American Chemical Society
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A Fragment-Based Approach toward Substituted Trioxa[7]helicenes

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posted on 2012-10-19, 00:00 authored by Hans Kelgtermans, Liliana Dobrzańska, Luc Van Meervelt, Wim Dehaen
A series of novel substituted trioxa[7]helicenes have been successfully prepared by a one-pot palladium catalyzed C–H arylation reaction starting from readily prepared dibenzofuran fragments. The dinitro-substituted helicene was analyzed by X-ray crystallography revealing the occurrence of two distinct enantiomers in the asymmetric unit, which forms interesting supramolecular motifs in the crystal, based on weak H-bonding interactions.