Results 91 to 100 of about 358,569 (255)

Electrocyclic Ring‐Opening of 1,2,4‐Oxadiazole[4,5‐a]piridinium Chloride: a New Route to 1,2,4‐Oxadiazole Dienamino Compounds

open access: yesChemistryOpen, 2019
1,2,4‐Oxadiazole[4,5‐a]piridinium chloride adds nucleophiles to undergo electrocyclic ring opening affording 1,2,4‐oxadiazole dienamino derivatives. These pyridinium salts represent a special class of Zincke salts that are prone to rearrange when treated
Dr. Stefano Carella   +2 more
doaj   +1 more source

Pyridinium Salts Influence on Lipid Bilayers [PDF]

open access: yesBiophysical Journal, 2014
In this study, we continue the investigation of different functional groups of molecules having a side long alkyl chain (C14 or C16) [Langmuir; 2011, 27(13), 8257 and J. Lipids, 2013, Article ID 592318]. Thioquinones and similar naphtothioquinones showed strong influence on the structural behavior of POPC and POPE model membranes bilayers. Such effects
Funari, Sergio de Souza   +2 more
openaire   +2 more sources

Multifunctional Design of Solid Polymer Electrolytes: Paving the Way for High‐Performance All‐Solid‐State Batteries

open access: yesCarbon Energy, EarlyView.
This review provides a comprehensive and systematic overview of the multifunctional design strategies for solid polymer electrolytes (SPEs), a pivotal component for enabling high‐performance all‐solid‐state batteries (ASSBs). It begins with a detailed classification of SPE systems and elaborates on their respective molecular design principles. The work
Bin Man   +11 more
wiley   +1 more source

Crystal structures of 4-(pyrimidin-2-yl)piperazin-1-ium chloride and 4-(pyrimidin-2-yl)piperazin-1-ium nitrate

open access: yesActa Crystallographica Section E, 2014
The title salts, C8H13N4+·Cl−, (I), and C8H13N4+·NO3−, (II), contain linked pyridinium–piperazine heterocycles. In both salts, the piperazine ring adopts a chair conformation with protonation at the N atom not linked to the other ring. In the crystal of (
Thammarse S. Yamuna   +4 more
doaj   +1 more source

Reaction of Pyridinium Salts with Active Methylene Compounds

open access: yesYAKUGAKU 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   +3 more
openaire   +3 more sources

Pyridines and pyridinium salts from cyanoacetamides

open access: yes, 1976
Self-condensation of cyanoacetamides under the influence of phosphorus oxychloride leads to pyridines and pyridinium salts in high yield. The mechanism of the reaction is discussed and evidence for the structure of the products is described. The chemical
AL Cossey   +3 more
core   +1 more source

Deoxydehydration of vicinal diols and polyols catalyzed by pyridinium perrhenate salts [PDF]

open access: yes, 2017
Simple ammonium and pyridinium perrhenate salts were evaluated as catalysts for the deoxydehydration (DODH) of diols into alkenes.
Cokoja, M   +21 more
core   +1 more source

Porous Carbon Materials for Carbon Dioxide Capture

open access: yesCarbon Energy, EarlyView.
This work aims to address the current status and challenges associated with the regulation of pore structures, as well as the influence of pore structures on CO2 capture. Systematic quantitative analysis of structure–property relationships, combined with machine learning approaches, can effectively evaluate the contributions of structural ...
Zhifu Liu   +6 more
wiley   +1 more source

Deracemization of Axially Chiral Nicotinamides by Dynamic Salt Formation with Enantiopure Dibenzoyltartaric Acid (DBTA)

open access: yesMolecules, 2013
Dynamic atroposelective resolution of chiral salts derived from oily racemic nicotinamides and enantiopure dibenzoyltartaric acid (DBTA) was achieved by crystallization.
Fumitoshi Yagishita   +6 more
doaj   +1 more source

Microwave-promoted synthesis of chiral pyridinium salts.

open access: yes, 2005
The synthesis of several chiral pyridinium salts via Zincke_s reaction can be easily accomplished by domestic microwave oven irradiation. Yield enhancements, reduction of reaction time, and less racemization were observed under microwave heating when ...
Viana, Gustavo Henrique Ribeiro   +5 more
core   +1 more source

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