title: Modular synthesis of benzimidazole-fused phenanthridines from 2-arylbenzimidazoles and o-dibromoarenes by a palladium-catalyzed cascade process.
abstract: An efficient palladium-catalyzed route for the synthesis of benzimidazole-fused phenanthridines from o-dibromoarenes and 2-arylbenzimidazoles is described. The sequentially accomplished reaction comprises intermolecular C-H arylation of 2-arylbenzimidazoles followed by an intramolecular N-arylation reaction promoted by the same Pd catalyst. This Pd-catalyzed double arylation provides a useful tool for the discovery of fluorescent materials.
authors.affiliation: Department of Chemistry and Chemical Engineering, College of Science, and ‡Post-doctoral Mobile Research Station of Forestry Engineering, Northeast Forestry University , Harbin 150040, P. R. China.
authors.forename: Chunxia
authors.initials: C
authors.lastname: Chen
authors.forename: Guoning
authors.initials: G
authors.lastname: Shang
authors.forename: Jingjie
authors.initials: J
authors.lastname: Zhou
authors.forename: Yanhan
authors.initials: Y
authors.lastname: Yu
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Jinsong
authors.initials: J
authors.lastname: Peng