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Enantioselective Construction of Spirooxindole-Fused Cyclopentanes

. 2021 Sep 17 ; 86 (18) : 12623-12643. [epub] 20210720

Language English Country United States Media print-electronic

Document type Journal Article, Research Support, Non-U.S. Gov't

The present study reports an asymmetric organocatalytic cascade reaction of oxindole derivates with α,β-unsaturated aldehydes efficiently catalyzed by simple chiral secondary amine. Spirooxindole-fused cyclopentanes were produced in excellent isolated yields (up to 98%) with excellent enantiopurities (up to 99% ee) and moderate to high diastereoselectivities. The synthetic utility of the protocol was exemplified on a set of additional transformations of the corresponding spiro compounds. In addition, a study showing the promising biological activity of selected enantioenriched products was accomplished.

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