Lactones. 9. Synthesis of Terpenoid LactonesActive Insect Antifeedants
作者:Edyta Paruch、Zbigniew Ciunik、Jan Nawrot、Czesław Wawrzeńczyk
DOI:10.1021/jf991307o
日期:2000.10.1
Claisen rearrangement and iodolactonization, four enantiomeric pairs of gamma-lactones were obtained. The structures of compounds were established by both spectroscopic and crystallographic methods. The lactones were tested for antifeeding activity toward grain storage pests-the granary weevil beetle (Sitophilus granarius L.), the khapra beetle (Trogoderma granarium Ev.), and the confused flour beetle (Tribolium
从(+)-和(-)-紫苏醇开始,经克莱森重排和碘内酯化,获得了四个γ-内酯对映体对。化合物的结构通过光谱学和晶体学方法确定。测试了内酯对谷物储藏害虫-粮象鼻甲虫(Sitophilus granarius L.),khapra甲虫(Trogoderma granarium Ev。)和糊状的面粉甲虫(Tribolium confusum Duv。)的拒食活性。测试结果证明了(1R,4R,6R)-(-)-4-(1-甲基乙烯基)-9-氧杂双环[4.3.0] nonan-8-one(8a)及其对映异构体( 8b)是针对所有上述测试物种的非常活跃的拒食剂。内酯8b也对桃-马铃薯蚜虫(Myzus persicae Sulz。)具有活性。活性取决于化合物手性中心的绝对构型。另外,内酯8a和8b的特征在于令人感兴趣的香料。