Ru-catalyzed asymmetric hydrogenation of δ-keto Weinreb amides: enantioselective synthesis of (+)-Centrolobine

Org Biomol Chem. 2016 Mar 7;14(9):2723-30. doi: 10.1039/c5ob02622a.

Abstract

An efficient asymmetric hydrogenation of δ-keto Weinreb amides catalyzed by a Ru-Xyl-SunPhos-Daipen bifunctional catalyst has been achieved. This method afforded a series of enantio-enriched δ-hydroxy Weinreb amides in good yields (up to 93%) and enantioselectivities (up to 99%). This protocol was successfully applied to the synthesis of the key intermediate of (+)-Centrolobine.

MeSH terms

  • Amides / chemistry*
  • Catalysis
  • Hydrogenation
  • Molecular Conformation
  • Organometallic Compounds / chemistry*
  • Pyrans / chemical synthesis*
  • Pyrans / chemistry
  • Ruthenium / chemistry*
  • Stereoisomerism

Substances

  • Amides
  • Organometallic Compounds
  • Pyrans
  • centrolobin
  • Ruthenium