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Title compounds (III) are easily and simply synthesized with low catalyst loading and without protection of the amino group.

Starting materials (I) are readily prepared by condensation of 1,3-diarylacetones with ninhydrin.

A novel approach to the title compounds (II), required as electron-donating components in material chemistry, is developed via C—X/C—H coupling of N-(2-bromoaryl)-substituted carbazoles.

A series of 2-amino-4-aryl-6-(9,9′-spirobifluoren-2-yl)pyrimidines have been synthesized by the reaction of guanidine and chalcones under basic conditions. The physical and optical properties indicated that these compounds generally show good blue light emissions and excellent thermal stabilities. Intermolecular hydrogen bonds and interactions have strong influences on their properties.

The acid-promoted mono- or dialkylation of carbazoles (I) with fluorenol (II) followed by palladium-catalyzed intramolecular arylation of intermediates (III) and (V) gives rise to novel fluoradenes (IV) and (VI).

The diindenocarbazole derivatives are synthesized by the reaction of 2,7-dibromo-9-hexylcarbazole with benzoyl chloride under Friedel-Crafts conditions, followed by Wolff-Kishner-Huang reduction to produce 3,6-dibenzyl-2,7-dibromo-9-hexylcarbazole, which was cyclized to form bis(indeno)-9-hexylcarbazole by palladium-catalyzed double intramolecular arylation. The diindeno-carbazole was further converted into fully alkylated compounds.