Spiropyrans and spirooxazines |
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| Authors: | N. A. Voloshin A. V. Chernyshev S. O. Bezuglyi A. V. Metelitsa E. N. Voloshina V. I. Minkin |
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| Affiliation: | 1. South Scientific Center, Russian Academy of Sciences, 41 ul. Chekhova, 344006, Rostov-on-Don, Russian Federation
2. Scientific Research Institute of Physical and Organic Chemistry, South Federal University, 194/2 prosp Stachki, 344090, Rostov-on-Don, Russian Federation
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| Abstract: | The Duff formylation of 5-bromo- or 5-chloro-8-hydroxyquinoline leads to the corresponding 7-formyl derivatives, condensation of which with 2-methyleneindolines or 3H-indolium halides in the presence of a base afforded new photochromic 6′-halo-substituted spiro[indoline-2,2′-2H- pyrano[3,2-h]quinolines]. Thermal and photo-induced isomerization of compounds obtained have been investigated by 1H NMR and UV spectroscopy. |
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