title: One-pot synthesis of highly substituted polyheteroaromatic compounds by rhodium(III)-catalyzed multiple C-H activation and annulation.
abstract: A new method for the synthesis of highly substituted naphthyridine-based polyheteroaromatic compounds in high yields proceeds through rhodium(III)-catalyzed multiple C-H bond cleavage and C-C and C-N bond formation in a one-pot process. Such highly substituted polyheteroaromatic compounds have attracted much attention because of their unique π-conjugation, which make them suitable materials for organic semiconductors and luminescent materials. Furthermore, a possible mechanism, which involves multiple chelation-assisted ortho C-H activation, alkyne insertion, and reductive elimination, is proposed for this transformation.
authors.affiliation: Department of Chemistry, National Tsing Hua University, Hsinchu 30013 (Taiwan) http://mx.nthu.edu.tw/%7Echcheng.
authors.forename: Jayachandran
authors.initials: J
authors.lastname: Jayakumar
authors.forename: Kanniyappan
authors.initials: K
authors.lastname: Parthasarathy
authors.forename: Yi-Hsiang
authors.initials: YH
authors.lastname: Chen
authors.forename: Tai-Hua
authors.initials: TH
authors.lastname: Lee
authors.forename: Shih-Ching
authors.initials: SC
authors.lastname: Chuang
authors.forename: Chien-Hong
authors.initials: CH
authors.lastname: Cheng
keywords: CH activation; alkynes; annulation; benzamidines; rhodium