N. A. Voloshin, A. Chernyshev, S. O. Bezuglyi
2008
Citations
0
Influential Citations
20
Citations
Journal
Russian Chemical Bulletin
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.