Enantioselective [3 + 2] Cycloaddition of Spirocyclopropyloxindoles with 2-(phthalimido)acrylates: Access to Spirocyclopentaneoxindoles

Chiral spirocyclopentane oxindoles represent privileged scaffolds in bioactive compounds, motivating the development of efficient stereoselective synthetic methods. Traditional [3 + 2] cycloadditions of spirocyclopropyl oxindoles are largely limited to internal...