Abstract
The present work develops a DMAP-catalyzed [3 + 2] cycloaddition of vinyl oxiranes with activated ketone compounds, affording dioxolane derivatives with moderate to excellent yields. This approach represents the first Lewis base (LB)-catalyzed ring-opening reaction of vinyl epoxides, simultaneously providing a rare oxygen-containing active intermediate in this field. The gram-scale preparation and facile derivatization of the cycloadduct highlight the significant synthetic potential of this strategy.
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