Results 21 to 30 of about 23,873 (241)

Investigation of the Pyridinium Ylide—Alkyne Cycloaddition as a Fluorogenic Coupling Reaction

Molecules, 2016
The cycloaddition of pyridinium ylides with alkynes was investigated under mild conditions. A series of 13 pyridinium salts was prepared by alkylation of 4-substituted pyridines.
Simon Bonte, Ioana Otilia Ghinea, Rodica Dinica, Isabelle Baussanne, Martine Demeunynck   +4 more
doaj   +1 more source

Preparation of the Pyridinium Salts Differing in the Length of the N-Alkyl Substituent

Molecules, 2010
Quaternary pyridinium salts with chains ranging from C8 to C20 belong in the large group of cationic surfactants. In this paper, the preparation of such cationic surface active agents based on the pyridinium moiety and differing in the length of the N ...
Kamil Musilek, Jan Korabecny, Miroslav Pohanka, Ondrej Soukup, Jiri Cabal, Petr Stodulka, Jan Marek, Kamil Kuca   +7 more
doaj   +1 more source

Synthesis of Pyridinium Amphiphiles Used for Transfection and Some Characteristics of Amphiphile/DNA Complex Formation [PDF]

, 2000
Pyridinium amphiphiles have found practical use for the delivery of DNA into cells. Starting from 4-methylpyridine, a general synthesis has been devised for the production of pyridinium amphiphiles which allows variation in both the hydrophobic part and ...
Bosgraaf, Bouke,, Brisson, Alain,, Engberts, Jan B.F.N.,, Haadsma, Peter,, Hoekstra, Dick,, Kroeze, Jessica E.,, Meekel, Arthur A.P.,, Ruiters, Marcel H.J.,, Stuart, Marc C.A.,, Wagenaar, Anno,, Šmisterová, Jarmila,   +10 more
core   +2 more sources

Computer-Assisted Design of Environmentally Friendly and Light-Stable Fluorescent Dyes for Textile Applications. [PDF]

, 2019
Five potentially environmentally friendly and light-stable hemicyanine dyes were designed based on integrated consideration of photo, environmental, and computational chemistry as well as textile applications.
Chen, Guoqiang, Sun, Gang, Tang, Songsong   +2 more
core   +1 more source

4,4′,4″-(Benzene-1,3,5-triyltris(ethyne-2,1-diyl))tris(1-methylpyridin-1-ium) Iodide

Molbank, 2023
Despite having been known for a long time, quaternary 4,4′-bipyridinium salts, or viologens, are still a highly inspiring class of compounds, thanks to their peculiar redox and charge transfer properties.
Lorenza Romagnoli, Andrea D’Annibale, Alessandro Latini   +2 more
doaj   +1 more source

Identification of a 3-Alkylpyridinium Compound from the Red Sea Sponge Amphimedon chloros with In Vitro Inhibitory Activity against the West Nile Virus NS3 Protease. [PDF]

, 2018
Viruses are underrepresented as targets in pharmacological screening efforts, given the difficulties of devising suitable cell-based and biochemical assays.
Duggan, Brendan M, Emwas, Abdul-Hamid, Gerwick, William H, Kharbatia, Najeh, Kremb, Stephan, O'Rourke, Aubrie, Raji, Misjudeen, Sioud, Salim, Voolstra, Christian R   +8 more
core   +3 more sources

Catalytic response and molecular simulation studies in the development of synthetic routes in trimeric triaryl pyridinium type ionic liquids

Scientific Reports, 2023
Under conventional and silica-supported Muffle furnace methods, water-soluble substituted trimeric triaryl pyridinium cations with various inorganic counter anions are synthesized.
Ramalingam Tamilarasan, Annadurai Subramani, G. Sasikumar, Pandurangan Ganapathi, S. Karthikeyan, Sasikumar Ponnusamy, Salim Albukhaty, Mustafa K. A. Mohammed, Zaidon T. Al-aqbi, Faris A. J. Al-Doghachi, Duha S. Ahmed, Yun Hin Taufiq-Yap   +11 more
doaj   +1 more source

A Dicationic Calix 4 Pyrrole Derivative and Its Use for the Selective Recognition and Displacement-Based Sensing of Pyrophosphate [PDF]

, 2012
A new bis-pyridinium calix[4] pyrrole derivative is reported. This system forms a non-fluorescent complex upon exposure to the chromenolate anion. The resulting supramolecular ensemble binds the pyrophosphate anion with high affinity (K-a (2.55 +/- 0.12)
Hwang, Hyonseok, Kim, Dong Sub, Lee, Cang-Hee, Sessler, Jonathan L., Sokkalingam, Punida   +4 more
core   +1 more source

Designed Azolopyridinium Salts Block Protective Antigen Pores In Vitro and Protect Cells from Anthrax Toxin [PDF]

, 2013
Background:Several intracellular acting bacterial protein toxins of the AB-type, which are known to enter cells by endocytosis, are shown to produce channels.
A Kronhardt, A Messmer, A Ménard, A Ménard, AA Verveen, AF Kintzer, AM Friedlander, Anika Bronnhuber, AW Artenstein, BA Krantz, C Andersen, C Bachmeyer, C Bachmeyer, C Petosa, Christoph Beitzinger, CT Bahner, D Blöcker, D Blöcker, DB Lacy, EM Nestorovich, EM Nestorovich, F Conti, F Orlik, F Orlik, F Tonello, F Tonello, F Wohnsland, G Hajós, G Timári, G Vitale, György Hajós, H Barth, H Barth, Holger Barth, I Zornetta, J Sun, J Wesche, JA Young, JC Milne, JL Elliott, K Cunningham, KA Bradley, Kerstin Duscha, L Abrami, L Abrami, L Abrami, L Abrami, L Song, Ludger Johannes, M Eigen, M Mock, Markus Huber-Lang, MJ Brown, NS Duesbery, PC Hanna, R Benz, R Benz, R Palkó, R Pellizzari, RJ Collier, RO Blaustein, RO Blaustein, Roland Benz, S Nekolla, SH Leppla, SM Bezrukov, SM Bezrukov, T Neumeyer, T Neumeyer, T Neumeyer, TC Dixon, V Escuyer, VA Karginov, VA Karginov, VA Karginov, Y Singh, Zsuzsanna Riedl   +76 more
core   +2 more sources

Regioselective Oxidation of 3-Substituted Pyridinium Salts

Molecules, 2000
(1'R)-(+)-3-Hydroxymethyl-1-(1'-phenyl-ethyl)-pyridinium chloride (1), 1-benzyl-3-[1', 3']-dioxolan-2'-yl-pyridinium chloride (2) and (2'S, 4'S, 5'R)-(-)-1-benzyl-3-(3',4'-dimethyl-5'-phenyl-oxazolidin-2'-yl)-pyridinium bromide (3), were transformed by ...
W. F. Reynolds, Manuel Soriano, Raúl G. Enríquez, Jorge R. Juárez, Alberto Galindo, Dino Gnecco, Joel L. Terán   +6 more
doaj   +1 more source