Iwata T, Hyodo M, Fukami T, Shiota Y, Yoshizawa K, Shindo M. Anthranoxides as Highly Reactive Arynophiles for the Synthesis of Triptycenes.
Chemistry 2020;
26:8506-8510. [PMID:
32432370 DOI:
10.1002/chem.202002065]
[Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 05/19/2020] [Indexed: 12/14/2022]
Abstract
We report herein an efficient method to synthesize triptycenes by the reaction of benzynes and anthranoxides, which are electron-rich and readily prepared from the corresponding anthrones. Using this method, 1,9-syn-substituted triptycenes were regioselectively obtained employing 3-methoxybenzynes. This method was also applied to synthesize pentiptycenes. A DFT study revealed that the cycloaddition of lithium anthranoxide and benzyne proceeds stepwise.
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