Results 111 to 120 of about 21,056 (199)

Organic Mixed‐Valence π‐Electron Systems—Current Status and Challenges

Asian Journal of Organic Chemistry, Volume 15, Issue 10, October 2026.
This review discusses the progress and challenges in organic mixed‐valence π‐electron systems, focusing on trends such as the exploration of multi‐redox‐centered mixed‐valence multi‐radical states arising from the interplay between charge transfer and spin interactions and the realization of novel mixed‐valence states through the effective utilization ...
Akihiro Ito
wiley   +1 more source

Studies on quinones. Part 39: Synthesis and leishmanicidal activity of acylchloroquinones and hydroquinones

, 2005
Acylhydroquinone-based compounds are attractive targets for the design of new leishmanicidal drugs. We have previously described sesquiterpene quinones and hydroquinones series, which exhibit different degree of potency against Leishmania amazonensis ...
Valderrama, JA, Gonzalez, MF, Zamorano, C, Prina, E, Fournet, A   +4 more
core   +1 more source

Synergistic Enhancement of Antioxidant Activity in Arbutus unedo Leaf Extract by Biological Fluids: Implications for Functional and Nutraceutical Applications

Biotechnology and Applied Biochemistry, Volume 73, Issue 5, Page 2189-2201, October 2026.
ABSTRACT This study examined the effect of biological fluids (saliva, blood plasma, and urine) on the antioxidant capacity of an aqueous extract derived from Arbutus unedo leaves. The extract displayed a concentration‐dependent reducing activity in the ferric reducing power assay (IC50 = 292 ± 7.54 µg/mL) and phosphomolybdenum assays (IC50 = 461.67 ± 4.
Idir Moualek, Hamdi Bendif, Karima Benarab, Giulio Lupidi, Fehmi Boufahja, Stefania Garzoli, Karim Houali   +6 more
wiley   +1 more source

tris‐Schiff Base Derivatives Containing Flurbiprofen as Potential Tyrosinase Inhibitors: Synthesis, In Vitro Evaluation, Molecular Docking, DFT and Dynamics Simulations

Chemistry &Biodiversity, Volume 23, Issue 10, October 2026.
New tris‐Schiff base derivatives of marketed accessible flurbiprofen were synthesised in better yields through multi‐step reactions. Structures of these compounds were deduced through 13C‐NMR and 1H‐NMR spectroscopic methods and finally screened for their in vitro tyrosinase inhibitory potential.
Aftab Alam, Muhammad Ayaz, Zainab, Majid Khan, Ahmed A. Elhenawy, Najeeb Ur Rehman, Sajjad Ur Rahman, Mumtaz Ali, Ahmed Al‐Harrasi, Manzoor Ahmad   +9 more
wiley   +1 more source

Deoxyspongiaquinones : new sesquiterpene/quinones and hydroquinones from a southern Australian marine sponge, Eurospongia sp.

, 1996
Chemical investigation of a marine sponge, Euryspongia sp., collected from the Great Australian Bight, Australia, resulted in the isolation of two new sesquiterpene quinones, deoxyspongiaquinone (4) and (E)-chlorodeoxyspongiaquinone (5), as well as two ...
Hooper, J. N. A, Capon, R. J., Hobbs, L., Urban, S.   +3 more
core   +1 more source

Exploring the Cosmeceutical Potential of Six Malaysian Indigenous Tropical Fruit Trees: Radical Scavenging, Anti‐Tyrosinase, and Photoprotective Activities Evaluation

Chemistry &Biodiversity, Volume 23, Issue 10, October 2026.
B. macrophylla leaf ethyl acetate fractionated extract exhibits the highest TPC, very strong radical‐scavenging activities, and the highest SPF value of 28.64 ± 0.51. LC‐MS analysis identifies m‐trigallic acid, cis‐coutaric acid, and ellagic acid, which may contribute to its bioactivities. The present work highlights B.
Wei Lee Chong, Zhi Ning Teoh, Nurul Ainanajwa Ramli, Sugumaran Manickam, Siew Huah Lim, Chun Hoe Tan, Kae Shin Sim, Hazwani Mat Saad   +7 more
wiley   +1 more source

Phytochemical Investigation of Stachys hissarica: Antioxidant Activity, Flavonoid Characterization, and In Silico Analysis

Chemistry &Biodiversity, Volume 23, Issue 10, October 2026.
Stachys hissarica demonstrates remarkable antioxidant potential, driven by a rich profile of 35 annotated polyphenolic metabolites within its aqueous methanolic extract. Hydrophilic phenolics exhibit superior radical‐scavenging activity comparable to ascorbic acid. Integrated computational simulations reveal favorable oral bioavailability, low toxicity,
Elbek A. Mukhammadiev, Michal Šoral, Francesco Cacciola, Katia Arena, Chao Liu, Mengqi Zhang, Ruirui Zhang, Doniyor R. Siddikov, Sobirdjan A. Sasmakov, Nilufar Z. Mamadalieva   +9 more
wiley   +1 more source

Catechols, Catecholamines, and Hydroxylated Naphthalene Derivatives as Building Blocks for the Electrochemical Deposition of Thin Films: Mechanisms and Properties

ChemElectroChem, Volume 13, Issue 19, 1 October 2026.
This review describes cyclic voltammetry or chronamperometry of phenol derivatives, catecholamines, and hydroxylated naphthalenes on electrodes. Under strong oxidative conditions the solutes are mineralized, but in the electrochemical stability window of the solvent, the electrode undergoes passivation or deposition of porous (eventually conductive ...
Vincent Ball
wiley   +1 more source

Direct Anodic Decarboxylative Alkylation Reaction to Pharmaceutically Relevant Quinones

ChemistryEurope, Volume 4, Issue 10, October 2026.
This work reports a surface‐depended, direct anodic oxidation of carboxylic acids for the modification of quinones without prefunctionalization while retaining their functionality. Since the reaction does not rely on transition metals, halides are widely tolerated, allowing straightforward access to asymmetrically modified, pharmaceutically relevant ...
Julian Buchholz, Carla M. Stork, Avra Tzaguy, Thomas Weyhermüller, Volker Derdau, Philipp Schnieders, Roman Goy, Jan Schütz, Siegfried R. Waldvogel   +8 more
wiley   +1 more source

Nitrooxylation in Organic Synthesis: From Classical Nitrate Ester Formation to Modern Catalytic Strategies

Chemistry – A European Journal, Volume 32, Issue 37, 1 October 2026.
Nitrooxylation—the installation of nitrate esters (–ONO2) has evolved from classical mixed‐acid protocols to catalytic and mechano‐, flow‐, photo‐, and electrochemical strategies. This review delineates ionic and radical manifolds for C–ONO2 bond formation, emphasizing mechanistic control, selected substrate scope, and selectivity.
Jayanta Dey, Dmitry Katayev
wiley   +1 more source