Synthesis of (±)-acetylnorloline via stereoselective tethered aminohydroxylation

Org Lett. 2011 Mar 4;13(5):1246-9. doi: 10.1021/ol200155p. Epub 2011 Feb 9.

Abstract

Loline alkaloids exhibit a strained ether-bridged pyrrolizidine skeleton and possess insecticidal and insect antifeedant properties. The synthesis of acetylnorloline, a prototypical member of the alkaloid family, is described. Central to the route is a stereoselective tethered aminohydroxylation (TA) of a homoallylic carbamate. Allylic (A1,3) strain is exploited to enforce diastereofacial selectivity during the aminohydroxylation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkaloids / chemistry
  • Amines / chemistry
  • Epichloe / chemistry
  • Hydroxylation
  • Lolium / microbiology
  • Molecular Structure
  • Neotyphodium / chemistry
  • Pyrrolizidine Alkaloids / chemical synthesis*
  • Pyrrolizidine Alkaloids / chemistry
  • Stereoisomerism

Substances

  • Alkaloids
  • Amines
  • Pyrrolizidine Alkaloids
  • acetylnorloline
  • loline