An efficient one-pot synthesis simultaneously results in three types of densely substituted mono-, di- and tetracyclic pi-systems, which can easily be isolated. Each chromophore presents a strong fluorescence emission, either in the red, green or blue part of the spectrum. (C) 2008 Elsevier Ltd. All rights reserved.
An Efficient and Facile Synthesis of Highly Substituted 2,6-Dicyanoanilines
A one-pot procedure for the synthesis of substituted 2,6-dicyanoanilines starting from readily available ynones and malononitrile has been developed. For instance, penta-1,4-diyn-3-one is converted into the acetylene-substituted aniline derivative 1 in good yield. Upon photoexcitation, this chromophore shows a strong blue emission with a high quantum yield. The ground- and the excited-state geometries