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
在连续的三组分环碳链
脲酸酯化,Sonogashira偶联中,迈克尔加成序列4-
氨基
丙烯亚基
吲哚酮,即末端固定的推挽生色团,收率高达99%。然而,最引人注目的是显着的橙红色固态荧光,显示这些花菁的大斯托克斯位移,特别是因为所有发色团在溶液中都不发荧光。