Results 111 to 120 of about 3,124,995 (289)

Novel Synthesis of Substituted 2-Trifluoromethyl and 2-Perfluoroalkyl N-Arylpyridinium Compounds—Mechanistic Insights

Molecules, 2019
We report a new one-pot synthesis of 2-trifluoromethylated/2-perfluoroalkylated N-aryl-substituted pyridiniums, 5,6,7,8-tetrahydroquinoliniums and 6,7,8,9-tetrahydro-5H-cyclohepta[b]-pyridinium compounds starting from an activated β-dicarbonyl ...
Salem El Kharrat, Philippe Laurent, Laurent Boiteau, Hubert Blancou   +3 more
doaj   +1 more source

New approaches to the synthesis of pyridinium N-heteroarylaminides [PDF]

, 2008
Different substituted pyridinium N-heteroarylaminides have been prepared in one step from N-aminopyridinium iodide and the corresponding heteroaryl halide by two alternative routes.
Córdoba López, Marta, Izquierdo Ceinos, Ma Luisa, Álvarez-Builla Gómez, Julio   +2 more
core   +2 more sources

Efficient One‐Pot Synthesis of Benzothiazole Compounds From Vinamidinium Salts

ChemistryOpen, EarlyView.
A catalyst‐free one‐pot reaction of vinamidinium salts with benzothiazole hydrazines efficiently produces 1,3‐bis((3‐methylbenzo[d]thiazol‐2(3H)‐ylidene)hydrazineylidene)propan‐2‐ol (BBTA) and 1‐((1Z,3E)‐1‐(dimethylamino)‐3‐(((Z)‐3‐methylbenzo[d]thiazol‐2(3H)‐ylidene)hydrazineylidene)prop‐1‐en‐2‐yl)pyridin‐1‐ium (DMBT) derivatives.This simple method ...
Zeinab khosravi, Abdolmohammad Mehranpour, Mohammad Reza Mohammadizadeh, Genta Kojya, Satoru Arimitsuc   +4 more
wiley   +1 more source

Plasmonic Hot‐Carrier Redox Enables Proton‐Coupled Electron Transfer at C─H Bonds

Angewandte Chemie, Volume 138, Issue 6, 2 February 2026.
Plasmonic hot carriers provide unprecedented control over coupled electron–proton transfer, enabling visible‐light activation of strong C─H bonds. Using an energy‐filter electrode, we reveal a stepwise electron‐then‐proton pathway and directly tune the underlying driving forces.
Daniel Velev Latchev, Arthur Andreis, Julian Michael Heeg, Jacinto Sá   +3 more
wiley   +2 more sources

Mn-mediated sequential three-component domino Knoevenagel/cyclization/Michael addition/oxidative cyclization reaction towards annulated imidazo[1,2-a]pyridines

Beilstein Journal of Organic Chemistry, 2018
The sequential three-component reaction between o-hydroxybenzaldehydes, N-(cyanomethyl)pyridinium salts and a nucleophile towards substituted chromenoimidazopyridines under oxidative conditions has been developed. The employment of Mn(OAc)3·2H2O or KMnO4
Olga A. Storozhenko, Alexey A. Festa, Delphine R. Bella Ndoutoume, Alexander V. Aksenov, Alexey V. Varlamov, Leonid G. Voskressensky   +5 more
doaj   +1 more source

Water Co‐Adsorption in Ultrathin Films of Ionic Liquids on Pt(111)

ChemistryOpen, EarlyView.
At 100 K, IL adsorption on D2O precovered Pt(111) partially displaces interfacial water resulting in a water‐IL co‐adsorbed layer. Upon heating to 130 K, IL ions migrate to the metal interface, thereby destabilizing adsorbed water as shown by the ≈10 K reduction in its desorption temperature.
Timo Talwar, Hans‐Peter Steinrück, Florian Maier   +2 more
wiley   +1 more source

Synthesis, Biological Evaluation, and Docking Studies of Novel Bisquaternary Aldoxime Reactivators on Acetylcholinesterase and Butyrylcholinesterase Inhibited by Paraoxon

Molecules, 2018
Nerve agents and oxon forms of organophosphorus pesticides act as strong irreversible inhibitors of two cholinesterases in the human body: acetylcholinesterase (AChE; EC 3.1.1.7) and butyrylcholinesterase (BChE; EC 3.1.1.8), and are therefore highly ...
Kamil Kuca, Daniel Jun, Lucie Junova, Kamil Musilek, Martina Hrabinova, Jorge Alberto Valle da Silva, Teodorico Castro Ramalho, Marian Valko, Qinghua Wu, Eugenie Nepovimova, Tanos Celmar Costa França   +10 more
doaj   +1 more source

Dental composites: a comprehensive review on formulation, properties and recent developments

Polymer International, EarlyView.
Dental composites are essential in modern restorative dentistry; this review covers their development, composition, key properties and recent advances, highlighting new technologies for optimizing materials and improving clinical outcomes. Abstract Dental composites have evolved considerably since their introduction, becoming the cornerstone of modern ...
Rayenne Latoui, Djallel Bouzid, Olivier Boyron   +2 more
wiley   +1 more source

Colorimetric and Photothermal Hollow Nanocomposite Based on Silver‐Seeded Prussian Blue Analog for Dopamine Monitoring and Photothermal Sterilization

Rare Metals, EarlyView.
ABSTRACT Multi‐element Prussian blue analog (PBA) nanocomposites have attracted wide attention for their superior characteristics to single‐functional nanomaterials in extensive applications of diagnosis and therapy. In this study, a novel hollow nanocomposite was designed and fabricated by embedding S2− and Ag nanoparticles into a NiCuMnFe (PBA).
Tao Ji, Ze Xu, Ying Wang, Xingchen Lu, Yuqian Zhu, Qingli Huang, Quanshuang Li, Shibao Li   +7 more
wiley   +1 more source

Substrate‐Tight Graphene Transmembrane‐nanofluidic Devices

Small, EarlyView.
This study demonstrates that the covalent coupling of a pyrene layer to a silicon nitride substrate using silane and peptide chemistry increases the adhesion of graphene to the substrate and prevents the delamination of graphene. 76.2% of the devices with free‐standing graphene are successful devices for ion transport measurement in 0.1 M HCl ...
Xiaofang Kang, Buhang Chen, Erik P. van Geest, Wangyang Fu, Jianwei Gao, Luzhao Sun, Zhongfan Liu, Grégory F. Schneider   +7 more
wiley   +1 more source