title: Fluorescent diarylindoles by palladium-catalyzed direct and decarboxylative arylations of carboxyindoles.
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).
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Miyasaka
authors.forename: Azusa
authors.initials: A
authors.lastname: Fukushima
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Satoh
authors.forename: Koji
authors.initials: K
authors.lastname: Hirano
authors.forename: Masahiro
authors.initials: M
authors.lastname: Miura
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry*; D002384:Catalysis; D003653:Decarboxylation; D005456:Fluorescent Dyes / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D014961:X-Ray Diffraction
chemical_list: D002264:Carboxylic Acids; D005456:Fluorescent Dyes; D007211:Indoles; D010165:Palladium; C030374:indole