Results 81 to 90 of about 36,949 (232)
Frontiers in Chemistry, 2019 Structurally modified hydroxyl functionalized pyridinium ionic liquids (ILs), liquid at room temperature, were synthesized and characterized. Alkylated N-(2-hydroxyethyl)-pyridinium ILs were prepared from alkylpyridines via corresponding bromide salts by
Kallidanthiyil Chellappan Lethesh +6 more
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Photosensitizing Au(I) Catalysis With Coumarins
Chemistry – A European Journal, EarlyView.A Au(I) complex with a tethered coumarin fragment was synthesized and characterized by UV‐vis and emission spectroscopy. Its ability to facilitate photo‐driven cross‐coupling reactions through single‐electron and energy transfer events was evaluated. ABSTRACT Gold catalysis shows versatility in a wide range of challenging transformations, wherein light‐
Liliana Capulín Flores +2 more
wiley +1 more source
Hexaaquazinc(II) dinitrate bis[5-(pyridinium-3-yl)tetrazol-1-ide]
Acta Crystallographica Section E: Crystallographic Communications, 2018 Hexaaquazinc(II) dinitrate 5-(pyridinium-3-yl)tetrazol-1-ide, [Zn(H2O)6](NO3)2·2C6H5N5, crystallizes in the space group P\overline{1}. The asymmetric unit contains one zwitterionic 5-(pyridinium-3-yl)tetrazol-1-ide molecule, one NO3− anion and one half ...
Ignacio Chi-Duran +4 more
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Chemistry – A European Journal, EarlyView.The synthesis of dithieno[3,2‐b:2′,3′‐e]pyridines (DTPs) is herein reported, and their optical properties are studied both experimentally and computationally. Protonation or methylation of the nitrogen atom induced bathochromic shifts in their absorption and emission spectra.
Dominic Taylor +7 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 +6 more
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Precision Chemistry for Protein Lysine Modification
Chemistry – A European Journal, EarlyView.Selective modification of lysine residues is challenging due to their similar intrinsic reactivity. Inspired by enzymatic recognition, ligand‐guided electrophiles enable site‐selective labeling and functionalization, while ligand‐guided catalyses achieve regioselective installation of bio‐relevant post‐translational modifications.
Mayu Onoda, Motomu Kanai
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MolbankWe report the synthesis and characterization of the novel pyridinium salts from (E)-2-(pyridin-4-ylmethylene)hydrazine-1-carboximidamide. The pyridinium salts were obtained via the reaction of guanylhydrazone derived from pyridine-4-carbaldehyde with ...
Fatemeh Ataie Alani +3 more
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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 +8 more
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The neurotoxicity of pyridinium metabolites of haloperidol
Postępy Higieny i Medycyny Doświadczalnej, 2015 Haloperydol is a butyrophenone, typical neuroleptic agent characterized as a high antipsychotics effects in the treatment of schizophrenia and in palliative care to alleviation many syndromes, such as naursea, vomiting and delirium. Clinical problems occurs during and after administration of the drug are side effects, particularly extrapyrramidal ...
Agnieszka, Górska +2 more
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FLP Mediated Conversion of Difluorobenzylalkynes to Fluoroallenyl Oniums via an SN1’ Pathway
Chemistry – A European Journal, EarlyView.Frustrated Lewis pair (FLP) selective C‒F activation of difluorobenzylalkynes allows the formation of fluoroallenic oniums via an SN1’ substitution pathway. The fluoroallenic onium salts are synthetic precursors that allow subsequent functionalization at allenic and onium positions.
Max Coles +6 more
wiley +1 more source