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- W2951232451 abstract "Abstract The silver-catalyzed decar☐ylation of car☐ylic acids by persulphate leads to alkyl radicals, which have been utilized for the selective alkylation of heteroaromatic bases. The method is particularly efficient in a water-chlorobenzene two-phase system for two reasons : it considerably increases the selectivity in monoalkylation when more positions of high nucleophilic reactivity (i.e. α and γ ) are available in the heterocyclic ring (i.e. quinoline , 4-cyano- and 4-ethylpyridine, pyrazine , quinoxaline etc.) and it determines a much higher efficiency for the radical sources when the silver salt catalysis is deactivated by complexation of the salt with the heterocyclic compound . The high selectivity in monoalkylation has been obtained by the combination of polar effects and the increased lipophilicity of the alkylated product, which makes its extraction from the aqueous solution by the organic solvent easier." @default.
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- W2951232451 date "1990-08-14" @default.
- W2951232451 modified "2023-09-24" @default.
- W2951232451 title "ChemInform Abstract: Homolytic Alkylation of Heteroaromatic Bases: The Problem of Monoalkylation." @default.
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- W2951232451 doi "https://doi.org/10.1002/chin.199033125" @default.
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