title: Propionates and acetates of chiral secondary alcohols: novel sex pheromone components produced by a lichen moth Barsine expressa (Arctiidae: Lithosiinae).
abstract: Females of a lichen moth, Barsine expressa (Arctiidae, Lithosiinae), which inhabit Iriomote Island in Japan, were captured by a black-light trap, and the pheromone gland extract was analyzed by gas chromatography (GC) with an electroantennographic (EAG) detector, and by GC coupled with mass spectrometry. The females produced several EAG-active esters, and the mass spectrum of a major component indicated the mixture consists of propionates derived from C(17)-saturated secondary alcohols, which were inseparable on the capillary GC column. In addition to these main components, the pheromone glands included two acetate derivatives of C(17) alcohols, and other propionates of C(16) and C(15) alcohols. The crude extract was treated with K(2)CO(3), and a 1:1 mixture of C(17) alcohols with a C(6)- or C(7)-chain moiety was obtained. The two alcohols were uniformly converted into monodeuterated n-heptadecane by mesylation and succeeding LiAlD(4) reduction. This result revealed a straight-chain structure of the C(17) alcohols with the acyl groups located at the 7- or 8-position. Field tests on Iriomote Island showed that the synthetic esters were behaviorally active. A 1:1 mixture of racemic 7-propioxyheptadecane and 8-propioxyheptadecane, which were prepared from the secondary alcohols synthesized by a Grignard coupling reaction, attracted male moths. Furthermore, propionates of the alcohols synthesized enantioselectively by using a hydrolytic kinetic resolution with Jacobsen's catalyst were evaluated. Only the traps baited with a mixture of the two esters with the same S-configuration significantly attracted B. expressa males. In the Tokyo area, the propionate mixture attracted a closely related species, Barsine aberrans aberrans.
authors.affiliation: Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo, 184-8588, Japan.
authors.forename: Toru
authors.initials: T
authors.lastname: Fujii
authors.forename: Rei
authors.initials: R
authors.lastname: Yamakawa
authors.forename: Yoshie
authors.initials: Y
authors.lastname: Terashima
authors.forename: Shinya
authors.initials: S
authors.lastname: Imura
authors.forename: Keiichi
authors.initials: K
authors.lastname: Ishigaki
authors.forename: Masakatsu
authors.initials: M
authors.lastname: Kinjo
authors.forename: Tetsu
authors.initials: T
authors.lastname: Ando
mesh_terms: D000085:Acetates / Q000032:analysis* / Q000494:pharmacology; D000438:Alcohols / Q000737:chemistry; D000818:Animals; D045424:Complex Mixtures / Q000737:chemistry / Q000494:pharmacology; D005260:Female; D008297:Male; D009036:Moths / Q000502:physiology*; D011422:Propionates / Q000032:analysis* / Q000494:pharmacology; D012724:Sex Attractants / Q000737:chemistry* / Q000494:pharmacology; D012726:Sexual Behavior, Animal / Q000187:drug effects
chemical_list: D000085:Acetates; D000438:Alcohols; D045424:Complex Mixtures; D011422:Propionates; D012724:Sex Attractants