title: Zingiberenol, (1R,4R,1′S)‑4-(1′,5′-Dimethylhex-4′-enyl)-1-methylcyclohex-2-en-1-ol, identified as the sex pheromone produced by males of the rice stink bug Oebalus poecilus (heteroptera: pentatomidae).
abstract: Bioassays using an olfactometer showed that Oebalus poecilus males produce the sexual pheromone, and the chemical analysis demonstrated that this compound is zingiberenol. Two groups of isomers, each containing four diastereoisomers, (1RS,4RS,1'S)- and (1RS,4RS,1'R)-zingiberenol, were prepared. These diastereoisomers were not separated on a chiral GC column. Therefore, to determine the absolute configuration of the carbon 1, 4, and 1' of zingiberenol produced by males, the following strategies were conducted. The extract containing males volatiles was submitted to dehydration microchemistry to produce zingiberene, in which the isomers are separated by chiral GC analysis, and by comparison with the natural zingiberene from ginger oil, the absolute stereochemistry of the carbons 4 and 1' was determined to be R and S, respectively, and the carbon 1 was determined as R from the (13)C NMR spectra of quercivorol. Finally, the bioassays showed that O. poecilus females responded to racemic mixture and to (1RS,4RS,1'S)-zingiberenol.
authors.affiliation: Embrapa Recursos Genéticos e Biotecnologia , Parque Estação Biológica - W5 Norte, CEP 70770-900, Brasília, DF, Brazil.
authors.forename: Márcio Wandré Morais
authors.initials: MW
authors.lastname: de Oliveira
authors.forename: Miguel
authors.initials: M
authors.lastname: Borges
authors.forename: Carlos Kleber Zago
authors.initials: CK
authors.lastname: Andrade
authors.forename: Raul Alberto
authors.initials: RA
authors.lastname: Laumann
authors.forename: José Alexandre Freitas
authors.initials: JA
authors.lastname: Barrigossi
authors.forename: Maria Carolina
authors.initials: MC
authors.lastname: Blassioli-Moraes
mesh_terms: D000818:Animals; D005260:Female; D020062:Heteroptera / Q000737:chemistry / Q000378:metabolism*; D007536:Isomerism; D008297:Male; D015394:Molecular Structure; D012275:Oryza / Q000469:parasitology*; D010935:Plant Diseases / Q000469:parasitology; D012717:Sesquiterpenes / Q000737:chemistry / Q000378:metabolism*; D012724:Sex Attractants / Q000737:chemistry / Q000378:metabolism*
chemical_list: C000589283:(1RS,4RS,1'S)-zingiberenol; D012717:Sesquiterpenes; D012724:Sex Attractants