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Construction of 3,4-Dihydrocoumarin Derivatives with Adjacent Quaternary and Tertiary Stereocenters: Organocatalytic Asymmetric Michael Addition of 2-Oxochroman-3-carboxylate Esters to trans-β-Nitroolefins

  • Sungkyunkwan University
  • Korea Basic Science Institute

Research output: Contribution to journalArticlepeer-review

Abstract

An asymmetric Michael addition of 2-oxochroman-3-carboxylate esters to trans-β-nitroolefins is described. This strategy can give direct access to dihydrocoumarin derivatives bearing adjacent quaternary and tertiary stereocenters with up to >99% yield, >20:1 dr, and >99% ee. The adduct was further transformed to a spiro-dihydrocoumarin compound in three steps with good yield. (Figure presented.).

Original languageEnglish
Pages (from-to)163-167
Number of pages5
JournalAdvanced Synthesis and Catalysis
Volume359
Issue number1
DOIs
StatePublished - 4 Jan 2017

Keywords

  • 3,4-dihydrocoumarins
  • L-proline
  • Michael addition
  • organocatalysis
  • quaternary

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