The selectivity of this tandem reaction (1,2-migration followed by aura-iso-Nazarov cyclization) could be switched by the proper choice of catalyst and reaction conditions allowing the isolation of 2-(inden-3-yl)indenes derived from an aura-Nazarov cyclization. See: Álvarez E, Miguel D, García-García P, Fernández-Rodríguez MA, Rodríguez F, Sanz R.
Beilstein J. Org. Chem. 2011;
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