Enantioselective Construction of Spirooxindole-Fused Cyclopentanes

J Org Chem. 2021 Sep 17;86(18):12623-12643. doi: 10.1021/acs.joc.1c01116. Epub 2021 Jul 20.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aldehydes
  • Catalysis
  • Cyclopentanes*
  • Spiro Compounds*
  • Stereoisomerism

Substances

  • Aldehydes
  • Cyclopentanes
  • Spiro Compounds