Results 161 to 170 of about 60,247 (222)

Pyridinium halide promoted ring-opening reactions of exo-norbornene oxide

, 1983
Ring opening of 1 with pyridinium chloride or pyridinium iodide in chloroform and/or pyridine gives significant amounts of halohydrins 2a or 2b, reflecting partial suppression of the Wagner-Meerwein rearrangement that occurs on ring-opening with hydrogen
G. Gargaro, PELLACANI, Lucio, LORETO, Maria Antonietta, TARDELLA, Paolo Antonio   +3 more
core  

Multivalent-Anion-Induced Inversion of Chiroptical Signals in a Cyanine Dye Bound to Nanotubular Supramolecular Assemblies. [PDF]

Langmuir
Otsuki M, Hano N, Ihara H, Takafuji M.
europepmc   +1 more source

Pyridinium Design for Deaminative Reactions of Sterically Encumbered Alkyl Amines. [PDF]

Org Lett
Enudi OC, Twitty JC, Rotella ME, Underwood SJ, Kozlowski MC, Watson MP.   +5 more
europepmc   +1 more source

Hyperpolarization of Pyridine 15N‐Oxide Molecular Probes Enabled by Parahydrogen

Angewandte Chemie, Volume 138, Issue 37, 7 September 2026.
Pyridine 15N‐oxides are introduced as motifs for hyperpolarization studies and biochemical applications are demonstrated. ABSTRACT Magnetic resonance (MR) is a powerful non‐invasive technique for probing structural, functional, and metabolic processes with high spatial and temporal resolution.
Ruhuai Mei, Lisa Maria Fries, Gonzalo Gabriel Rodriguez, Charlotte von Petersdorff‐Campen, Leander Konstantin May, Julius Frederik Matz, Sergey Korchak, Grysette Daher, Stefan Glöggler   +8 more
wiley   +2 more sources

Metal-Free Active Template: A Straightforward Route to 4-Aminopyridinium-Based Rotaxane Molecular Shuttles. [PDF]

Angew Chem Int Ed Engl
Stoyanov I, van der Lee A, Coutrot F.
europepmc   +1 more source

Expanding the Scope of 1,2‐Diazepines Through Alternative Activation Strategies

European Journal of Organic Chemistry, Volume 29, Issue 35, 19 September 2026.
Often overlooked due to tedious synthetic routes, 1,2‐diazepines can be found in handful of biorelevant molecules. Previous reports from our group lifted the principal synthetic lock: a rapid and user‐friendly protocol to reach monocyclic 1,2‐diazepines from readily available pyridines and electrophilic activating groups. Herein, we extend the scope of
Alexis Leblais, Diego Robles, Aurélie Damond, Xavier Moreau, Clément Ghiazza   +4 more
wiley   +1 more source

Beyond the Fixed Charge: A New On‐Tissue Derivatisation Strategy Employing Photoionisable Chromophores for Mass Spectrometry Imaging of Amino‐Containing Metabolites

Angewandte Chemie, Volume 138, Issue 37, 7 September 2026.
We introduce a novel chemical derivatisation strategy for the UV‐activated detection of elusive metabolites. Incorporation of a tocopherol‐active chromophore allows for the detection of tagged analytes as photoionised radical cations, selectively induced by a 266 nm laser.
Sofia R. McGowan, Andrew J. Tague, Ashna A. Kumar, Marie Ranson, Christopher J. T. Hyland, Shane R. Ellis   +5 more
wiley   +2 more sources

Efficient and versatile supramolecular functionalization of polysilicon microchips with cationic amphiphile salts for incorporation of therapeutics. [PDF]

Mikrochim Acta
Alea-Reyes ME, Bagherpour S, Duch M, Plaza JA, Pérez-García L.   +4 more
europepmc   +1 more source

A Solvent‐Free Approach for the Mechanochemical Upcycling of Bio‐ and Fossil‐Based Polyesters Into Value‐Added Chemicals and Bio‐Based Plasticizers

ChemSusChem, Volume 19, Issue 17, 14 September 2026.
Mechanochemical upcycling of bio‐ and fossil‐based polyesters with alcohols and amines using MeONa as the catalyst selectively produces synthetically useful diesters and diamides, giving only alcohols as byproducts. This green and efficient protocol is readily scalable and can be transferred to the upcycling of polyester‐based postconsumer waste ...
Divya Jain, Nora Jannsen, Riko Siewert, Dzmitry Zaitsau, Hans‐Joachim Drexler, Torsten Beweries   +5 more
wiley   +1 more source

Positional isomerization of pyridine through nitrogen transposition. [PDF]

Nature
Choi W, Ju H, Park J, Hong S.
europepmc   +1 more source