Results 101 to 110 of about 21,056 (199)

Anticipating Natural Phenolics Through Visible Light‐Induced Photorearrangement of Quinones

ChemistryEurope
A general protocol for the photorearrangement of substituted benzo‐ and naphthoquinones using monochromatic blue light irradiation in solution was developed.
Alexander A. Fadeev, Martin Kotora
doaj   +1 more source

Selective N‐Functionalization of Pyrazoles

European Journal of Organic Chemistry, Volume 29, Issue 40, 27 October 2026.
This review traces the evolution of regioselective N‐functionalization strategies for pyrazoles, a key class of nitrogen heterocycles widely used in medicinal chemistry. Due to rapid tautomerism, N‐functionalization often lacks selectivity, leading to poor and unpredictable regioisomeric outcomes.
Lucas Popek, Matthias Schrader, Christopher J. Teskey   +2 more
wiley   +1 more source

ANTILEISHMANIAL EPIDIOXYSTEROLS FROM THE COLOMBIAN MARINE SPONGE Ircinia campana ARE OXIDATION PRODUCTS FROM NATURALLY OCCURRING Δ^5,7 STEROLS

Vitae, 2009
Marine sponges of the genus Ircinia are known to contain several classes of metabolites, some of them with interesting biological activities as furanesesterterpenes, polyprenylated hydroquinones, macrolides, sulfur containing terpenoids, and steroids ...
Diana M. MÁRQUEZ F., Alejandro MARTÍNEZ M.   +1 more
doaj  

The Natural Product Esculetin as an Efficient Photoacid for the Visible‐Light‐Mediated Acetalization/Ketalization Reaction

ChemSusChem, Volume 19, Issue 19, 14 October 2026.
Esculetin: an efficient photoacid catalyzing acetalization/ketalization reactions. The development of photochemical protocols for the production of fine chemicals and industrially interesting products, employing sustainable catalysts under mild conditions, is of high interest.
Maria A. Theodoropoulou, E. Alexandros Routsi, Christiana Mantzourani, Olga G. Mountanea, Demeter Tzeli, Christoforos G. Kokotos, George Kokotos   +6 more
wiley   +1 more source

Reaction of hydroquinones with supported oxidizing reagents in solvent-free conditions

, 2000
Supported MnO2 or HNO3 on bentonitic clay cleanly oxidize some hydroquinones under infrared or microwave irradiation to the corresponding quinones with excellent conversion in short reaction times, using an easy and solvent-free ...
Gomez-Lara, J, López-Cortes, JG, Penieres-Carrillo, G, Gutierrez-Perez, R, Escudero-Salas, A, Alvarez-Toledano, C   +5 more
core  

Broadly Accessible and Highly Active Hydrophosphination Catalysis With Simple Calcium Compounds in DMSO Solution

ChemSusChem, Volume 19, Issue 19, 14 October 2026.
Simple calcium bis(amido) compounds are exceptionally potent hydrophosphination catalysts in DMSO solution. At ambient temperature or under irradiation, this catalyst successfully engages all manner of unsaturated substrates with primary and secondary phosphines with more than 100 examples of high conversion.
Moniruzzaman Moniruzzaman, Rory Waterman
wiley   +1 more source

ANTILEISHMANIAL EPIDIOXYSTEROLS FROM THE COLOMBIAN MARINE SPONGE Ircinia campana ARE OXIDATION PRODUCTS FROM NATURALLY OCCURRING Δ5,7 STEROLS

Vitae, 2007
Marine sponges of the genus Ircinia are known to contain several classes of metabolites, some of them with interesting biological activities as furanesesterterpenes, polyprenylated hydroquinones, macrolides, sulfur containing terpenoids, and steroids ...
Diana M. MÁRQUEZ F., Alejandro MARTÍNEZ M.   +1 more
doaj  

Wearable Electro‐Thermal Haptic Stimulator Driven by a Self‐Powered Tactile Sensor for Realistic Stimulus Replication

Advanced Science, Volume 13, Issue 56, 9 October 2026.
We present a stimulus‐replicating system combining a tactile sensor with a wearable Peltier thermotactile module and concentric electrotactile electrode. Signals encoding pressure and temperature drive the stimulators to reproduce mechano‐thermal cues on the skin. AlN/PDMS encapsulation and SA/LA PSA ensure mechanical compliance and thermal efficiency.
Ey‐In Lee, Chae‐Young Kang, Kyuhyun Hwang, Jongbaeg Kim, Jin‐Woo Park   +4 more
wiley   +1 more source

Linking triphenylphosphonium cation to a bicyclic hydroquinone improves their antiplatelet effect via the regulation of mitochondrial function

Redox Biology
Platelets are the critical target for preventing and treating pathological thrombus formation. However, despite current antiplatelet therapy, cardiovascular mortality remains high, and cardiovascular events continue in prescribed patients. In this study,
Diego Méndez, Francisca Tellería, Matías Monroy-Cárdenas, Héctor Montecino-Garrido, Santiago Mansilla, Laura Castro, Andrés Trostchansky, Felipe Muñoz-Córdova, Volker Zickermann, Jonathan Schiller, Sergio Alfaro, Julio Caballero, Ramiro Araya-Maturana, Eduardo Fuentes   +13 more
doaj   +1 more source

Research Progress on Solar Energy Storage and Conversion Technologies for Sustainable Development: Prospects, Challenges, and Future Outlooks

Advanced Energy and Sustainability Research, Volume 7, Issue 10, October 2026.
This review focuses on the potential of solar energy and major solar energy storage technologies and provides a comparative assessment of their thermodynamic performance, storage density, efficiency, operating conditions, technological maturity, and application suitability.
Md. Golam Kibria, S. R. Shajid, Md. Shahriar Mohtasim, Md. Sanowar Hossain, Barun K. Das, Md Shamim Ahamed, Monjur Mourshed   +6 more
wiley   +1 more source