Syntheses of (-)-cryptocaryolone and (-)-cryptocaryolone diacetate via a diastereoselective oxy-Michael addition and oxocarbenium allylation

J Org Chem. 2012 Aug 17;77(16):6929-36. doi: 10.1021/jo301122b. Epub 2012 Aug 6.

Abstract

The total syntheses of both (-)-cryptocaryolone and (-)-cryptocaryolone diacetate is presented herein. The usage of a diastereoselective oxy-Michael addition/benzylidene acetal formation coupled with a selective axial oxocarbenium allylation allowed for the preparation of the α-C-glycoside moiety present in the bicyclic bridged structure. In addition, the syn-1,3-diol of the linear portion was installed via a Wacker oxidation followed by a subsequent directed reduction of the appropriate homoallylic alcohol precursor.

Publication types

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

MeSH terms

  • Acetals / chemistry*
  • Alcohols / chemistry*
  • Catalysis
  • Glycosides
  • Magnetic Resonance Spectroscopy
  • Molecular Structure
  • Monosaccharides / chemistry*
  • Oxidation-Reduction
  • Pyrones / chemical synthesis*
  • Stereoisomerism

Substances

  • Acetals
  • Alcohols
  • C-glycoside
  • Glycosides
  • Monosaccharides
  • Pyrones
  • cryptocaryolone
  • cryptocaryolone diacetate