Visible light-driven dearomative meta-cycloadditions of 2-acetonaphthalenes via triplet energy transfer cascade
Abstract Dearomative cycloadditions (DACs) with ortho- and para-variants have been well documented under visible light-mediated triplet-triplet energy transfer (VLEnT) catalysis. The prospective [3 + 2] or the meta-DACs propelled via VLEnT catalysis remains elusive. Classically, meta-DACs are known...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-03-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-58285-5 |
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| Summary: | Abstract Dearomative cycloadditions (DACs) with ortho- and para-variants have been well documented under visible light-mediated triplet-triplet energy transfer (VLEnT) catalysis. The prospective [3 + 2] or the meta-DACs propelled via VLEnT catalysis remains elusive. Classically, meta-DACs are known under harsher UV irradiations and are symmetry allowed in the excited singlet potential energy surface. Herein, we report formal meta-DACs of 2-acetonaphthalenes propagated via a two-step VLEnT cascade circumventing the attainment of energetically higher singlet excited states. The photosensitizer selectively promotes the [4 + 2] cycloaddition followed by a contra-thermodynamic di-π-methane type skeleton rearrangement cascade. The DFT studies in conjugation with electrochemical, photoluminescence, kinetic, quadratic dependency, and control experiments support the VLEnT cascade. The described protocol delivers highly sp3-rich polycyclic frameworks in high yields with wide functional group tolerance. The inclusion of bioactive molecules and the establishment of a wide array of post-synthetic derivatizations further underscores the adaptability of the methodology for generating complex three-dimensional molecules. |
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| ISSN: | 2041-1723 |