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- W2012303531 abstract "Abstract A new method using chalcogen nucleophiles E2−/E22− (E = S, Se, Te) for the convenient and high yield synthesis of benzimidazolin-2-chalcogenones has been developed. The reaction of strong nucleophiles E2−/E22− with various benzimidazolium salts under mild conditions afforded benzimidazolin-2-chalcogenones (10a–10g) in better yield compared to the other methods involving E0 powder. Benzimidazolin-2-tellurones were found to be unstable when pyridyl/phenyl groups were bonded to one of the nitrogens of the benzimidazolium salts and the reaction led to the isolation of the corresponding diamines (12a and 12b). The selenones/tellurones could be easily oxidized to the corresponding dihaloderivatives (16a–16e) by the reaction of the chalcogenones with bromine/iodine. The nature of the carbon–chalcogen double bond has been investigated with the help of single crystal X-ray, NMR spectroscopy and Density Functional Theory (DFT) calculations." @default.
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- W2012303531 date "2013-03-05" @default.
- W2012303531 modified "2023-09-23" @default.
- W2012303531 title "ChemInform Abstract: Facile Synthesis of Benzimidazolin-2-chalcogenones: Nature of the Carbon-Chalcogen Bond." @default.
- W2012303531 cites W2951669386 @default.
- W2012303531 doi "https://doi.org/10.1002/chin.201310196" @default.
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