(8E,10Z)-Tetradeca-8,10-dienal (1a), sex pheromone of the horse chestnut leafminer (Cameraria ohridella; Lepidoptera, Gracillariidae), and its geometrical isomers (1b-1d) were efficiently synthesized using tetrakis(triphenylphosphine)palladium catalyzed cross-coupling reactions of alk-1-ynes or alkenyl alanes with corresponding vinyl iodides. The stereoisomeric purity of obtained tetradecadienals 1a-1d was higher than 95% (GC). Relative electroantennographic (EAG) activities of the prepared compounds 1a-1d elicited on male antennae supported the previously published identification of the C. ohridella sex pheromone.
(8E,10Z)-十四碳八烯醛(1a),是马栗叶蛾(Cameraria ohridella;鳞翅目,柳小蜂科)的性信息素,其几何异构体(1b-1d)通过使用四(三苯基膦)钯催化的烯烃或烯基铝烷与相应的乙烯基碘化物进行交叉偶联反应进行了高效合成。所得到的十四碳八烯醛1a-1d的立体异构纯度高于95%(气相色谱法)。在雄性触角上引发的所制备化合物1a-1d的相对电子触角(EAG)活性支持了先前发表的对C. ohridella性信息素的鉴定。