title: Fluoradenes via palladium-catalyzed intramolecular arylation.
abstract: A novel approach towards 7b-aryl-indeno[1,2,3-jk]fluorene based on a nitrogen-containing core is reported. The acid-promoted Friedel-Crafts reaction of 9-(2-bromophenyl)-9-fluorenol with carbazole, triphenylamine or triindole afforded 9-(2-bromophenyl)fluorenyl-carbazole, -triphenylamine and -triindole derivatives, which were subsequently converted to 7b-aryl-fluoradenes via palladium-catalyzed intramolecular C-H direct arylation as a key step.
authors.affiliation: Department of Chemistry, East China Normal University, 3663 Zhongshan Rd(N), Shanghai 200062, China.
authors.forename: Lingling
authors.initials: L
authors.lastname: Rong
authors.forename: Qiancai
authors.initials: Q
authors.lastname: Liu
authors.forename: Yingbo
authors.initials: Y
authors.lastname: Shi
authors.forename: Jie
authors.initials: J
authors.lastname: Tang