Practical synthesis of the C-ring precursor of paclitaxel from 3-methoxytoluene

J Antibiot (Tokyo). 2016 Apr;69(4):273-9. doi: 10.1038/ja.2016.6. Epub 2016 Feb 10.

Abstract

The practical synthesis of the C-ring precursor of paclitaxel starting from 3-methoxytoluene is described. Lipase-catalyzed kinetic resolution of a substituted cyclohexane-1,2-diol, derived from 3-methoxytoluene in three steps, successfully afforded a desired enantiomer with >99% ee, which was transformed to a cyclohexenone. 1,4-Addition of a vinyl metal species, followed by Mukaiyama aldol reaction with formalin in the presence of a Lewis acid provided the known C-ring precursor of paclitaxel in a 10 g scale.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents, Phytogenic / chemical synthesis*
  • Cyclohexanes / chemistry
  • Formaldehyde / chemistry
  • Lipase / chemistry
  • Paclitaxel / chemical synthesis*
  • Toluene / analogs & derivatives*
  • Toluene / chemical synthesis*

Substances

  • Antineoplastic Agents, Phytogenic
  • Cyclohexanes
  • Formaldehyde
  • Toluene
  • Lipase
  • Paclitaxel
  • 3-methoxytoluene