Results 111 to 120 of about 30,087 (242)

Crystal structure of 2-{[2-(3-phenylallylidene)hydrazin-1-yl]thiocarbonylsulfanylmethyl}pyridinium chloride

Acta Crystallographica Section E, 2014
In the title salt of an S-substituted dithiocarbazate, C16H16N3S2+·Cl−, the dihedral angles between the almost planar (r.m.s deviation = 0.005 Å) central CN2S2 residue and the terminal pyridinium and phenyl rings are 80.09 (11) and 3.82 (11 ...
May Lee Low, Thahira Begum S. A. Ravoof, Mohamed Ibrahim Mohamed Tahir, Karen A. Crouse, Edward R. T. Tiekink   +4 more
doaj   +1 more source

One-Flow, Multi-Step Synthesis of Nucleosides via Brønsted Acid- Catalyzed Glycosylation [PDF]

, 2010
Nucleosides in flow: A general, scalable method of Brønsted acid-catalyzed nucleoside formation is described. Because of the high reaction temperatures readily available to the flow reaction format, mild Brønsted acids, particularly pyridinium triflates,
Bedore, Matthew W., Jamison, Timothy F., Sniady, Adam   +2 more
core   +1 more source

High Potential Isoindoline‐Based Nitroxides Posolytes for Aqueous Organic Redox Flow Batteries

ChemSusChem, Volume 19, Issue 3, February 2026.
A convenient metal‐catalyzed [2 + 2 + 2] cycloaddition enables the synthesis of isoindoline‐based nitroxides as new posolytes for aqueous organic redox flow batteries. The cationic PPO exhibits a 220 mV higher oxidation potential than 4‐TMA‐TEMPO, 3 M solubility in 1 M NaCl, and a cell voltage of 1.56 V.
Karim Boutamine, Gilles Casano, Patricia Bassil, Sébastien Gauden, Cecilia Poderi, Emilie Pepe, Frédéric Favier, Steven Le Vot, Olivier Ouari   +8 more
wiley   +1 more source

4-Aminopyridinium cis-2-carboxycyclohexane-1-carboxylate

Acta Crystallographica Section E, 2011
In the structure of the title molecular salt, C5H7N2+·C8H11O4−, the cis monoanions associate through short O—H...O hydrogen bonds in the carboxylic acid groups [graph set C(7)], forming zigzag chains which extend along the c ...
Urs D. Wermuth, Graham Smith
doaj   +1 more source

Poly(Pyridinium Salt)s Containing 2,7-Diamino-9,9'-Dioctylfluorene Moieties with Various Organic Counterions Exhibiting Both Lyotropic Liquid-Crystalline and Light-Emitting Properties. [PDF]

Molecules, 2021
Bhowmik PK, Jo TS, Koh JJ, Park J, Biswas B, Principe RCG, Han H, Wacha AF, Knaapila M.   +8 more
europepmc   +1 more source

Construction of 3,5-dinitrated 1,4-dihydropyridines modifiable at 1,4-positions by a reaction of β-formyl-β-nitroenamines with aldehydes [PDF]

, 2015
A novel and efficient method for the synthesis of 4-substituted 3,5-dinitro-1,4-dihydropyridines by a reaction of β-formyl-β-nitroenamines with aldehydes was developed.
1187, 1188, 1189, 1190, Asahara, Haruyasu, Hamada, Mai, Nakaike, Yumi, Nishiwaki, Nagatoshi   +7 more
core   +2 more sources

The synthesis of 2-amino-3-carboxamideindolizines with using pyridinium salt and C-nucleophiles–derivatives acetonitrile

Results in Chemistry
This study reports the synthesis of a pyridinium salt achieved by heating 2-chloropyridine with 2-bromoacetamide in the absence of solvent. The synthesized salt exhibits a high reactivity towards nucleophilic substitution reactions with C-nucleophiles ...
Oleksii Y. Kashner, Kyryl O. Bocharov, Gennadii E. Khoroshilov   +2 more
doaj   +1 more source

Crystal structure of the co-crystal salt 2-amino-6-bromopyridinium 2,3,5,6-tetrafluorobenzoate

Acta Crystallographica Section E: Crystallographic Communications, 2019
The asymmetric unit of the co-crystal salt 2-amino-6-bromopyridinium 2,3,5,6-tetrafluorobenzoate, C5H6BrN2+·C7HF4O2−, contains one pyridinium cation and one benzoate anion. In the crystal, the aminopyridinium cationic unit forms two hydrogen bonds to the
Eric Bosch
doaj   +1 more source

Pyridinium N-(2'-azinyl)aminides: Regioselective synthesis of 2-alkylaminoazines [PDF]

, 2000
The regioselective alkylation of pyridinium-N-(2'-azinil)aminides with alkyl halides under mild conditions is described. The alkylation, combined with a reduction of the N-N bond, allows an easy preparation of 2-alkylaminoazines.The authors wish to thank
Burgos Gómez, Carolina, Delgado Jiménez, Francisca, García Navío, José Luis, Izquierdo Ceinos, Ma Luisa, MartÍnez Barrasa, Valentín, Álvarez-Builla Gómez, Julio   +5 more
core   +3 more sources

On‐Resin Pictet–Spengler Cyclization for 1,2,3,4‐Tetrahydro‐β‐carboline‐3‐carboxylate (Tcc) Peptide Synthesis With Acid‐Labile Functional Tolerance

Journal of Peptide Science, Volume 32, Issue 2, February 2026.
The constrained tryptophan (Trp) analog 1,2,3,4‐tetrahydro‐β‐carboline‐3‐carboxylic acid (Tcc) is used to restrict peptide conformation in structure–activity relationship studies. Although Pictet–Spengler cyclization of Trp and aldehydes with mineral acid gives Tcc analogs, such harsh conditions do not tolerate acid‐labile functionality.
Omer S. L. N'dri, Charity D. Yongo‐Luwawa, Xiaozheng Wei, Kajumee Bora Bhowal, Chitra P. Sadanandhan, Darince Truong, Ida Boccino, Will Maclean, Lylia Dif‐Yaiche, Zoé Villeneuve, William D. Lubell   +10 more
wiley   +1 more source