Chemo-Enzymatic Synthesis of Optically Active γ- and δ-Decalactones and Their Effect on Aphid Probing, Feeding and Settling Behavior
作者:Filip Boratyński、Katarzyna Dancewicz、Marlena Paprocka、Beata Gabryś、Czesław Wawrzeńczyk
DOI:10.1371/journal.pone.0146160
日期:——
The enantiomerically enriched γ- and δ-decalactones (4a and 4b) were prepared from corresponding racemic primary-secondary 1,4- and 1,5-diols (1a and 1b), as products of enzymatic oxidation catalyzed by different alcohol dehydrogenases. The results of biotransformations indicated that the oxidation processes catalyzed by alcohol dehydrogenase (HLADH), both isolated from horse liver and recombinant
对映体富集的γ-和δ-癸内酯(4a和4b)是由相应的外消旋伯仲-仲1,4-和1,5-二醇(1a和1b)制备的,它们是通过不同的醇脱氢酶催化的酶促氧化产物。生物转化的结果表明,从马肝和大肠杆菌中分离得到的乙醇脱氢酶(HLADH)催化的氧化过程具有最高的转化率和中等的对映选择性。开发了一种有用的,环境友好的十氢化内酯(4a和4b)萃取方法,该方法基于使用Deryng装置的加氢蒸馏法。测试了两种外消旋内酯(4a和4b)及其对映异构体富集的异构体对桃蚜的饲料威慑作用。在体内研究了这些化合物对桃蚜的探测,进食和沉降行为的影响。十氢内酯(4a和4b)对蚜虫的威慑活性取决于内酯环的大小和化合物的对映体纯度。δ-癸内酯(4b)似乎对桃蚜无活性,而γ-癸内酯(4a)在侵入期抑制蚜虫的探测。仅(-)-(S)-γ-癸内酯(4a)具有韧皮部的强度和持久性(即持续至少24小时),以韧皮部水平表达。persicae,