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Updated: Aug 16, 2025

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
Published on: September 18, 2016
Two-Step Synthesis, Structure, and Optical Features of a Double Hetero[7]helicene
Mohamed S H Salem1,2, Ahmed Sabri1, Md Imrul Khalid1
1SANKEN, Osaka University, Ibaraki-shi, Osaka 567-0047, Japan.
Abstract:
A novel double aza-oxa[7]helicene was synthesized from the commercially available N,N-di(naphthalen-2-yl)benzene-1,4-diamine and p-benzoquinone in two steps. Combining the acid-mediated annulation with the electrochemical sequential reaction (oxidative coupling and dehydrative cyclization) afforded this double hetero[7]helicene. Moreover, the structural and optical features of this molecule have been studied using X-ray crystallographic analysis, and the absorption and emission behaviors were rationalized based on DFT calculations.
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