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Oxidation of polysubstituted pyridinium salts
Collection of Czechoslovak Chemical Communications, 1982Oxidation of 1-substituted 2,4,6-triphenylpyridinium salts Ia-Ij with potassium ferricyanide in an alkaline medium was accompanied by contraction of the pyridine ring and formation of 1,2,3,5-tetrasubstituted pyrroles II. The derivative IIf underwent facile electrophilic substitution in the position 4. Contrary to compounds Ia-Ij, the 1-substituted-2,6-
Petr Nesvadba, Josef Kuthan
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Investigation of Methyl Pyridinium-2-aldoxime Salts
Journal of Pharmaceutical Sciences, 1961Methyl pyridinium-2-aldoxime iodide (2-PAM iodide) has been reported to be effective in preventing and overcoming the toxic effects in animals poisoned with organic phosphorus compounds that are inhibitors of the cholinesterase enzymes. In order to obtain greater water solubility of the oxime and to eliminate undesirable side effects due to the iodide ...
A A, KONDRITZER, R I, ELLIN, L J, EDBERG
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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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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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Syntheses Using Pyridinium Salts
Angewandte Chemie International Edition in English, 1963AbstractThis review discusses syntheses leading to a new type of N‐vinylpyridinium salts, to novel anionocyanines, to aminophenazines and alloxazines, as well as to (aza‐) dehydroquinolizinium, acridizinium, and morphanthridizinium salts. In addition, Mannich reactions and aminoalkylations at active methylene groups of cycloimmonium salts, and their ...
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Oxidative Diphosphonylation of 1,4-Dihydropyridines and Pyridinium Salts
Organic Letters, 2000An 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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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 +6 more
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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 +6 more
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Redox reactions of pyridinium salts
Tetrahedron Letters, 1975Alexander Shirra, Colin J. Suckling
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Pyridinium Salts as Redox-Active Functional Group Transfer Reagents
Angewandte Chemie - International Edition, 2020Guillaume Dagousset +2 more
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