Total Synthesis of Nortopsentin D via a Late-Stage Pinacol-like Rearrangement

Org Lett. 2021 Jul 16;23(14):5368-5372. doi: 10.1021/acs.orglett.1c01681. Epub 2021 Jun 25.

Abstract

Nortopsentin D is part of a class of bis(indole) alkaloids known for their biological activity, including inhibitory activity in tumoral cells and antifungal activity. Herein we describe the first total synthesis of nortopsentin D, in which amidine and dione undergo a pivotal condensation and subsequent cyclization via a pinacol-like rearrangement. This synthesis represents a unique strategy for the formation of 5,5-disubstituted (4H)-imidazol-4-one containing natural products, many of which have yet to succumb to total synthesis.

Publication types

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

MeSH terms

  • Biological Products / chemical synthesis
  • Glycols / chemistry*
  • Imidazoles / chemical synthesis*
  • Imidazoles / chemistry
  • Indole Alkaloids / chemical synthesis*
  • Indole Alkaloids / chemistry
  • Indoles / chemical synthesis*
  • Indoles / chemistry
  • Molecular Structure

Substances

  • Biological Products
  • Glycols
  • Imidazoles
  • Indole Alkaloids
  • Indoles
  • pinacol
  • topsentin A
  • imidazole