Results 211 to 220 of about 23,873 (241)

VIBRATIONAL SPECTRA OF PYRIDINIUM SALTS

Canadian Journal of Chemistry, 1961
The vibrational spectrum of the pyridinium ion, C5H5NH+, and the N-deuterated species has been studied in several pyridinium salts. By comparison with benzene and deuterobenzene (with which the pyridinium ion is isoelectronic) a fairly complete assignment has been made. The N—H bonds, which are hydrogen bonded to the anions, have stretching vibrations
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Pyridinium salts and dihydropyridines; mechanistic studies of the redox reaction between pyridinium salts and alkoxides in tetrahydrofuran

Journal of the Chemical Society, Perkin Transactions 2, 1977
A model system for NAD-dependent redox reactions has been designed in an attempt to assess the involvement of covalent adducts as intermediates. The system consists of 3-substituted 1-n-heptylpyridinium salts and substituted benzyl alkoxides. Although covalent adducts were found in the reaction mixture, studies of substituent effects and other ...
Alexander Shirra, Colin J. Suckling
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Oxidative Diphosphonylation of 1,4-Dihydropyridines and Pyridinium Salts

Organic Letters, 2000
An oxidative double phosphonylation of dihydropyridines 1 and pyridinium salts 2 is achieved through the use of dialkyl phosphites, DDQ, and triethylamine. Acceptable to good yields of 2, 6-diphosphonylated-1,2-dihydropyridines 3 are obtained in a one-pot reaction involving tandem nucleophilic addition/oxidation processes.
, Lavilla, , Spada, , Bosch
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Azulene‐substituted pyridines and pyridinium salts. Synthesis and structure. 2. Azulene‐substituted pyridinium salts

Journal of Heterocyclic Chemistry, 2007
Abstractmagnified image4‐Azulen‐1‐yl substituted 2,6‐dimethyl‐and 2,6‐diphenyl‐pyridinium salts are obtained in yields between 50 % and 100 % in the reaction of corresponding 4‐azulen‐1‐yl‐pyranylim salts and various amines. The effects of amine structure and of substitution in the heterocycle or at azulene moieties on the synthesis have been ...
Alexandru C. Razus, Liviu Birzan, Claudia Pavel, Oana Lehadus, Andreea Corbu, Filip Chiraleu, Cristian Enache   +6 more
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ChemInform Abstract: Reactions of Pyridinium N‐Ylides and Their Related Pyridinium Salts

ChemInform, 2012
AbstractReview: 112 refs.
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Redox reactions of pyridinium salts

Tetrahedron Letters, 1975
Alexander Shirra, Colin J. Suckling
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N-Substitutes Pyridinium Salts

HETEROCYCLES, 1989
Wanda Sliwa, Barbara Mianowska
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Pyridinium and Quinolinium Salts

2012
D. Uraguchi, T. Ooi
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The density of fused pyridinium salts

Journal of Chemical & Engineering Data, 1976
David S. Newman, David P. Morgan, Richard T. Tillack   +2 more
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Pyridinium Salts as Redox‐Active Functional Group Transfer Reagents

Angewandte Chemie - International Edition, 2020
Simon L Rössler, Benson J Jelier, Emmanuel Magnier   +2 more
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