title: The total synthesis of coleophomones B, C, and D.
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.
authors.affiliation: Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA. kcn@scripps.edu
authors.forename: K C
authors.initials: KC
authors.lastname: Nicolaou
authors.forename: Tamsyn
authors.initials: T
authors.lastname: Montagnon
authors.forename: Georgios
authors.initials: G
authors.lastname: Vassilikogiannakis
authors.forename: Casey J N
authors.initials: CJ
authors.lastname: Mathison
mesh_terms: D000478:Alkylation; D018360:Crystallography, X-Ray; D003500:Cyclization; D006576:Heterocyclic Compounds, 4 or More Rings / Q000138:chemical synthesis* / Q000737:chemistry; D047028:Macrocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D015394:Molecular Structure
chemical_list: D006576:Heterocyclic Compounds, 4 or More Rings; D047028:Macrocyclic Compounds; C469249:coleophomone B; C469250:coleophomone C