title: Enantioselective synthesis and enhanced circularly polarized luminescence of S-shaped double azahelicenes.
abstract: The enantioselective synthesis of azahelicenes and S-shaped double azahelicenes has been achieved via the Au-catalyzed sequential intramolecular hydroarylation of alkynes. The use of excess AgOTf toward a Au(I) complex is crucial for this transformation. Interestingly, the circularly polarized luminescence activity of the S-shaped double azahelicenes was significantly higher than that of the azahelicenes.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology , Koganei, Tokyo 184-8588, Japan.
authors.forename: Kyosuke
authors.initials: K
authors.lastname: Nakamura
authors.forename: Seiichi
authors.initials: S
authors.lastname: Furumi
authors.forename: Masayuki
authors.initials: M
authors.lastname: Takeuchi
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Shibuya
authors.forename: Ken
authors.initials: K
authors.lastname: Tanaka