Straightforward synthesis of (R)-(-)-kjellmanianone

Chemistry. 2004 Feb 20;10(4):1042-5. doi: 10.1002/chem.200305486.

Abstract

A direct route to enantiomerically pure (-)-kjellmanianone is reported. The synthesis involves a cerium-catalyzed alpha-hydroxylation and an enzyme-catalyzed procedure to resolve tertiary alcohols at key stages. The intermediate beta-oxo ester was alpha-hydroxylated to give good yields of racemic kjellmanianone. The resolution of the racemic material was achieved by enzymatic saponification, followed by a chemical decarboxylation sequence to give enantiopure (-)-kjellmanianone with 99 % ee. Bromination then afforded the (-)-bromo derivative, whose X-ray structure provided evidence for the R configuration of (-)-kjellmanianone.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anti-Bacterial Agents / chemical synthesis*
  • Anti-Bacterial Agents / chemistry
  • Bridged-Ring Compounds / chemical synthesis*
  • Bridged-Ring Compounds / chemistry
  • Cyclopentanes / chemical synthesis*
  • Cyclopentanes / chemistry
  • Sargassum / chemistry
  • Stereoisomerism

Substances

  • (R)-(-)-kjellmanianone
  • Anti-Bacterial Agents
  • Bridged-Ring Compounds
  • Cyclopentanes