亚类相应物和对黑马长角的杀虫活性之间的结构-活性关系
1Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea.
Pest management science
|December 10, 2024
概括
莱皮米耶尼油及其成分基烯对黑马长角有强烈的活性,为严重发烧与血栓塞维症综合征 (SFTS) 病毒提供了潜在的新管理策略. 需要进一步的研究来开发有效的配方.
科学领域:
- 昆虫学 昆虫学是一门学科.
- 医学昆虫学 医学昆虫学
- 化学生态化学生态学
背景情况:
- 韩国严重发烧与血小板缺血综合征 (SFTS) 病毒的发病率增加.
- SFTS病毒是由Haemaphysalis longicornis传播的,对人类和动物构成风险.
- 目前尚无针对SFTS的特定抗病毒治疗方法.
研究的目的:
- 研究天然化合物作为潜在的杀虫剂,以对抗长角.
- 为了确定Lepidium meyenii油中具有杀虫性质的活性成分.
- 评估已识别的化合物对H. longicornis.不同生命阶段的疗效.
主要方法:
- 对Lepidium meyenii油及其分类对H. longicornis幼虫,和成人的杀性活性测定.
- 气色谱-质谱 (GC-MS) 用于对L. meyenii油的化学成分分析.
- 确定单个化合物和类似物对H. longicornis的致命剂量50% (LD50) 值.
主要成果:
- 与二甲基多胺相比,Lepidium meyenii油表现出明显更高的杀性活性.
- 乙被确定为L. meyenii油中主要的活性杀性成分.
- 甲,甲和甲对H. longicornis表现出强烈的剂量依赖活性,其中甲是最有效的.
结论:
- 莱皮米耶尼油和特定的烯化合物显示出对管理H. longicornis感染的前景.
- 基亚,基亚和基亚是对H. longicornis.有效的杀虫剂.
- 需要进一步开发配方,以优化这些天然杀虫剂的有效性和安全性.
相关概念视频
Physical Properties of Amines
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Amines with low molecular weight are usually gaseous at room temperature, while those with high molecular weight are liquid or solids in nature. Usually, low molecular weight amines have a rotten fish-like smell. Diamines typically have a pungent smell. For instance, cadaverine and putrescine, depicted in Figure 1, are two molecules responsible for decaying tissue.
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Structures of Carboxylic Acid Derivatives
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Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
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Nitriles to Carboxylic Acids: Hydrolysis
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Nitriles undergo acid-catalyzed hydrolysis or base-catalyzed hydrolysis to form a carboxylic acid. These reactions proceed via an amide intermediate.
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Amines to Amides: Acylation of Amines
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Various carboxylic acid derivatives (such as acid chlorides, esters, and anhydrides) can be used for the acylation of amines to yield amides. The reaction requires two equivalents of amines. The first amine molecule functions as a nucleophile and attacks the carbonyl carbon to produce a tetrahedral intermediate. This is followed by the loss of the leaving group and restoration of the C=O bond.
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
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2° Amines to N-Nitrosamines: Reaction with NaNO2
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Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
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Nitriles to Amines: LiAlH4 Reduction
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Nitriles are reduced to amines in the presence of strong reducing agents like lithium aluminum hydride through a typical nucleophilic acyl substitution. The reaction requires two equivalents of the reducing agent. The reducing agent acts as a source of hydride ions.
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...
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