Abstract
New 3-indolylfulgides, viz., 3-[1-(1-aryl-5-methoxy-2-methyl-1H-indol-3-yl)ethylidene]-4-(1-methylethylidene)tetrahydro-2,5-furandiones, were synthesized. These compounds were obtained as E-isomers, as demonstrated by X-ray diffraction, electronic spectroscopy, and 1H NMR spectroscopy. Fulgides exhibit photochromic properties in solution. The cyclic dihydrocarbazole photoisomers of indolylfulgides show fluorescence properties and are characterized by high thermal stability.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1417–1423, July, 2008.
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Balenko, S.K., Rybalkin, V.P., Makarova, N.I. et al. Synthesis, structures, and photochromic properties of N-aryl-3-indolylfulgides. Russ Chem Bull 57, 1435–1443 (2008). https://doi.org/10.1007/s11172-008-0186-5
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DOI: https://doi.org/10.1007/s11172-008-0186-5