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Updated: May 1, 2026

Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
Published on: August 22, 2018
Enantioselective synthesis and enhanced circularly polarized luminescence of S-shaped double azahelicenes
Kyosuke Nakamura1, Seiichi Furumi, Masayuki Takeuchi
1Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology , Koganei, Tokyo 184-8588, Japan.
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.
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