3675-00-1Relevant articles and documents
Identification and synthesis of male-produced sex pheromone components of the stink bugs: Chlorochroa ligata and Chlorochroa uhleri
Ho, Hsiao-Yung,Millar, Jocelyn G.
, p. 2067 - 2095 (2001)
The reproductive behaviors of the stink bugs Chlorochroa ligata and C. uhleri were studied in the laboratory. Adults of both species became sexually mature about 12-14 days after the final molt, and both sexes mated multiple times during their lifetimes. The mean duration of copulation was 54 ± 24 min for virgin bugs and 46 ± 33 min for experienced bugs for C. ligata and 78 ± 55 min for field-collected C. uhleri of unknown mating status. Male C. ligata were found to transfer a significant fraction of their body mass (19%) to females during mating. Sexually mature C. uhleri males produced three sex-specific compounds, methyl (R)-3-(E)-6-2,3-dihydrofarnesoate, methyl (2E,6E)-farnesoate, and methyl (E)-5-2,6,10-trimethyl-5,9-undecadienoate, in a ratio of 100:0.9:0.6. These three compounds were also produced by sexually mature male C. ligata in a ratio of 100:0.5:0.4. Identifications of the compounds were confirmed by synthesis. Production of the male-specific compounds peaked in late afternoon to early evening, coincident with the peak period of reproductive activity. Laboratory and field bioassays demonstrated that female bugs were attracted to odors from live males and to reconstructed blends of the male-specific compounds.
Determination of the regiochemistry of insect epoxide hydrolase catalyzed epoxide hydration of juvenile hormone by 18O-labeling studies
Linderman, Russell J.,Walker, Elizabeth A.,Haney, Carol,Roe, R. Michael
, p. 10845 - 10856 (1995)
The regiochemistry of Trichoplusia ni epoxide hydrolase catalyzed epoxide hydration of insect juvenile hormone (JH) III has been determined by GC/MS studies of 18O-label incorporation. Nucleophilic addition occurs at C10 of the C10,11 epoxide of JH III. The identification of isotopically labeled and unlabeled diol from the enzyme catalyzed hydration reaction in H218O implies that a covalently bound ester intermediate may be involved in the mechanism of the reaction.
Convenient synthesis of deuterium labelled sesquiterpenes
Duhamel, Nina,Martin, Damian,Larcher, Roberto,Fedrizzi, Bruno,Barker, David
supporting information, p. 4496 - 4499 (2016/09/14)
Sesquiterpenes are an important class of molecules, with roles ranging from pollination and signalling to defense mechanisms. Despite their apparent importance, the limited number of commercial standards has hindered their study and precise quantification. Herein, we report the syntheses of fourteen labelled sesquiterpenes with a high level of deuterium incorporation (>95%) for applications in MS-based studies.
Niaviolides, new macrocyclic sesquiterpenes secreted by males of the African butterfly Amauris niavius
Stritzke, Katja,Schulz, Stefan,Boppre, Michael
, p. 1337 - 1342 (2007/10/03)
The abdominal androconial organs ("hairpencils") of the African butterfly Amauris niavius (Danainae) emit a complex scent bouquet consisting of previously described aromatic compounds, terpenoids, fatty acids, and hydrocarbons. This work reports the identification of two major sesquiterpenes, each possessing a unique 13-membered macrolide ring, originating from an α,ω-oxidation pattern of the sesquiterpene backbone. To the best of our knowledge, sesquiterpene macrolides have not been found before in nature. The structure elucidation of the two compounds, which we propose to call niaviolide (3) and epoxyniaviolide (4), by NMR and GC/MS experiments is presented, together with their subsequent synthesis. Finally, the absolute configuration of natural 4 was determined to be (S,S) by stereoselective synthesis and chiral gas chromatography. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
