Boracyclobutenes and their benzannulated derivatives are a rare class of highly reactive compounds, of which only a few examples have been sporadically obtained by thermal routes. Now, a photochemical strategy provides reliable access to a broad scope of bench-stable boron heterocycles.
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Wessel, L., Frank, R. Bench-stable boracyclobutenes. Nat. Chem. 17, 632–633 (2025). https://doi.org/10.1038/s41557-025-01814-y
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DOI: https://doi.org/10.1038/s41557-025-01814-y