Results 61 to 70 of about 61,221 (238)

Pyridinium ylids in synthesis. III. Synthesis of indolizines

, 1967
Treatment of pyridinium, quinolinium, and isoquinolinium ylids with acetylenes yields indolizine derivatives. Pyridinium phenacylid with iodine in dimethylacetamide gives 1,2,3-tribenzoylindolizine.
CA Henrick, E Ritchie, WC Taylor
core   +1 more source

Mechanophotochemistry: Lighting up EDA Complexes in the Solid State

Angewandte Chemie, EarlyView.
Examples of mechanophotochemical EDA complex‐mediated radical reactions, including a Giese reaction, a C─S cross‐coupling reaction, a phosphorylation reaction, and a sulfonylation reaction are shown to rapidly proceed in air using visible light excitation.
Aniket Kumar Srivastawa, Eli Zysman‐Colman   +1 more
wiley   +2 more sources

Supramolecular Allostery Achieves Tunable Luminescence Aromatic Bridged Phenothiazine Noncovalent Frameworks

Advanced Science, EarlyView.
Tunable luminescent supramolecular organic framework enabled by multiple allosteric effects, composed of a tetracation vinylphenylpyridinium‐modified aromatic‐bridged phenothiazine guest and cucurbit[8]uril, not only exhibits unique guest oxidation‐driven NIR luminescence blue‐shift and effectively enhances the quantum yield by 46‐fold to 22.2% but ...
Xinping Lu, Jianchong Chen, Jie Yu
wiley   +1 more source

Chiroptical Switching by Stereoselective Photochemical Sigmatropic Rearrangements: Experimental Realization of Calderoselectivity

Angewandte Chemie, EarlyView.
Calderoselectivity is established as a stereochemical principle for sigmatropic rearrangements. A homoannulene‐based chiroptical photoswitch undergoes a photochemical [1,11] sigmatropic rearrangement with control of the acyl movement on top of the cyclic π system.
Anne Krenkel, Frederike Beyer, Malte Feßner, Trung Tran Ngoc, Tobias Rüffer, Dominik Hornig, Martin Breugst, Christian Merten, Johannes F. Teichert   +8 more
wiley   +2 more sources

Crystal structure and thermal behaviour of pyridinium styphnate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the crystal structure of the title molecular salt, C5H6N+·C6H2N3O8− (systematic name: pyridinium 3-hydroxy-2,4,6-trinitrophenolate), the pyridinium cation and the 3-hydroxy-2,4,6-trinitrophenolate anion are linked through bifurcated N—H...(O,O ...
Selvarasu Muthulakshmi, Doraisamyraja Kalaivani   +1 more
doaj   +1 more source

Sub‐Second Ratiometric Fluorescence Imaging of Histamine Dynamics in Living Cells via a Supramolecular Probe

Advanced Science, EarlyView.
A tailored tripartite supramolecular ratiometric probe, engineered by modulating the fluorogenic guest's cationic locus, enables ultrafast histamine monitoring in living cells. Utilizing a competitive displacement mechanism, this system achieves a sub‐second response time with high selectivity.
Chenming Chan, Yujie Han, Yu‐Fei Song, Chunlei Jiang, Qi‐Wei Zhang   +4 more
wiley   +1 more source

Phosphonium Ionic Liquids for Electrochemical Energy Storage: Structure–Property–Interphase Relationships and Design Rule

Advanced Science, EarlyView.
Phosphonium ionic liquids offer a versatile platform for safer and more durable energy storage. This Review connects cation–anion structure with solvation, ion transport, electrochemical stability, and interphase formation across diverse battery chemistries.
Amir Haghipour, Ishanka Thennakoon, Aishwaryaba Jadeja, Daniel Rauber, Markus Gallei, Rolf Hempelmann, Sangwon Kim, Jungtae Kim   +7 more
wiley   +1 more source

Discovery of Quinazolone Pyridiniums as Potential Broad-Spectrum Antibacterial Agents

Molecules
The overprescription of antibiotics in medicine and agriculture has accelerated the development and spread of antibiotic resistance in bacteria, which severely limits the arsenal available to clinicians for treating bacterial infections.
Jie Dai, Qianyue Li, Ziyi Li, Zhonglin Zang, Yan Luo, Chenghe Zhou   +5 more
doaj   +1 more source

Cetyl-pyridinium chloride is useful for isolation of Mycobacterium tuberculosis from sputa subjected to long-term storage. [PDF]

, 2005
Recovery of Mycobacterium tuberculosis from sputa treated with cetyl-pyridinium chloride (CPC) and stored for 20 +/- 9 days was significantly higher than that from sputa that were untreated and processed by the N-acetyl-L-cisteine-NaOH method.
Orefici, Graziella, Varaine, Francis, Iona, Elisabetta, Arzumanian, Erchanik, Varaine, F, Fattorini, L, Fattorini, Lanfranco, Orefici, G, Arzumanian, E, Checchi, F, Checchi, Francesco, Iona, E, Oggioni, Marco Rinaldo, Pardini, Manuela, Oggioni, M R, Pardini, M, Checchi F, Orefici G, Fattorini L, Arzumanian E, Pardini M, Oggioni MR, Varaine F, Iona E   +23 more
core   +1 more source

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