The [2+2] photocycloaddition of two double-bond moieties is arguably the most efficient way to form a four-membered ring, but this route is rarely used to construct azetidine rings. Now, the development of an isoxazoline carboxylate cycloaddition partner offers a general approach to synthesize diverse azetidine products.
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Coote, S. A light touch for complex products. Nat. Chem. 12, 889–890 (2020). https://doi.org/10.1038/s41557-020-0536-y
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DOI: https://doi.org/10.1038/s41557-020-0536-y
