A Pd-Catalyzed (6+2) Cycloaddition/Ring-Contraction Relay for Chemodivergent Access to Chiral Spirooxindoles
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Herein, we report a Pd-catalyzed asymmetric (6+2) cycloaddition that directly furnishes indole-fused eight-membered lactones bearing an all-carbon quaternary stereocenter with high efficiency and enantioselectivity. Notably, simple modulation of reaction condi... ...
