Nishii A, Takikawa H, Suzuki K. 2-Bromo-6-(chlorodiisopropylsilyl)phenyl tosylate as an efficient platform for intramolecular benzyne-diene [4 + 2] cycloaddition.
Chem Sci 2019;
10:3840-3845. [PMID:
31015926 PMCID:
PMC6461022 DOI:
10.1039/c8sc05518a]
[Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 02/20/2019] [Indexed: 01/27/2023] Open
Abstract
An intramolecular benzyne–diene [4 + 2] cycloaddition with broad substrate scope has been realized by using a cleavable silicon tether, allowing access to various polycyclic structures.
An intramolecular benzyne–diene [4 + 2] cycloaddition with broad substrate scope has been realized by using a cleavable silicon tether, allowing access to various polycyclic structures. 2-Bromo-6-(chlorodiisopropylsilyl)phenyl tosylate serves as an efficient platform for (1) rapid attachment of various arynophiles to the benzyne precursor via a Si–O bond and (2) facile generation of benzyne via halogen–metal exchange with Ph3MgLi.
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