinas têm ultimamente atraído um grande interesse por parte de ...
Bryk, Fernando Rebouças
core  

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  

Síntese de derivados heterocíclicos com potencial atividade antitripanossomatídeos [PDF]

, 2014
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Farmácia, Florianópolis, 2014.Os fármacos utilizados nos tratamentos atuais de tripanossomatídeos, Trypanosoma cruzi (doença de ...
Zimmermann, Lara Almida
core  

Silver-Catalyzed Synthesis of Disubstituted Fluorinated Isoxazoles [PDF]

, 2020
The presence of fluorine can provide organic compounds with useful biological properties, such as increased metabolic stability and drug uptake. Because of these advantages, fluorinated compounds make up about 30% of the drug industry.
Stewart, Micah
core   +1 more source

Design, Synthesis and Biological Activity of Regioisomeric 3,5-Disubstituted Isoxazoles and 5-(Hydroxy)Isoxazolines with Aryl and Either (Diterpenylfuran-2-Carbonyl) or (Methylfuran-2-Carbonyl) Moiety

Scientia Pharmaceutica
Alkyn-1,2-diones have gained great attention as useful building blocks in organic synthesis. Regioselective synthetic routes towards 3,5-disubstituted isoxazoles, containing the methylfuroyl or diterpenylfuroyl moiety at the C-3 or C-5 position from ...
Maksim E. Mironov, Dmitry S. Baev, Mohammad S. Hamad, Sergey A. Borisov, Vyacheslav I. Krasnov, Tatyana V. Rybalova, Maksim P. Pitukhin, Irina V. Sorokina, Tatyana G. Tolstikova, Andrey G. Pokrovsky, Anastasia I. Poltanovich, Elvira E. Shults   +11 more
doaj   +1 more source

Carbon Anodes for Low‐Temperature Nonaqueous Alkali Metal‐Ion Batteries

EcoEnergy, EarlyView.
This review summarizes recent progress in carbon anodes for low‐temperature nonaqueous alkali‐metal ion batteries. Fundamental thermodynamic and kinetic limitations are examined, alongside a systematic discussion of graphite, hard carbon, and emerging carbon architectures.
Zhichun Miao, Dandan Yu, Guojie Liu, Yuyang Qin, Jingyun Mou, Wenlong Song, Lu Shi, Zengqin Xiao, Xin Yuan, Huayu Chen, Laishun Qin, Da Chen   +11 more
wiley   +1 more source