M. Y. Belikov, S. V. Fedoseev, M. Y. Ievlev
Oct 1, 2019
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Journal
Russian Journal of Organic Chemistry
Abstract
Reaction of 5-substituted 2-hydroxybenzaldehydes with 2-[3-cyano-4,5,5-trimethylfuran-2(5H)-ylidene]propanedinitrile (tricyanofuran) in ethanol in the presence of ammonium acetate afforded 2-{3-cyano-4-[(E)-2-(2-hydroxyphenyl)ethenyl]-5,5-dimethylfuran-2(5H)-ylidene}propanedinitriles which were found to exhibit solid state fluorescence with the emission maxima ranging from λ 594 to 640 nm. Chromophores containing an alkyl substituent in the benzene ring showed the most intense fluorescence.