Results 111 to 120 of about 16,017 (235)

Selective photo labeling of tryptophan in N‐acetyl‐L‐tryptophan ethyl ester and peptide WWCNDGR with a diaryl nitrenium ion

Photochemistry and Photobiology, EarlyView.
Visible light photolysis of a N‐(N,N‐diarylaminopyridinium) salt allows for covalent modification of a peptide. Mass spectrometry demonstrates that this procedure selectively labels tryptophan residues. Laser flash photolysis experiments show that bond formation occurs via a diarylnitrenium ion intermediate.
Edward S. Chinn, Yue Li, Abigail M. Joyce, Daniel E. Falvey   +3 more
wiley   +1 more source

Poly(pyridinium salt)s with Organic Counterions Derived from 3,3′-dimethylnaphthidine: Thermal, Liquid Crystalline, and Optical Properties

, 2015
A poly(pyridinium salt) was synthesized from 4,4′-(1,4-phenylene)bis(2,6-diphenylpyrilium)tosylate and 3,3′-dimethylnaphthidine. Tosylate counterion was exchanged with other organic counterions such as triflimide, 1-napthalenesulfonate, and 2 ...
Jose, Robin, Truong, Dat, Bhowmik, Pradip K., Han, Haesook   +3 more
core   +1 more source

Heart‐Specific Spinal and Vagal Afferents: Transcriptomic Signatures and Optogenetically Modulated Functional Coupling With Cardiomyocytes

Comprehensive Physiology, Volume 16, Issue 4, August 2026.
Selective purification of heart‐specific spinal and vagal sensory neurons by retrograde labeling and FACS purification showed enhanced spontaneous, optogenetic, and chemically stimulated Ca2+ activity. Transcriptomic profiling identified distinct ion channel and GPCR signatures in heart‐specific sensory neurons.
T. Akgul Caglar, Y. E. Kazci, Z. B. Durdu, S. Sahoglu Goktas, S. Bay, E. Vatandaslar, M. U. Turhan, G. Ozturk, E. Cagavi   +8 more
wiley   +1 more source

Modified Fry Cyanation of a Chiral Pyridinium Salt: Asymmetric Syntheses of (-)-Coniine and (-)-Solenopsin A

, 2013
International audienceThe synthesis of chiral 2-cyano-Δ4-tetrahydropyridine 5 was carried out in 85 % yield through a modified two-step Fry reductive cyanation of pyridinium salt (+)-3c that used lithium triethylborohydride as the hydride donor.
Jouanno, Laurie-Anne, Sourisak Sinbandhit, Thierry Roisnel, Dorcet, Vincent, Van Ha Vu, Vu, Van, Ha, Hurvois, Jean-Pierre, Adèle Cheignon, Jean‐Pierre Hurvois, Roisnel, Thierry, Vincent Dorcet, Cheignon, Adèle, Sinbandhit, Sourisak, Laurie‐Anne Jouanno   +13 more
core   +1 more source

4,4′-Bipyridine-1,1′-diium tetrachloridodifluoridostannate(IV) monohydrate

IUCrData
In the title hydrated salt, (C10H10N2)[SnF2Cl4]·H2O, the dihedral angle between the pyridinium rings in the cation is 40.5 (4)° and the F atoms in the octahedral complex anion have a cis disposition [F—Sn—F = 85.32 (17)°].
Amina Kemmouche, Rochdi Ghallab, Hocine Merazig   +2 more
doaj   +1 more source

A Proline‐Integrated Donor–Acceptor Fluorophore: Water‐Vapor‐Responsive Mechanochromic Luminescence and Latent Fingerprint Visualization

Advanced Optical Materials, Volume 14, Issue 25, 3 July 2026.
A proline‐integrated donor–acceptor fluorophore enables multifunctional luminescence through rational molecular design. Water‐vapor‐responsive mechanochromic luminescence (MCL) with circularly polarized luminescence (CPL) switching and efficient visualization of latent fingerprints (LFPs) are realized from this single small organic molecule.
Hao Chen, Kazuki Kato, Yoshitane Imai, Suguru Ito   +3 more
wiley   +1 more source

Synthesis and Characterization of Poly(pyridinium salt)s with Organic Counterion Exhibiting Both Lyotropic Liquid-Crystalline and Light-Emitting Properties^†

, 2016
Synthesis and Characterization of Poly(pyridinium salt)s with Organic Counterion Exhibiting Both Lyotropic Liquid-Crystalline and Light-Emitting Properties†
Haesook Han (2410312), Pradip K. Bhowmik (2410321), Ronald A. Burchett (3057642), James J. Cebe (2719735)   +3 more
core   +1 more source

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

Angewandte Chemie International Edition, Volume 65, Issue 27, 1 July 2026.
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

A Demonstration of the Synthetic Potential of Pyridinium Salt Photochemistry by Its Application to a Stereocontrolled Synthesis of (+)-Mannostatin A¹

, 2016
A Demonstration of the Synthetic Potential of Pyridinium Salt Photochemistry by Its Application to a Stereocontrolled Synthesis of (+)-Mannostatin ...
Rong Ling (3037014), Patrick S. Mariano (1909225)   +1 more
core   +1 more source

Multi‐Targeting Ligands as Prospective Therapeutics for Alzheimer's Disease, a Prevalent Neurodegenerative Disorder: Mechanistic Insights, Emerging Targets and Drug Discovery Campaigns

Medicinal Research Reviews, Volume 46, Issue 4, Page 1173-1229, July 2026.
ABSTRACT Alzheimer's disease (AD) is a debilitating neurodegenerative condition characterized by progressive cognitive impairment, memory deterioration, and neuronal dysfunction. Its complex pathophysiology involves multiple interlinked processes, including amyloid‐β (Aβ) aggregation, tau hyperphosphorylation, oxidative stress, neuroinflammation ...
Amandeep Thakur, Mandeep Rana, Sakshi Vanjani, Kei‐Chi Liou, Rajeev Taliyan, Kunal Nepali, Chih‐Hao Yang   +6 more
wiley   +1 more source