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Updated: Sep 29, 2025
Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments
Published on: May 11, 2017
Acenaphthenoannulation Induced by the Dual Lewis Acidity of Alumina
Vladimir Akhmetov1, Mikhail Feofanov1, Cordula Ruppenstein1
1Martin-Luther-Universität Halle-Wittenberg, Institute of Chemistry, Organic Chemistry, Kurt-Mothes-Strasse 2, 06120, Halle, Germany.
Abstract:
We have discovered a dual (i. e., soft and hard) Lewis acidity of alumina that enables rapid one-pot π-extension through the activation of terminal alkynes followed by C-F activation. The tandem reaction introduces an acenaphthene fragment - an essential moiety of geodesic polyarenes. This reaction provides quick access to elusive non-alternant polyarenes such as π-extended buckybowls and helicenes through three-point annulation of the 1-(2-ethynyl-6-fluorophenyl)naphthalene moiety. The versatility of the developed method was demonstrated by the synthesis of unprecedented structural fragments of elusive geodesic graphene nanoribbons.
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