Unusual solid-state luminescent push-pull indolones: a general one-pot three-component approach.
In a consecutive three-component cyclocarbopalladation, Sonogashira coupling, Michael addition sequence 4-aminopropenylidene indolones, i.e., terminally fixed push-pull chromophores, are obtained in yields as high as 99%. Most remarkable, however, is the pronounced orange red solid state fluorescence displaying large Stokes shifts of these merocyanines, in particular, since all chromophores are nonfluorescent in solution.
D'Souza
Daniel M
DM
Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universitat Düsseldorf, Universitätsstrasse 1, D-40225 Düsseldorf, Germany.
Muschelknautz
Christian
C
Rominger
Frank
F
Müller
Thomas J J
TJ