Enantioselective synthesis of (+)-malbrancheamide B

J Org Chem. 2013 Mar 15;78(6):2422-9. doi: 10.1021/jo3026059. Epub 2013 Feb 8.

Abstract

The asymmetric total synthesis of the chlorinated [2.2.2]-diazabicyclic indole alkaloid (+)-malbrancheamide B is reported. Key to the synthesis is a domino reaction sequence that employs an aldol condensation, alkene isomerization, and intramolecular Diels-Alder cycloaddition. Diastereofacial selection between the azadiene stereofaces is enforced with a chiral aminal auxiliary. A formal 7-step (longest linear route) synthesis of (±)-malbrancheamide B is also reported.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aza Compounds / chemistry*
  • Indole Alkaloids / chemical synthesis*
  • Indole Alkaloids / chemistry
  • Molecular Structure
  • Stereoisomerism

Substances

  • Aza Compounds
  • Indole Alkaloids
  • malbrancheamide B