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Herein, an N-heterocyclic carbene (NHC)-catalyzed radical alkylarylation of bicyclo[1.1.0]butanes (BCBs) for the convenient construction of 3-spirocyclobutyl oxindoles has been developed. This facile protocol features mild reaction conditions and high efficiency, is transition-metal-free, and exhibits broad substrate scope (24 examples, up to 90% yield).
![Graphical abstract: Synthesis of 3-spirocyclobutyl oxindoles via N-heterocyclic carbene-catalyzed radical alkylarylation of bicyclo[1.1.0]butanes](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D6CC01634K&imageInfo.ImageIdentifier.Year=2026)
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X. Li, J. Zhu, Y. Liang, C. Yu, T. Li, C. Yao and K. Zhang, Chem. Commun., 2026, Advance Article , DOI: 10.1039/D6CC01634K
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