An unexpected In(OTf)3-catalyzed cascade reaction of bicyclo[1.1.0]butanes with triazinanes is reported, providing a series of butterfly-shaped biscyclobutenyl amines in good yields. This reaction features simple operation, mild reaction conditions, and broad substrate scope. A rational mechanism involving a key carbocation intermediate is proposed.
![Graphical abstract: An unexpected Lewis acid-catalyzed cascade reaction of bicyclo[1.1.0]butanes with triazinanes toward biscyclobutenyl amines](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D4QO02245A&imageInfo.ImageIdentifier.Year=2025)
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F. Chen, Y. Duan, Y. Guo, Y. Liu, M. Lang, J. Peng and S. Peng, Org. Chem. Front., 2025, Advance Article , DOI: 10.1039/D4QO02245A
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