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Enantioselective Synthesis of [9]‐ and [11]Helicene‐like Molecules: Double Intramolecular [2+2+2] Cycloaddition |
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| Authors: | Yuki Kimura Naohiro Fukawa Yuta Miyauchi Prof?Dr Keiichi Noguchi Prof?Dr Ken Tanaka |
| Institution: | 1. Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184‐8588 (Japan);2. Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184‐8588 (Japan);3. Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro‐ku, Tokyo 152‐8550 (Japan) http://www.tuat.ac.jp/～tanaka‐k/;4. Japan Science and Technology Agency, ACT‐C, 4‐1‐8 Honcho, Kawaguchi, Saitama, 332‐0012 (Japan) |
| Abstract: | The enantioselective synthesis of completely ortho‐fused 9]‐ and 11]helicene‐like molecules has been achieved through a rhodium‐mediated, intramolecular, double 2+2+2] cycloaddition of phenol‐ or 2‐naphthol‐linked hexaynes. Crystal structures and photophysical properties of these 9]‐ and 11]helicene‐like molecules have also been disclosed. |
| Keywords: | alkynes cycloaddition enantioselectivity helical structures rhodium |