title: Novel route to azobenzenes via Pd-catalyzed coupling reactions of aryl hydrazides with aryl halides, followed by direct oxidations.
abstract: [reaction: see text] N-Boc aryl hydrazines undergo Pd-catalyzed coupling reactions with aryl halides to provide N-Boc diaryl hydrazines in excellent yields. The resulting N-Boc diaryl hydrazines were directly oxidized with NBS/pyridine in CH(2)Cl(2) at room temperature to the azobenzenes.
authors.affiliation: Department of Chemistry, Hanyang University, Seoul 133-791, Korea.
authors.forename: Young-Kwan
authors.initials: YK
authors.lastname: Lim
authors.forename: Kang-Sang
authors.initials: KS
authors.lastname: Lee
authors.forename: Cheon-Gyu
authors.initials: CG
authors.lastname: Cho