In this work, a wide range of bridged eight-membered oxygen heterocycles have been constructed through a novel palladium-catalyzed [4 + 4] cycloaddition of 2-pyrones with 2-alkylidenetrimethylene carbonates. The reaction demonstrated a broad substrate scope and afforded the products in good yields with excellent stereoselectivities.
![Graphical abstract: Palladium-catalyzed [4 + 4] cycloaddition of 2-pyrones with 2-alkylidenetrimethylene carbonates: access to bridged eight-membered oxygen heterocycles](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D4QO00329B&imageInfo.ImageIdentifier.Year=2024)
H. Lin, B. Mao, B. Han, J. Luo, Y. Ge, X. Zhang, C. Wang, H. Guo and C. Yuan, Org. Chem. Front., 2024, 11, 2864 DOI: 10.1039/D4QO00329B
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