Newphotochromic chromenes annulated with a furan ring have been synthesized. Thus, suitable heterocyclic phenols react with different propargylic alcohols in acidic medium to give the corresponding ethers, which cyclize into benzopyrans by thermal Claisen rearrangement. This synthetic approach was found to lead to a mixture of linear and angular chromenes that is strictly related to the nature of
Synthesis and Spectral-Luminescent Properties of Fluorescent Dyads Based on Tetraarylimidazole and Azomethines of Various Nature
作者:A. I. Shienok、O. N. Krutius、I. R. Mardaleishvili、L. S. Kol’tsova、L. D. Popov、E. N. Shepelenko、N. L. Zaichenko
DOI:10.1134/s1070363221100285
日期:2021.10
Benzoid-quinoid tautomerism of azomethines and their structural analogs: LIV. Dibenzo(benzo)-18-crown-6-containing Imines of 5-hydroxy-2,3-tetramethylene- and 5-Hydroxy-2,3-diphenylbenzo[b]furan-4-carbaldehydes
作者:A. D. Dubonosov、A. V. Tsukanov、E. N. Shepelenko、Yu. V. Revinskii、V. A. Bren’、V. I. Minkin
DOI:10.1134/s1070428009020079
日期:2009.2
Dibenzo(benzo)-18-crown-6-containing N-arylimines of 5-hydroxy-2,3-tetramethylene- and 5-hydroxy-2,3-diphenylbenzo[b]-furan-4-carbaldehydes were synthesized and their spectral luminescence properties were investigated. In solutions of 6-bromo- and 6-nitro-substituted compounds a tautomeric equilibrium exists between the benzoid and quinoid forms. In the course of complexing of crown-ether-imines of 5-hydroxy-6-nitro-2,3-diphenylbenzo[b]furan-4-carbaldehyde and 5-hydroxy-6-nitro-2,3-tetramethylenebenzo[b]furan-4-carbaldehyde with cations of alkali and alkaline earth metals the content of the quinoid form was found to decrease. This phenomenon was accompanied by essential changes in the absorption and fluorescence spectra characteristic of chemosensor systems with an intramolecular charge transfer (ICT).
Photo-and thermochromic spiranes. 25. New indolinospiropyrans containing a condensed furan fragment
作者:B. S. Lukyanov、A. N. Utenyshev、E. N. Shepelenko、V. V. Tkachev、M. B. Lukyanova、A. V. Metelitsa、S. O. Bezuglyi、S. M. Aldoshin、V. I. Minkin
DOI:10.1007/s10593-006-0170-7
日期:2006.7
Novel indolinospiropyrans containing a condensed furan moiety
作者:B. S. Luk'yanov、E. N. Shepelenko、V. A. Bren'、A. O. Bulanov