6533b828fe1ef96bd1288df9

RESEARCH PRODUCT

A Bioinspired Approach to Tri-nor-guaianes. Synthesis of (−)-Clavukerin A

Gonzalo BlayB. GarciaEva MolinaJosé R. Pedro

subject

PharmacologyOzonolysisMolecular StructureOrganic ChemistryPharmaceutical ScienceStereoisomerismSesquiterpeneChemical synthesisAnalytical ChemistrySesquiterpenes Guaianechemistry.chemical_compoundComplementary and alternative medicinechemistryDrug DiscoverySide chainMolecular MedicineOrganic chemistryCycloheptanesPolycyclic Aromatic HydrocarbonsEnantiomerSelectivityDeoxygenation

description

A bioinspired approach to tri-nor-guaianes by degradation of the C-7 side chain of related guaia-11-enes is described. In this approach (-)-clavukerin A (1) is obtained by selective ozonolysis-Criegge rearrangement of (+)-1alphaH,7alphaH,10alphaH-guaia-4,11-dien-3-one (4) to afford 7beta-hydroxy and 7beta-acetoxy tri-nor-guaiane derivatives 6 and 7, respectively, which after elimination and deoxygenation give the title compound. The starting guaiadienone is readily obtained from commercially available santonin or (+)-dihydrocarvone.

https://doi.org/10.1021/np060184g