Roy P, Shrestha D, Akhtar MS, Lee YR. Rh-Catalyzed Annulation of Enaminones with Maleimides for Functionalized Aza-spiro α-Tetralones and Benzo[
e]isoindoles via C-H Activation/C═C Bond Cleavage.
Org Lett 2024;
26:142-147. [PMID:
38109110 DOI:
10.1021/acs.orglett.3c03758]
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Abstract
An unprecedented strategy for Rh-catalyzed C-H activation/C═C bond cleavage of enaminones is described for the construction of biologically interesting aza-spiro α-tetralones and benzo[e]isoindoles. This protocol provides diversely functionalized aza-spiro α-tetralones and benzo[e]isoindoles in good yields via a [4 + 2] annulation of the exomaleimides and maleimides. This strategy displays a good substrate scope, outstanding functional group tolerance, and excellent regioselectivity.
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