Results 81 to 90 of about 54,606 (348)

Hemi-Synthesis and Anti-Oomycete Activity of Analogues of Isocordoin [PDF]

, 2017
Indexación: Web of Science; Scopus.An efficient synthesis of a series of 4-oxyalkyl-isocordoin analogues (2–8) is reported for the first time. Their structures were confirmed by1H-NMR,13C-NMR, and HRMS.
Escobar, B., Godoy, P., Madrid, A., Montenegro, I., Olguín, Y., Villena, J., Werner, E.   +6 more
core   +6 more sources

Chalcones as versatile synthons for the synthesis of 5- and 6-membered nitrogen heterocylces [PDF]

, 2014
Chalcones belong to the flavonoid family which constitutes one of the major classes of naturally occurring oxygen heterocyclic compounds. The alpha,beta-unsaturated carbonyl system of chalcones possesses two electrophilic reactive centers allowing them ...
Albuquerque, Hélio, Cavaleiro, José, Santos, Clementina M.M., Silva, Artur   +3 more
core   +1 more source

Atomic Scale Engineering of Multivalence‐State Palladium Photocatalyst for Transfer Hydrogenation with Water as a Proton Source

Advanced Materials, EarlyView.
Photocatalytic transfer hydrogenation is achieved over a multivalence‐state palladium photocatalyst, in which protons generated from photocatalytic water splitting are added to unsaturated double bonds. The operando light‐induced Electron Paramagnetic Resonance (EPR) spectroscopy confirms the synergistic action between Pd single atoms and nanoparticles,
En Zhao, Wenjing Kong, Giorgio Zoppellaro, Yue Yang, Bing Nan, Lina Li, Wengjun Zhang, Zhaohui Chen, Aristides Bakandritsos, Zhu‐Jun Wang, Matthias Beller, Radek Zbořil, Zupeng Chen   +12 more
wiley   +1 more source

Biological Role of Chalcones in Medicinal Chemistry

Vector-Borne Diseases - Recent Developments in Epidemiology and Control, 2020
Chalcones are promising synthons and bioactive scaffolds of great medicinal interest due to their numerous pharmacological and biological activities.
S. Tekale, S. Mashele, O. Pooe, S. Thore, P. Kendrekar, R. Pawar   +5 more
semanticscholar   +1 more source

Synthesis and Characterization of Novel Heterocyclic Chalcones from 1-Phenyl-1H-pyrazol-3-ol

Molecules, 2022
An efficient synthetic route to construct diverse pyrazole-based chalcones from 1-phenyl-1H-pyrazol-3-ols bearing a formyl or acetyl group on the C4 position of pyrazole ring, employing a base-catalysed Claisen–Schmidt condensation reaction, is described.
Arminas Urbonavičius, Graziana Fortunato, Emilija Ambrazaitytė, Elena Plytninkienė, Aurimas Bieliauskas, Vaida Milišiūnaitė, Renzo Luisi, Eglė Arbačiauskienė, Sonata Krikštolaitytė, Algirdas Šačkus   +9 more
doaj   +1 more source

Heterogeneous Copper‐Catalyzed 1,4‐Conjugate Additions of Grignard Reagents to Cyclic and Linear Enones

Advanced Synthesis &Catalysis, EarlyView.
The 1,4‐conjugate addition of Grignard reagents to various cyclic and linear enones using a heterogeneous catalyst is reported. Recyclable copper nanoparticles immobilized on polysaccharide support (e.g., cellulose, chitosan) enable high chemo‐ and regioselectivity.
Luca Deiana, Abdolrahim A. Rafi, Haibo Wu, Shobhan Mondal, Jan‐E. Bäckvall, Armando Córdova   +5 more
wiley   +1 more source

Synthesis and Biological Evaluation of Some New Chalcones Containing 2,5-Dimethylfuran Moiety

E-Journal of Chemistry, 2011
A series of new chalcones (3a-g) were prepared by Claisen-Schmidt condensation of 3-acetyl-2,5-dimethylfuran with various substituted aromatic aldehydes in presence of aqueous solution of potassium hydroxide and ethanol at room temperature.
S. Sridhar, S. C. Dinda, Y. Rajendra Prasad   +2 more
doaj   +1 more source

Mechanochemical synthesis of indolyl chalcones with antiproliferative activity

Green Chemistry Letters and Reviews, 2022
An efficient eco-friendly one-step mechanochemical synthesis of indole hybrid chalcones via the Claisen–Schmidt condensation of 1-methylindole-3-carboxaldehyde with various substituted acetophenones is described using liquid assisted grinding in a high ...
Zuzana Kudličková, Martin Stahorský, Radka Michalková, Mária Vilková, Matej Baláž   +4 more
doaj   +1 more source

Simple chalcones and bis-chalcones ethers as possible pleiotropic agents [PDF]

Journal of Enzyme Inhibition and Medicinal Chemistry, 2015
The synthesis, the antioxidative properties and the lipoxygenase (LOX) and acetylcholinesterase (AChE) inhibition of a number of 4-hydroxy-chalcones diversely substituted as well as of a series of bis-chalcones ether derivatives are reported. The chalcones derivatives were readily produced using a Claisen-Schmidt condensation in a ultra sound bath in ...
Dimitra Hadjipavlou-Litina, Caterina Koukoulitsa, Efstathia Voulgari, Constantinos Avgoustakis, Thalia Liargkova   +4 more
openaire   +2 more sources

Exploring Gelatin‐A and Mouse Proline‐Rich Protein 5 as Probes for Wine Polyphenol Analysis by Quartz Crystal Microbalance with Dissipation Monitoring

Advanced Sensor Research, EarlyView.
This study presents a novel strategy for the detection of polyphenols in wine. By combining Quartz Crystal Microbalance with Dissipation Monitoring and original functionalization strategies, Gelatin A from porcine skin and Mouse Proline‐Rich Protein 5, polyphenols are successfully detected directly in wine without any prior sample preparation ...
Giorgia Tori, Mariacristina Gagliardi, Francesco Lunardelli, Chiara Sanmartin, Isabella Taglieri, Gianmarco Alfieri, Margherita Modesti, Domenica Convertino, Andrea Bellincontro, Fabio Mencarelli, Marco Cecchini   +10 more
wiley   +1 more source