Synthesis and structure of indoline spiropyrans of the coumarin series |
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Authors: | V F Traven V S Miroshnikov T A Chibisova V A Barachevsky O V Venidiktova Yu P Strokach |
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Institution: | (1) D. I. Mendeleev Chemical Technological University, 9 Miusskaya pl., 125047 Moscow, Russian Federation;(2) Photochemistry Center, Russian Academy of Sciences, 7a ul. Novatorov, 119421 Moscow, Russian Federation |
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Abstract: | New indoline spiropyrans of the coumarin series were synthesized by the condensation of indoline and hydroxyformylcoumarin
derivatives. Spiropyrans, viz., derivatives of 8-formyl-7-hydroxy-4-methylcoumarin and 5-formyl-6-hydroxy-4-methylcoumarin, under irradiation are transformed
into open forms, which are recyclized in the dark. The compounds formed by the condensation of the indoline derivatives with
3-formyl-4-hydroxycoumarin have an open structure of the merocyanine dyes and are transformed into spiro forms neither in
the dark nor under irradiation with the visible light.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2342–2349, October, 2005. |
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Keywords: | spiropyrans indole coumarin derivatives photochromic properties merocyanine derivatives |
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