Chirality Transfer and Asymmetric Catalysis: Two Strategies toward the Enantioselective Formal Total Synthesis of (+)-Gelsenicine

Org Lett. 2022 Jul 15;24(27):4971-4976. doi: 10.1021/acs.orglett.2c01974. Epub 2022 Jul 7.

Abstract

Two strategies are described en route to an enantioselective total synthesis of gelsenicine. One approach centers on a chirality transfer cycloisomerization that ultimately fell short. Separately, an asymmetric catalysis route utilizing bisphosphine-gold-catalyzed cycloisomerization was pursued. A catalytic system was identified that provided a synthetic intermediate in our Gelsemium alkaloid syntheses in high enantiopurity and with absolute configuration determined by electronic circular dichroism, thus representing an enantioselective formal total synthesis of (+)-gelsenicine.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Catalysis
  • Indole Alkaloids*
  • Molecular Structure
  • Stereoisomerism

Substances

  • Indole Alkaloids
  • gelsenicine