DyKAT by DiCat: Stereoconvergent Dienamine-Catalyzed Claisen Rearrangements

J Org Chem. 2022 Aug 5;87(15):10105-10113. doi: 10.1021/acs.joc.2c01079. Epub 2022 Jul 26.

Abstract

This Claisen rearrangement establishes the feasibility of DyKAT of γ-epimeric enals via dienamine formation to afford enantioenriched products. γ-Aryl and -alkyl enals, and exocyclic enals that introduce quaternary centers, are all amenable substrates. Products are readily converted into pyrrolidines or cyclopentenols. Notably, a reactive dienamine intermediate has been isolated from a catalytic reaction, fully characterized, and converted to product upon reexposure to reaction conditions. Product configuration arises from a directing C-H···π interaction in the transition state.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Catalysis
  • Stereoisomerism*