title: Stereoselective synthesis of trans-fused iridoid lactones and their identification in the parasitoid wasp Alloxysta victrix, Part II: Iridomyrmecins.
abstract: Following our earlier approach to the synthesis of dihydronepetalactones, all eight stereoisomers of trans-fused iridomyrmecins were synthesized starting from the enantiomers of limonene. Combined gas chromatography and mass spectrometry including enantioselective gas chromatography revealed that volatiles released by the endohyperparasitoid wasp Alloxysta victrix contain (4S,4aR,7S,7aR)-iridomyrmecin of 95-97% ee and stereochemically pure (4S,4aS,7R,7aS)-iridomyrmecin as a minor component.
authors.affiliation: Department of Chemistry - Organic Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany.
authors.forename: Robert
authors.initials: R
authors.lastname: Hilgraf
authors.forename: Nicole
authors.initials: N
authors.lastname: Zimmermann
authors.forename: Lutz
authors.initials: L
authors.lastname: Lehmann
authors.forename: Armin
authors.initials: A
authors.lastname: Tröger
authors.forename: Wittko
authors.initials: W
authors.lastname: Francke