Results 61 to 70 of about 23,873 (241)

Synthesis and structure of new N-alkoxy-N-(1-pyridinium)urea chlorides [PDF]

, 2016
New N-[1-(4-amino)pyridinium]-N-methoxyurea chloride, N-[1-(2-amino)pyridinium]-N-methoxyurea chloride and their analogs were synthesized by N-alkoxy-N-chloroureas reaction with the proper pyridines in acetonitrile or ether solution by improved procedure.
Anishchenko, A. A., Klots, E. A., Mazepa, A. V., Shishkina, S. V., Shtamburg, V. G., Shtamburg, V. V., Tsygankov, A. V., Zubatyuk, R. I.   +7 more
core  

Development of a novel, multifunctional, membrane-interactive pyridinium salt with potent anticancer activity [PDF]

The synthesis and biological evaluation of a novel pyridinium salt is reported. Initial membrane interaction with isolated phospholipid monolayers was obtained with the pyridinium salt, and two neutral analogues for comparison, and the anticancer effects
Dennison, Sarah Rachel, Fahs, Sara, Patil-Sen, Yogita, Rowther, Farjana, Snape, Timothy James, Warr, Tracy   +5 more
core   +1 more source

Human Leukocyte Elastase Triggered Nanoparticles for Targeted Antimicrobial Delivery and Oral Microbial Modulation

Advanced NanoBiomed Research, EarlyView.
This study explores enzyme‐responsive nanoparticles for targeted antimicrobial release in inflamed oral environments. Nanoparticles formed by complexing peptides and chlorhexidine respond to human leukocyte elastase and release chlorhexidine selectively. P7 (ECAAPVCE)‐based formulations show optimal properties and stability, with antimicrobial activity
Mohammed A. Hadis, Ignacio Insua, Farah N. S. Raja, Álvaro Vila, William M. Palin, Michael R. Milward, Paul R. Cooper, Sarah A. Kuehne, Owen Addison, Paco Fernandez‐Trillo   +9 more
wiley   +1 more source

Chiral Indolizinium Salts Derived from 2-Pyridinecarbaldehyde—First Diastereoselective Syntheses of (−)-1-epi-lentiginosine

Molecules, 2023
The first diastereoselective synthesis of (−)-1-epi-lentiginosine from a common chiral trans-epoxyamide derived from 2-pyridincarbaldehyde is reported. This methodology involves a sequential oxirane ring opening and intramolecular 5-exo-tet cyclization ...
Hisami Rodriguez-Matsui, David M. Aparicio, María L. Orea, Jorge R. Juárez, Victor Gómez-Calvario, Dino Gnecco, Alan Carrasco-Carballo, Joel L. Terán   +7 more
doaj   +1 more source

Syntheses and Properties of Two-Dimensional, Dicationic Nonlinear Optical Chromophores Based on Pyrazinyl Cores [PDF]

, 2010
Six new dicationic 2D nonlinear optical (NLO) chromophores with pyrazinyl-pyridinium electron acceptors have been synthesized by nucleophilic substitutions of 2,6-dichloropyrazine with pyridyl derivatives. These compounds have been characterized as their
Asselberghs, Inge, Brunschwig, Bruce S., Clays, Koen, Coe, Benjamin J., De Mey, Kurt, Fielden, John, Foxon, Simon P., Helliwell, Madeleine   +7 more
core   +2 more sources

Liquid-Liquid Equilibrium Data for the Ionic Liquid N-Ethyl-Pyridinium Bromide with Several Sodium Salts and Potassium Salts

Journal of Chemistry, 2013
The liquid-liquid equilibrium (LLE) data for systems containing N-ethyl-pyridinium bromide ([EPy]Br), salt (Na2HPO4, K2HPO4, K2SO4, C4O6H4KNa), and water have been measured experimentally at T=298.15 K and the formations of these four aqueous two-phase ...
Yuliang Li, Xiaojia Lu, Jing Hao, Changquan Chen   +3 more
doaj   +1 more source

Asymmetric α‐Alkylation With Activated and Unactivated Electrophiles by a Highly Productive and Recyclable Lewis Acid/Imidazolium Catalyst

Angewandte Chemie International Edition, EarlyView.
An air‐stable, easily prepared, bifunctional Cu(II)/imidazolium complex enables highly enantioselective α‐alkylation of 1,3‐dicarbonyls with outstanding productivity (TON up to 1740). Highlights include broad electrophile scope spanning π‐activated and nonactivated reagents, stereo‐retentive allylation, simple catalyst synthesis, and efficient catalyst
Johanna Haußmann, Alexander Beck, Dominik Hornung, Michael Mistele, Alexander Allgaier, Wolfgang Frey, Joris van Slageren, Johannes Kästner, René Peters   +8 more
wiley   +1 more source

An In Vitro and In Silico Study of Antioxidant Properties of Curcuminoid N-alkylpyridinium Salts: Initial Assessment of Their Antitumoral Properties

Antioxidants, 2022
In this work, we report the synthesis of curcuminoids with ionic liquid characteristics, obtained by incorporating alkyl-substituted pyridinium moiety rather than one phenyl group through a two-step process.
Oscar Forero-Doria, Luis Guzmán, Felipe Jiménez-Aspee, Javier Echeverría, Sergio Wehinger, Claudio Valenzuela, Ramiro Araya-Maturana, Maximiliano Martínez-Cifuentes   +7 more
doaj   +1 more source

Syntheses and Properties of Salts of Chromophores with Ferrocenyl Electron Donor Groups and Quaternary Nitrogen Acceptors [PDF]

, 2009
A series of five new dipolar cations has been synthesized with ferrocenyl (Fc) electron donor groups connected to N-arylpyridinium, N-methylquinolinium, N-methylbenzothiazolium, or N-methylacridinium acceptors.
Brunschwig, Bruce S., Clays, Koen, Coe, Benjamin J., Docherty, Rebecca J., Foxon, Simon P., Franz, Edith, Harper, Elizabeth C., Helliwell, Madeleine, Raftery, James   +8 more
core   +1 more source

Approaching the limit of CuII/CuImixed valency in a CuIBr2–N-methylquinoxalinium hybrid compound [PDF]

, 2015
A novel 1D hybrid salt (MQ)[CuBr2]∞ (MQ = N-methylquinoxalinium) is reported. Structural, spectroscopic and magnetic investigations reveal a minimal CuII doping of less than 0.1%. However it is not possible to distinguish CuI and CuII.
Auban-Senzier, Pascale, Leblanc, Nicolas, Pasquier, Claude, Powell, Annie K., Raffy, Helene, Sproules, Stephen   +5 more
core   +1 more source