Results 61 to 70 of about 30,087 (242)

The Challenging P‐Alkylation of Aromatic Phosphorus Heterocycles and Follow‐Up Reactions

ChemistryEurope, EarlyView.
P‐alkylation of λ3σ2‐phosphinines is hindered by weak nucleophilicity and scarce synthetic access, previously requiring multistep routes or extreme electrophiles. A direct ambient‐condition method is reported using 3,5‐bis(trimethylsilyl)‐phosphinine/B(C6F5)3 with esters or iso(thio)cyanates to generate stable 1‐R‐phosphininium salts.
Samantha Frank, Ádám Horváth, Duy Nguyen, Moritz J. Ernst, Simon Steinhauer, Zoltán Benkő, Christian Müller   +6 more
wiley   +1 more source

2-[(E)-2-(4-Methoxyphenyl)ethenyl]-1-methylpyridinium iodide

Acta Crystallographica Section E, 2013
In the title molecular salt, C16H10NO+·I−, the dihedral angle between the pyridinium and benzene rings is 6.61 (8)°. In the crystal, the cation is linked to the anion by a C—H...I interaction arising from the activated ...
Jiban Podder, V. Ramkumar, A. RubanKumar, S. Kalainathan, K. Senthil   +4 more
doaj   +1 more source

Imidazole aldoximes effective in assisting butyrylcholinesterase catalysis of organophosphate detoxification. [PDF]

, 2014
Intoxication by organophosphate (OP) nerve agents and pesticides should be addressed by efficient, quickly deployable countermeasures such as antidotes reactivating acetylcholinesterase or scavenging the parent OP.
Amitai, Gabriel, Fokin, Valery V, Radić, Zoran, Sharpless, K Barry, Sit, Rakesh K, Taylor, Palmer   +5 more
core  

Skeletal Editing from Pyridine to Aniline via C‐Insertion and N‐Isomerization

ChemistryEurope, EarlyView.
A concise protocol is presented that converts pyridines into anilines by externalizing the original pyridine nitrogen at either the "ipso" or "ortho" position, which results in para or meta‐primary aniline products. A key carbene‐insertion step precedes nitrogen migration, preserving both ring size and overall structure.
Yun Luo, Jing Dai, Yongchang Wei, Chang Min   +3 more
wiley   +1 more source

One-Pot Phosphate-Mediated Synthesis of Novel 1,3,5-Trisubstituted Pyridinium Salts: A New Family of S. aureus Inhibitors [PDF]

, 2017
Polysubstituted pyridinium salts are valuable pharmacophores found in many biologically active molecules. Their synthesis typically involves the use of multistep procedures or harsh reaction conditions.
Edwards, M, Gershater, MC, Hailes, HC, Pesnot, T, Ward, JM   +4 more
core   +1 more source

Shedding Light on Synthetic Autocatalysis: From Conventional Closed‐Shell Chemistries to Overlooked Open‐Shell Occurrences

Chemistry – A European Journal, EarlyView.
Why add another catalyst when the product itself holds the power to catalyze its own formation? Autocatalysis in synthetic chemistry enhances reaction efficiency and uncovers novel catalytic behavior across both closed‐shell and open‐shell systems, expanding reactivity and enabling innovative design strategies.
Jaspreet Kaur, Joshua P. Barham
wiley   +1 more source

Crystal structure of 2-(azaniumylmethyl)pyridinium bis(hydrogen squarate)

Acta Crystallographica Section E: Crystallographic Communications, 2017
The asymmetric unit of the title compound, C6H10N22+·2C4HO4−, comprises two hydrogen squarate (Hsq−; systematic name: 2-hydroxy-3,4-dioxocyclobutanolate) anions and a 2-(azaniumylmethyl)pyridinium dication.
Nina Salamzadeh, Zeynep Demircioglu, Ufuk Korkmaz, Orhan Büyükgüngör   +3 more
doaj   +1 more source

Diquat Derivatives: Highly Active, Two-Dimensional Nonlinear Optical Chromophores with Potential Redox Switchability [PDF]

, 2010
In this article, we present a detailed study of structure−activity relationships in diquaternized 2,2′-bipyridyl (diquat) derivatives. Sixteen new chromophores have been synthesized, with variations in the amino electron donor substituents, π-conjugated ...
Abbotto A., Akdas-Kilig H., Alain V., Averseng F., Benjamin J. Coe, Bosshard Ch., Boubekeur-Lecaque L., Bruce S. Brunschwig, Brunschwig B. S., Bublitz G. U., Campo J., Cariati E., Champagne B., Cho B. R., Cifuentes M. P., Clays K., Clays K., Clays K., Clays K., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Cui Y.-Z., Dhenaut C., Di Bella S., Di Bella S., Di Bella S., Ferguson, B., Figi H., Franz E., Geis W., Gillaizeau-Gauthier I., Heesink G. J. T., Hendrickx E., Hennrich G., Hilton A., Inge Asselberghs, Isborn C. M., James A. Harris, Jang S.-R., Javier Garín, Jeong M.-Y., Jesús Orduna, John Fielden, Kaino T., Kawase K., Kawase K., Kim H. M., Kim H. S., Kim H. S., Knoch F., Koen Clays, Kuzuya M., Kuzyk M. G., Kuzyk M. G., Kwon O., Lacroix P. G., Le Bouder T., Le Floc’h V., Lee O.-K., Li H.-P., Li H.-P., Lindner E., Liu C.-G., Liu Y., Madeleine Helliwell, Malaun M., Marder S. R., Marder S. R., Marder S. R., Marder S. R., Maury O., Maury O., McDonagh A. M., McEntee J., Meshulam G., Miles R. E., Mohan Kumar R., Mori Y., Moylan C. R., Muhammad S., Nalwa H. S., Nunzi F., Olbrechts G., Olbrechts G., Ostroverkhov V., Oudar J. L., Oudar J. L., Papadopoulos M. G., Powell C. E., Rigamonti L., Ruiz B., Ruiz B., Schneider A., Schneider A., Simon P. Foxon, Sohma S., Sporer C., Tai O. Y.-H., Taniuchi T., Taniuchi T., Vance F. W., Vance F. W., Verbiest T., Weyland T., Willetts A., Wolff J. J., Wolff J. J., Woodford J. N., Wortmann R., Wortmann R., Xu X.-L., Yang M.-L., Yang Z., Yang Z., Yang Z., Yitzchaik S., Zhou Y.-F., Zrig S., Zyss J., Zyss J.   +131 more
core   +2 more sources

Pyridinium Salts Influence on Lipid Bilayers [PDF]

Biophysical 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, Di Vitta, Claudio, Marzorati, Liliana   +2 more
openaire   +2 more sources

Membrane Engineering for Battery Systems: Bridging Design Principles and Frontier Applications

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The review emphasizes membrane separators' role in battery performance and safety, covering redox flow, lithium‐ion, and solid‐state batteries. It reviews advances in membrane materials (e.g., polymer electrolytes, hybrid composites) and ion transport mechanisms, while addressing challenges like dendrite growth and crossover losses.
Xiaoqun Zhou, Justice Delali Akoto, Rui Tan, Jun Ma   +3 more
wiley   +1 more source