First enantiospecific total synthesis of the antitubercular marine natural product pseudopteroxazole. Revision of assigned stereochemistry

J Am Chem Soc. 2003 Nov 5;125(44):13486-9. doi: 10.1021/ja0378916.

Abstract

A concise, enantiospecific synthesis of pseudopteroxazole (3), which had originally been assigned structure 1, has been accomplished starting from S-(-)-limonene. The known cyclohexanone 5 was converted in five steps to the alpha,beta-enone 8 by a modified Robinson annulation. Transformation of 8 to the orthogonally protected amino phenol 11 was accomplished by a new modification of the Wolff-Semmler rearrangement. The synthesis was completed by cationic cyclization to form 14 diastereoselectively and subsequent introduction of the terminal oxazole subunit.

Publication types

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

MeSH terms

  • Antitubercular Agents / chemical synthesis
  • Cyclization
  • Cyclohexenes
  • Diterpenes / chemical synthesis*
  • Limonene
  • Oxazoles / chemical synthesis*
  • Stereoisomerism
  • Terpenes / chemistry

Substances

  • Antitubercular Agents
  • Cyclohexenes
  • Diterpenes
  • Oxazoles
  • Terpenes
  • pseudopteroxazole
  • Limonene