Background:
Developing the high-efficiency and low-risk small-molecule greenfungicide
is the key to effective control of the plant pathogenic oomycetes. Essential oils play a
very important role in novel fungicide discovery for their unique sources and potential target sites.
Eugenol, a kind of plant essential oil, was mainly isolated from the unopened and dried flower
buds of Syzygium aromaticum of the Myrtaceae family. Due to its unique structural skeleton,
eugenol and its derivatives have exhibited a wide range of biological activities. However, a study
on the synthesis of novel 1-sulfonyloxy/acyloxyeugenol derivatives as fungicidal agents against
Phytophthora capsici has not yet been reported.
Methods:
Twenty-six novel 1-sulfonyloxy/acyloxyeugenol derivatives (3a-p and 5a-j) were
prepared and their structures were well characterized by 1H NMR, HRMS, and m.p. Their
fungicidal activity was evaluated against P. capsici by using the mycelial growth rate method.
Results:
To find novel natural-product-based fungicidal agents to control the plant pathogenic
oomycetes, we herein designed and synthesized two series of novel 1-sulfonyloxy/acyloxyeugenol
derivatives (3a-p and 5a-j) as fungicidal agents against P. capsici Leonian, in vitro. Results of
fungicidal activity revealed that, among all compounds, especially compounds 3a, 3f, and 3n
displayed the most potent anti-oomycete activity against P. capsici with EC50 values of 79.05,
75.05, and 70.80, respectively.
Conclusion:
The results revealed that the anti-oomycete activity of eugenol with the sulfonyloxy
group was higher than that with the acyloxy group. It is suggested that the fungicidal activity of
eugenol can be improved by introducing the sulfonyloxy group. This will pave the way for further
design, structural modification, and development of eugenol derivatives as fungicidal agents.
背景:
开发高效、低风险的小分子绿色杀菌剂是有效控制植物病原真菌的关键。精油因其独特的来源和潜在的靶点,在新型杀菌剂发现中发挥着非常重要的作用。
丁香酚是一种
植物精油,主要从桃
金娘科的丁香属植物的未开放和干燥的花蕾中分离得到。由于其独特的结构骨架,
丁香酚及其衍
生物展现出了广泛的
生物活性。然而,关于合成新型1-磺酰氧基/酰氧基
丁香酚衍
生物作为对辣椒疫霉菌的杀菌剂的研究尚未报道。
方法:
制备了26种新型1-磺酰氧基/酰氧基
丁香酚衍
生物(3a-p和5a-j),并通过1H NMR、HRMS和熔点对其结构进行了良好的表征。使用菌丝生长速率法评估了它们对辣椒疫霉菌的杀菌活性。
结果:
为了寻找控制植物病原真菌的新型
天然产物杀菌剂,我们设计和合成了两系列新型1-磺酰氧基/酰氧基
丁香酚衍
生物(3a-p和5a-j)作为对辣椒疫霉菌的杀菌剂。杀菌活性结果显示,在所有化合物中,特别是化合物3a、3f和3n,对辣椒疫霉菌的抗真菌活性最强,
EC50值分别为79.05、75.05和70.80。
结论:
结果表明,磺酰氧基的
丁香酚的抗真菌活性高于酰氧基。建议通过引入磺酰氧基来提高
丁香酚的杀菌活性。这将为进一步设计、结构修饰和开发
丁香酚衍
生物作为杀菌剂铺平道路。