The total synthesis of coleophomones B, C, and D

J Am Chem Soc. 2005 Jun 22;127(24):8872-88. doi: 10.1021/ja0509984.

Abstract

Members of the coleophomone family of natural products all possess several intriguing and challenging architectural features, as well as exhibit unusual biological activity. They, therefore, constitute attractive targets for synthesis. In this Article, we describe the total synthesis of coleophomones B (2), C (3), and D (4). The highly strained and congested 11-membered macrocycle of coleophomones B (2) and C (3) was constructed using an impressive olefin metathesis reaction. Furthermore, both of the requisite geometric isomers of the Delta(16,17) within the macrocycle could be accessed from a common precursor, facilitating a divergence that lent the coleophomone B (2)/C (3) synthesis an unusually high degree of efficiency. The synthesis of coleophomone D (4) confirmed that it exists as a dynamic mixture of isomeric forms with a different aromatic substitution pattern from the other family members.

MeSH terms

  • Alkylation
  • Crystallography, X-Ray
  • Cyclization
  • Heterocyclic Compounds, 4 or More Rings / chemical synthesis*
  • Heterocyclic Compounds, 4 or More Rings / chemistry
  • Macrocyclic Compounds / chemical synthesis
  • Macrocyclic Compounds / chemistry
  • Molecular Structure

Substances

  • Heterocyclic Compounds, 4 or More Rings
  • Macrocyclic Compounds
  • coleophomone B
  • coleophomone C