Synthesis and Characterization of 3,13- and 2,13-Octadecadienyl Compounds for Identification of the Sex Pheromone Secreted by a Clearwing Moth,<i>Nokona pernix</i>
作者:Hideshi NAKA、Tomotake NAKAZAWA、Mieko SUGIE、Masanobu YAMAMOTO、Yoshiteru HORIE、Ryohei WAKASUGI、Yutaka ARITA、Hajime SUGIE、Koji TSUCHIDA、Tetsu ANDO
DOI:10.1271/bbb.70.508
日期:2006.1
Several geometrical isomers of 3,13- and 2,13-octadecadien-1-ols and their acetates were synthesized starting from 1,8-octanediol or 1,9-nonanediol utilizing acetylene coupling reactions. In addition to commercially available compounds, all geometrical isomers of each dienyl compound were analyzed by NMR and GC-MS to accumulate chemical data for studies of sex pheromones secreted from clearwing moths classified into the family Sesiidae of Lepidoptera. Although acetoxy derivatives of the 3,13- and 2,13-dienes showed almost the same mass spectra, the alcohols were distinguished by comparing the relative intensities of [M−18]+ at m⁄z 248, indicating direct differentiation of the two positional isomers without derivatization. Furthermore, each geometrical isomer eluted from a high-polar GC column with a different retention time. Base on these data, a pheromone gland extract of a sesiid moth, Nokona pernix, was analyzed by GC-EAD and GC-MS, and two EAG-active components were identified, viz., the (3E,13Z)- and (3Z,13Z)-isomers of 3,13-octadecadien-1-ol in a ratio of 9:1. In the field, the synthetic compounds mixed in 9:1 ratio attracted N. pernix males well, while a single component scarcely attracted the males. The number of attracted males peaked in the middle of June, and a small second peak was observed in August.
通过乙炔偶联反应从1,8-辛二醇或1,9-壬二醇出发合成了3,13-和2,13-十八碳二烯-1-醇及其乙酸酯的几种几何异构体。除了商业上可获得的化合物外,每种二烯基化合物的所有几何异构体都通过NMR和GC-MS进行了分析,以积累用于研究从隶属于鳞翅目天蛾科的透翅蛾中分泌的性信息素的化学数据。尽管3,13-和2,13-二烯的乙酸酯衍生物显示出几乎相同的质谱,但通过比较[M−18]+在m/z 248处的相对强度,醇可以被区分开来,这表明可以直接区分这两种位置异构体而不需要衍生化。此外,每种几何异构体从高极性GC柱中流出时具有不同的保留时间。基于这些数据,通过GC-EAD和GC-MS分析了一种天蛾科蛾类Nokona pernix的性信息素腺提取物,并鉴定了两种EAG活性成分,即3,13-十八碳二烯-1-醇的(3E,13Z)-和(3Z,13Z)-异构体,比例为9:1。在田间,以9:1比例混合的合成化合物很好地吸引了N. pernix雄性,而单一成分很少吸引雄性。吸引的雄性数量在六月中旬达到高峰,八月份出现了一个小的高峰。