Abstract
New nonsymmetric dihetarylethenes were synthesized: 3-(5-methoxy-1,2-dimethyl-1H-indol-3-yl)-4-(3-thienyl)furan-2,5-dione and photochromic 1-alkyl-(1-aryl)-3-(5-methoxy-1,2-dimethyl-1H-indol-3-yl)-4-(3-thienyl)-1(H)-pyrrole-2,5-diones. The absence of benzoannulation in the indole moiety results in the enhancement of the efficiencies of fluorescence and photocyclization of noncyclic isomers compared to the benzoindole derivatives.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1866–1872, September, 2011.
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Makarova, N.I., Levchenko, P.V., Shepelenko, E.N. et al. Synthesis and photochromic properties of new nonsymmetric dihetarylethenes — indole and thiophene derivatives. Russ Chem Bull 60, 1899–1905 (2011). https://doi.org/10.1007/s11172-011-0286-5
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DOI: https://doi.org/10.1007/s11172-011-0286-5