162. Direct coupling of carbenium ions with indoles and anilines for the synthesis of cationic π-conjugated dyes
     Rémi Vanel, François-Alexandre Miannay, Eric Vauthey, Jérôme Lacour
     Chem. Commun. 2014, 50, 12169-12172

A C-C bond forming reaction occurs spontaneously between tris-(2,6-dimethoxyphenyl)carbenium ion and indoles / anilines. The carbocation acts both as electrophile and oxidant. Effective cationic π-conjugated dyes are formed resulting in a strong hyper- and bathochromism

DOI: 10.1039/C4CC05193A 

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