An Unexpected Lewis Acid-Catalyzed Cascade Reaction of Bicyclo[1.1.0]butanes with Triazinanes to Biscyclobutenyl Amines

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...