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  • Title: Fluorescent diarylindoles by palladium-catalyzed direct and decarboxylative arylations of carboxyindoles.
    Author: Miyasaka M, Fukushima A, Satoh T, Hirano K, Miura M.
    Journal: Chemistry; 2009; 15(15):3674-7. PubMed ID: 19248058.
    Abstract:
    Simple and brilliant: 1-Substituted 1H-indole-2-carboxylic acids efficiently undergo successive diarylation accompanied by C-H bond cleavage and decarboxylation upon treatment with aryl bromides in the presence of a palladium catalyst system to afford fluorescent 2,3-diarylindoles. This facile synthetic method provides a highly efficient blue emitter with a quantum yield of 0.97 in the solid state (see scheme).
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