Results 21 to 30 of about 22,841 (254)

Organic–inorganic hybrid mixed-halide ZnII and CdII tetrahalometallates with the 2-methylimidazo[1,5-a]pyridinium cation

Acta Crystallographica Section E: Crystallographic Communications, 2022
Three isomorphous 0-D hybrid salts, namely, 2-methylimidazo[1,5-a]pyridinium trichloridoiodidozincate(II), (C8H9N2)2[ZnCl3.19I0.81] or [L]2[ZnCl3.19I0.81], (I), 2-methylimidazo[1,5-a]pyridinium dibromidodichloridocadmate(II), (C8H9N2)2[CdBr2.42Cl1.58] or
Olga Yu. Vassilyeva, Elena A. Buvaylo, Vladimir N. Kokozay, Brian W. Skelton   +3 more
doaj   +1 more source

Reaction of Pyridinium Salts with Active Methylene Compounds

YAKUGAKU ZASSHI, 2006
The carbon-carbon bond-forming reactions of 1-methyl-2-methylthiophenylpyridinium iodides with active methylene compounds (such as dimethyl malonate, malononitrile) using NaH as a base gave the 2-substituted methylene-1,2-dihydropyridine derivatives.
Reiko, Fujita, Masato, Hoshino, Yasuhiro, Nishiuchi, Hiroshi, Tomisawa   +3 more
openaire   +3 more sources

A Synthesis of Thiopyran Pyridinium Perchlorate Compounds

Journal of Al-Nahrain University Science, 2013
Asynthesis of four pyridinium perchlorate compounds have been prepared from reaction one mole pyrylium salt (product already) with one mole cysteine in room temp. and diagnosed spectrally (FT-IR., 1H-NMR) in addition to the accurate quantitative elemental analysis.Asynthesis of sixteen Thiopyranpyridinium perchlorate compounds from reaction one mole ...
Marwan F. All-Heety, Sameaa J. Al-Bayati, Mohammed A. Kadhim, Rasha A. Jesama   +3 more
openaire   +1 more source

Novel amphiphilic pyridinium ionic liquids-supported Schiff bases: ultrasound assisted synthesis, molecular docking and anticancer evaluation

Chemistry Central Journal, 2018
Background Pyridinium Schiff bases and ionic liquids have attracted increasing interest in medicinal chemistry. Results A library of 32 cationic fluorinated pyridinium hydrazone-based amphiphiles tethering fluorinated counteranions was synthesized by ...
Fawzia Faleh Al-Blewi, Nadjet Rezki, Salsabeel Abdullah Al-Sodies, Sanaa K. Bardaweel, Dima A. Sabbah, Mouslim Messali, Mohamed Reda Aouad   +6 more
doaj   +1 more source

Design and synthesis of novel bis-pyridinium based-ionic liquids as potent antiparasitic agents

Heliyon, 2023
Focused bis-pyridinium based-ionic liquids were successfully synthesized through the quaternization of the selected 1,2-di(pyridin-4-yl)ethane followed by metathetical anion exchange.
Esraa Abdelhamid Moneer, Basant A. Bakr, Sara H. Akl, Yahya H. Shahin, Bassma H. Elwakil, Mohamed Hagar, Keshav Raj Paudel, Ateyatallah Aljuhani, Mohamed Reda Aouad, Nadjet Rezki   +9 more
doaj   +1 more source

Antimicrobial activities of pyridinium-tailored pyrazoles bearing 1,3,4-oxadiazole scaffolds

Journal of Saudi Chemical Society, 2017
Herein, a series of pyridinium-tailored 5-trifluoromethylpyrazoles containing 1,3,4-oxadiazole moieties were constructed through coupling key pharmaceutical fragments of pyridinium, pyrazole, and 1,3,4-oxadiazole scaffolds in single molecular ...
Lei Zhou, Pei-Yi Wang, Jian Zhou, Wu-Bin Shao, He-Shu Fang, Zhi-Bing Wu, Song Yang   +6 more
doaj   +1 more source

A method for the nucleophilic fluorination of 4-dimethylaminopyridine (DMAP) pyridinium salts

Results in Chemistry, 2023
Fluorinated organic compounds have proven to be beneficial in various industries. Recent research has utilized quaternary ammonium salts as precursors for fluorinations using the radioactive isotope 18F.
Derek Cressy, Murthy Akula, Aaron Frederick, Kaylin Shipley, Dustin Osborne   +4 more
doaj   +1 more source

Novel pyridinium surfactants for efficient, nontoxic in vitro gene delivery [PDF]

, 1997
Novel, double-chained pyridinium compounds have been developed that display highly efficient DNA transfection properties. The transfection efficiency of several of these compounds is enhanced by an order of magnitude, when compared with the transfection ...
Engberts, J B, Meekel, A A, ter Beest, M B, Hoekstra, D, Wagenaar, A, van der Woude, I, Ruiters, M H   +6 more
core   +1 more source

Antitumour Effects of Selected Pyridinium Salts on Sensitive Leukaemia HL60 Cells and Their Multidrug Resistant Topoisomerase II-Defective HL60/MX2 Counterparts

Molecules, 2022
Multidrug resistance (MDR), having a multifactorial nature, is one of the major clinical problems causing the failure of anticancer therapy. The aim of this study was to examine the antitumour effects of selected pyridinium salts, 1-methyl-3 ...
Jolanta Tarasiuk, Dorota Kostrzewa-Nowak, Wojciech Żwierełło   +2 more
doaj   +1 more source

4-[3-(Isonicotino-yloxy)propoxycarbon-yl]pyridinium diiodidoargentate(I)

, 2011
The structure of the title compound, (C15H15N2O4)[AgI2], consists of an organic 4-[3-(isonicotino­yloxy)propoxycarbon­yl]pyridinium cation which has a gauche–gauche (O/C/C/C—O/C/C/C or GG’) conformation and lies on a twofold rotation axis, which passes ...
Bolte, Michael, Iván Brito, López-Rodríguez, Matías, Brito, Iván, Alejandro Cárdenas, Michael Bolte, Vallejos, Javier, Cárdenas, Alejandro, Matías López-Rodríguez, Alejandro Cárdenas, Iván Brito, Javier Vallejos, Matías López-Rodríguez   +12 more
core   +1 more source