Li J, Zhu S, Xu Q, Liu L, Yan S. Brønsted acid mediated intramolecular cyclopropane ring expansion/[4 + 2]-cycloaddition.
Org Biomol Chem 2019;
17:10004-10008. [PMID:
31754676 DOI:
10.1039/c9ob02379h]
[Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A cascade reaction of 3-hydroxy-2-phenylisoindolin-1-one and cyclopropyl ketone has been developed via a BrØnsted acid-promoted ring-opening/intramolecular cross-cycloaddition/[4 + 2]-cycloaddition process. The developed methodology provides straightforward access to pentacyclic isoindolin-1-one derivatives under simple reaction conditions.
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