Recursive Anionic γ'-Spiro-annulation of Cyclic Vinylogous Esters with 2-Vinylbenzoates

Key Points

• The aim is to explore a γ'-selective anionic cascade reaction for spiroannulation involving cyclic vinylogous esters and 2-vinylbenzoates.
• Conducted an anionic cascade reaction between cyclic vinylogous esters and 2-vinylbenzoates.
• Focused on achieving high γ'-selectivity during the reaction process.
• Successfully achieved high γ'-selectivity in the spiroannulation process.
• Cyclic vinylogous esters acted as γ',γ'-dianionic equivalents.
• The transformation shows potential for synthetic applications.