Abstract
The method for the synthesis of indoles from nitropyridinium salts has been improved. A method for synthesizing novel derivatives of indoleninium quaternary salts has been developed. The condensation of indoleninium salts with formyl derivatives of crown ethers leading to styryl dyes is described. Photoisomerization and complexing of crown-ether dyes with ions of alkaline and alkaline-earth metals have been studied. The shift of the long-wave absorption maximum has been observed to depend on the size and charge density of the metal cation.
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For communication 8, see ref. 1.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1625–1632, September, 1993.
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Gromov, S.P., Fomina, M.V. & Alfimov, M.V. Crown ether-containing styryl dyes. Russ Chem Bull 42, 1561–1569 (1993). https://doi.org/10.1007/BF00699196
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DOI: https://doi.org/10.1007/BF00699196