Results 111 to 120 of about 73,933 (268)

Asymmetric α‐Alkylation With Activated and Unactivated Electrophiles by a Highly Productive and Recyclable Lewis Acid/Imidazolium Catalyst

Angewandte Chemie International Edition, EarlyView.
An air‐stable, easily prepared, bifunctional Cu(II)/imidazolium complex enables highly enantioselective α‐alkylation of 1,3‐dicarbonyls with outstanding productivity (TON up to 1740). Highlights include broad electrophile scope spanning π‐activated and nonactivated reagents, stereo‐retentive allylation, simple catalyst synthesis, and efficient catalyst
Johanna Haußmann, Alexander Beck, Dominik Hornung, Michael Mistele, Alexander Allgaier, Wolfgang Frey, Joris van Slageren, Johannes Kästner, René Peters   +8 more
wiley   +1 more source

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

The nature of the silicaphilic fluorescence of PDMPO [PDF]

, 2015
PDMPO (2-(4-pyridyl)-5-((4-(2-dimethylaminoethylaminocarbamoyl)methoxy)phenyl)oxazole), has unique silica specific fluorescence and is used in biology to understand biosilicification.
Amat, Becke, Carole C. Perry, Charier, de Sousa Neto, DePedro, Dewar, Diwu, Diwu, Diwu, Durkin, Durkin, Elbergali, Faver, Francisco J. Martin-Martinez, Geerlings, Hammett, Hazelaar, Hilal, Hodson, Humphrey, Hurwitz, Ichinomiya, Ichinomiya, Kucki, Lakowicz, Law, Lee, Leffler, Li, Marini, Markus J. Buehler, Mataga, Mithun Parambath, Neese, Ogane, Ong, Perry, Plimpton, Quentin S. Hanley, Roach, Saxton, Scarminio, Shimizu, Tristan Giesa   +44 more
core   +1 more source

Mitochondrially targeted ceramides preferentially promote autophagy, retard cell growth, and induce apoptosis

Journal of Lipid Research, 2011
C6-pyridinium (d-erythro-2-N-[6′-(1′′-pyridinium)-hexanoyl]sphingosine bromide [LCL29]) is a cationic mitochondrion-targeting ceramide analog that promotes mitochondrial permeabilization and cancer cell death.
Qi Hou, Junfei Jin, Hui Zhou, Sergei A. Novgorodov, Alicja Bielawska, Zdzislaw M. Szulc, Yusuf A. Hannun, Lina M. Obeid, Yi-Te Hsu   +8 more
doaj   +1 more source

Discrimination of Lipid Hydroperoxide Positional Isomers Using SFC–MS/MS With Sodium Ion: Its Application to Evaluating the Oxidation Mechanisms of Oxidized Oils

Journal of the American Oil Chemists' Society, EarlyView.
ABSTRACT Advanced lipid profiling relies on liquid chromatography–tandem mass spectrometry (LC–MS/MS), but long analysis times remain a challenge. Supercritical fluid chromatography (SFC)–MS/MS using supercritical carbon dioxide offers a faster and more environmentally friendly alternative.
Ryosuke Aoki, Masayoshi Sakaino, Junya Ito, Shunji Kato, Jun Imagi, Toshiro Sato, Kiyotaka Nakagawa   +6 more
wiley   +1 more source

4-(3-Ethoxy-4-hydroxystyryl)-1-methylpyridinium tosylate monohydrate

Acta Crystallographica Section E, 2009
In the title compound, C16H18NO2+·C7H7O3S−·H2O, the dihedral angle between the pyridyl and benzene rings of the pyridinium cation is 0.2 (1)°. The benzene ring of the tosylate anion makes a dihedral angle of 4.8 (2)°
S. Murugavel, A. SubbiahPandi, C. Srikanth, S. Kalainathan   +3 more
doaj   +1 more source

Advanced Separation Technologies for Light Olefin and Alkane (C2‐C4): Recent Advances in Extraction, Adsorption, and Membrane Separation

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT With the rapid development of the petrochemical industry, efficient separation technology for olefins and alkanes with the same number of carbon atoms has become an important research topic to enhance the efficiency of petroleum resource utilization and optimize product quality.
Shasha Zhao, Kang Zhao, Zhen Liu
wiley   +1 more source

Regioselective suzuki coupling on pyridinium N-(3,5-dibromoheteroar-2-yl)aminides [PDF]

, 2006
A regioselective Suzuki-Miyaura cross-coupling reaction on 3',5'-dibromo pyridinium N-(2'-azinyl)aminides is reported. A series of 3'-aryl(or heteroaryl)-5-bromo-pyridinium N-(2'-pirazinyl)aminides were obtained in good yields.
Castillo Romero, Rafael, Izquierdo Ceinos, Ma Luisa, Reyes Prados, María José, Álvarez-Builla Gómez, Julio   +3 more
core   +3 more sources

4-(Dimethylamino)pyridinium 4-toluenesulfonate

Acta Crystallographica Section E, 2008
In the title compound, C7H11N2+·C7H7O3S−, the cation is protonated at the N atom of the heterocyclic ring. The dimethylamino group lies close to the pyridinium ring plane with a dihedral angle between the pyridinium and the dimethylamine CNC ...
Jim Simpson, C. John McAdam
doaj   +1 more source

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

Carbon 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, Yuzhen Zhao, Bo Fu, Yulong Zeng, Yinwen Chen, Qingrui Liu, Wenjing Luo, Xin Li, Xuewei Li, Zikang Zhang, Yun Zheng, Sijie Liu   +11 more
wiley   +1 more source