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Issue 88, 2018
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Metal-free cycloisomerizations of o-alkynylbiaryls

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We describe a novel and highly efficient metal-free strategy to construct 9,9-disubstituted fluorenes and phenanthrenes via the TfOH-catalyzed cycloisomerizations of o-alkynylbiaryls. Notably, the significant effects of the electronic properties and steric hindrance of the alkyne terminus on the reaction selectivity have been observed.

Graphical abstract: Metal-free cycloisomerizations of o-alkynylbiaryls

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The article was received on 07 Jul 2018, accepted on 11 Oct 2018 and first published on 11 Oct 2018

Article type: Communication
DOI: 10.1039/C8CC05484C
Citation: Chem. Commun., 2018,54, 12455-12458

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    Metal-free cycloisomerizations of o-alkynylbiaryls

    J. Zhang, S. Li, Y. Qiao, C. Peng, X. Wang and J. Chang, Chem. Commun., 2018, 54, 12455
    DOI: 10.1039/C8CC05484C

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