Total Synthesis and Stereochemical Revision of the 2-Formylpyrrole Alkaloid Hemerocallisamine I

J Nat Prod. 2017 Jun 23;80(6):1926-1929. doi: 10.1021/acs.jnatprod.7b00314. Epub 2017 Jun 7.

Abstract

The first total synthesis of the 2-formylpyrrole alkaloid hemerocallisamine I is reported. The convergent synthesis features a key Maillard-type condensation of a complex amine derived from cis-4-hydroxy-l-proline with a dihydropyranone, to directly furnish the 2-formylpyrrole ring system. The absolute configuration of hemerocallisamine I has been revised on the basis of optical rotation data obtained for the synthesized compound.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkaloids / chemical synthesis*
  • Alkaloids / chemistry*
  • Liliaceae / chemistry
  • Molecular Structure
  • Proline / chemistry
  • Pyrroles / chemical synthesis*
  • Pyrroles / chemistry*
  • Stereoisomerism

Substances

  • Alkaloids
  • Pyrroles
  • hemerocallisamine I
  • Proline