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. 2019 Nov 1;21(21):8652-8656.
doi: 10.1021/acs.orglett.9b03273. Epub 2019 Oct 18.

Four-Fold Alkyne Benzannulation: Synthesis, Properties, and Structure of Pyreno[ a]pyrene-Based Helicene Hybrids

Radha Bam  1 , Wenlong Yang  1 , Giovanna Longhi  2 , Sergio Abbate  2 , Andrea Lucotti  3 , Matteo Tommasini  3 , Roberta Franzini  4 , Claudio Villani  4 , Vincent J Catalano  1 , Marilyn M Olmstead  5 , Wesley A Chalifoux  1
Affiliations

Four-Fold Alkyne Benzannulation: Synthesis, Properties, and Structure of Pyreno[ a]pyrene-Based Helicene Hybrids

Radha Bam et al. Org Lett. .

Abstract

The synthesis of pyreno[a]pyrene-based helicene hybrids was achieved in good yield via a four-fold alkyne benzannulation reaction that was promoted by Brønsted acid. The molecules are configurationally locked, allowing the enantiomers to be separated using chiral HPLC so that their photophysical and chiroptical properties, including circular dichroism and circularly polarized luminescence, could be studied.

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