相关实验视频

Updated: Jan 9, 2026

Microwave-Assisted Preparation of 1-Aryl-1H-pyrazole-5-amines

Microwave-Assisted Preparation of 1-Aryl-1H-pyrazole-5-amines

Published on: June 23, 2019

功能不良的pyrido[2,3-b]pyrazine衍生物:生物活性和初步机制

Yong Zhang¹, Wenlei Chen¹, Dengyue Liu²

¹State Key Laboratory of Green Pesticide, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, PR China.

Pesticide biochemistry and physiology

|December 1, 2025

概括

新的pyrido[2,3-b]pyrazine衍生物对植物病原体具有强大的抗真菌和抗菌活性. 化合物X2表现出对真菌的卓越疗效,而X3有效抑制了细菌,突出了脚手架.

科学领域:

药用化学医学化学
农业化学品农业化学品农业化学品
有机合成有机合成

背景情况:

新型抗真菌和抗菌剂的开发对于作物保护至关重要.
现有的药物面临的挑战是耐药性和有效性.
化[2,3-b]化支架具有生物活性化合物发现的潜力.

研究的目的:

合成和评估新的pyrido[2,3-b]pyrazine衍生物作为潜在的杀菌剂和杀菌剂.
评估合成化合物对关键植物病原菌和细菌的生物活性.
为了比较新型化合物的疗效与现有的商业药剂.

主要方法:

三种pyrido[2,3-b]pyrazine衍生物的合成.
对五种植物病原菌 (Rhizoctonia solani, Phomopsis sp., Botrytis cinerea, Sclerotinia sclerotiorum, Magnaporthe oryzae) 的生物评估.
对三种植物病原细菌 (Xanthomonas oryzae pv. 奥里兹科拉,Xanthomonas axonopodis pv.v. 它们是什么? 树, 伪造的注射器 pv. 它们是 (actinidiae).
确定EC50值,并与皮拉姆,阿佐克西斯特罗宾,提亚-铜和比斯默提亚进行比较.
对抗真菌机制 (细胞生长抑制,细胞膜损伤,ROS水平) 和抗菌机制 (毒性因子抑制) 的研究.

主要成果:

与皮拉姆和阿佐克西斯特罗宾相比,X2化合物表现出明显优异的抗真菌活性,与测试的真菌相比,EC50值较低.
化合物X2表现出强大的治疗和保护作用,对Botrytis cinerea,优于积极的对照.
化合物X3对测试的病原体表现出强烈的抗菌活性,EC50值高于thiodiazole-copper,相当于bismerthiazol.
化合物X3有效控制了米细菌叶条,并抑制了细菌毒性因素,如外聚糖,生物膜和运动性.
化合物X2的抗真菌作用涉及细胞生长抑制,细胞膜损伤和细胞内ROS增加.

结论:

化[2,3-b]化衍生物,特别是X2和X3,是新抗真菌和抗菌剂的有希望的候选物.
化[2,3-b]化支架是开发新型农业化学品的宝贵平台.
对这些衍生物的进一步研究可能会导致植物疾病管理的有效解决方案.

关键词:

具有抗菌活性,具有抗菌活性.它具有抗真菌活性,具有抗真菌活性.它们的作用机制.化[2,3-b]pyrazine是一种化.

更多相关视频

Functionalized Spirocyclic Heterocycle Synthesis and Cytotoxicity Assay

Functionalized Spirocyclic Heterocycle Synthesis and Cytotoxicity Assay

Published on: February 9, 2021

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach

Published on: June 10, 2021

相关概念视频

Basicity of Heterocyclic Aromatic Amines

Basicity of Heterocyclic Aromatic Amines

Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para...

Structure-Activity Relationships and Drug Design

Structure-Activity Relationships and Drug Design

Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...

Physical Properties of Amines

Physical Properties of Amines

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.

Basicity of Aromatic Amines

Basicity of Aromatic Amines

The basicity of aromatic amines is much weaker than that of aliphatic amines due to the involvement of the lone pair of electrons over the N atom in resonance with the aryl rings. Generally, the electron-donating ability of any substituents on the aryl ring of aromatic amines increases the basicity of the amine by increasing electron density, and hence the availability of lone pair on the nitrogen. On the other hand, electron-withdrawing functional groups on the aryl ring of amines decrease the...

Diazonium Group Substitution: –OH and –H

Diazonium Group Substitution: –OH and –H

Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.