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Xu D, Lin GT, Huang JC, Sun J, Wang W, Liu X, Xu G. Discovery, Optimization, and Biological Evaluation of Novel Pyrazol-5-yl-phenoxybenzamide Derivatives as Potent Succinate Dehydrogenase Inhibitors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:17608-17616. [PMID: 39046798 DOI: 10.1021/acs.jafc.4c02685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
The diphenyl ether molecular pharmacophore has played a significant role in the development of fungicidal compounds. In this study, a variety of pyrazol-5-yl-phenoxybenzamide derivatives were synthesized and evaluated for their potential to act as succinate dehydrogenase inhibitors (SDHIs). The bioassay results indicate certain compounds to display a remarkable and broad-spectrum in their antifungal activities. Notably, compound 12x exhibited significant in vitro activities against Valsa mali, Gaeumannomyces graminis, and Botrytis cinerea, with EC50 values of 0.52, 1.46, and 3.42 mg/L, respectively. These values were lower or comparable to those of Fluxapyroxad (EC50 = 12.5, 1.93, and 8.33 mg/L, respectively). Additionally, compound 12x showed promising antifungal activities against Sclerotinia sclerotiorum (EC50 = 0.82 mg/L) and Rhizoctonia solani (EC50 = 1.86 mg/L), albeit lower than Fluxapyroxad (EC50 = 0.23 and 0.62 mg/L). Further in vivo experiments demonstrated compound 12x to possess effective protective antifungal activities against V. mali and S. sclerotiorum at a concentration of 100 mg/L, with inhibition rates of 66.7 and 89.3%, respectively. In comparison, Fluxapyroxad showed inhibition rates of 29.2 and 96.4% against V. mali and S. sclerotiorum, respectively. Molecular docking analysis revealed that compound 12x interacts with SDH through hydrogen bonding, π-cation, and π-π interactions, providing insights into the probable mechanism of action. Furthermore, compound 12x exhibited greater binding energy and SDH enzyme inhibitory activity than Fluxapyroxad (ΔGcal = -46.8 kcal/mol, IC50 = 1.22 mg/L, compared to ΔGcal = -41.1 kcal/mol, IC50 = 8.32 mg/L). Collectively, our results suggest that compound 12x could serve as a promising fungicidal lead compound for the development of more potent SDHIs for crop protection.
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Affiliation(s)
- Dan Xu
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Guo-Tai Lin
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jia-Chuan Huang
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jian Sun
- Institute of Agricultural Quality Standard and Testing Technology, Jilin Academy of Agricultural Sciences, Changchun, Jilin 130033, China
| | - Wei Wang
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Xili Liu
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Gong Xu
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
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Li M, Kong W, Sun S, He X, Li S. Degradation-Risk-Inspired Optimization of the Antifungal Oxazolinyl Aniline Lead by a Fusion of Triazole with Nicotinamide. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:17599-17607. [PMID: 39046270 DOI: 10.1021/acs.jafc.4c02025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
The discovery of readily available and easily modifiable new models is a crucial and practical solution for agrochemical innovation. Antifungal function-oriented fusion of triazole with the prevalidated lead (R)-LE001 affords a novel framework with a broad and enhanced antifungal spectrum. Characterized by the easy accessibility and adjustability of [1,2,4]triazolo[4,3-a]pyridine, modular fine-tuning provided a set of unprecedented leads (e.g., Z23, Z25, Z26, etc.) with superior antifungal potentials than the positive control boscalid. Candidate Z23 exhibited a more promising antifungal activity against Sclerotinia sclerotiorum, Botrytis cinerea, and Phytophthora capsici with EC50 values of 0.7, 0.6, and 0.5 μM, respectively. This candidate could effectively control boscalid-resistant B. cinerea strains and also exhibit good vivo efficacy in controlling gray mold. Noteworthily, both the SDH-inhibition and the efficiency against Oomycete P. capsici are quite distinct from that of the positive control boscalid. A molecular docking simulation also differentiates Z23 from boscalid. These findings highlight the potential of [1,2,4]triazolo[4,3-a]pyridine amide as a novel antifungal model.
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Affiliation(s)
- Mengyang Li
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Wenlong Kong
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Shengxin Sun
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Xiaodan He
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Shengkun Li
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
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Xu Z, Cheng X, Cui H, Cao L, Song Y, Chang X, Wang D, Lv X. Design, selective synthesis and biological activities evaluation of novel thiazol-2-ylbenzamide and thiazole-2-ylbenzimidoyl chloride derivatives. Bioorg Chem 2024; 147:107333. [PMID: 38599055 DOI: 10.1016/j.bioorg.2024.107333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/22/2024] [Accepted: 04/02/2024] [Indexed: 04/12/2024]
Abstract
To promote the development and exploitation of novel antifungal agents, a series of thiazol-2-ylbenzamide derivatives (3A-3V) and thiazole-2-ylbenzimidoyl chloride derivatives (4A-4V) were designed and selective synthesis. The bioassay results showed that most of the target compounds exhibited excellent in vitro antifungal activities against five plant pathogenic fungi (Valsa mali, Sclerotinia scleotiorum, Botrytis cinerea, Rhizoctonia solani and Trichoderma viride). The antifungal effects of compounds 3B (EC50 = 0.72 mg/L) and 4B (EC50 = 0.65 mg/L) against S. scleotiorum were comparable to succinate dehydrogenase inhibitors (SDHIs) thifluzamide (EC50 = 1.08 mg/L) and boscalid (EC50 = 0.78 mg/L). Especially, compounds 3B (EC50 = 0.87 mg/L) and 4B (EC50 = 1.08 mg/L) showed higher activity against R. solani than boscalid (EC50 = 2.25 mg/L). In vivo experiments in rice leaves revealed that compounds 3B (86.8 %) and 4B (85.3 %) exhibited excellent protective activities against R. solani comparable to thifluzamide (88.5 %). Scanning electron microscopy (SEM) results exhibited that compounds 3B and 4B dramatically disrupted the typical structure and morphology of R. solani mycelium. Molecular docking demonstrated that compounds 3B and 4B had significant interactions with succinate dehydrogenase (SDH). Meanwhile, SDH inhibition assay results further proved their potential as SDHIs. In addition, acute oral toxicity tests on A. mellifera L. showed only low toxicity for compounds 3B and 4B to A. mellifera L. populations. These results suggested that these two series of compounds had merit for further investigation as potential low-risk agricultural SDHI fungicides.
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Affiliation(s)
- Zonghan Xu
- College of Materials and Chemistry & School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Xiang Cheng
- College of Materials and Chemistry & School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Hongyun Cui
- College of Materials and Chemistry & School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Linmin Cao
- College of Materials and Chemistry & School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Yaping Song
- College of Materials and Chemistry & School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Xihao Chang
- College of Materials and Chemistry & School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Dandan Wang
- College of Materials and Chemistry & School of Plant Protection, Anhui Agricultural University, Hefei 230036, China.
| | - Xianhai Lv
- College of Materials and Chemistry & School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Joint Research Center for Food Nutrition and Health of IHM, China.
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Chai JQ, Wang XB, Yue K, Hou ST, Jin F, Liu Y, Tai L, Chen M, Yang CL. Design, Synthesis, Antifungal Activity, and Action Mechanism of Pyrazole-4-carboxamide Derivatives Containing Oxime Ether Active Fragment As Succinate Dehydrogenase Inhibitors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:11308-11320. [PMID: 38720452 DOI: 10.1021/acs.jafc.3c07880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
The dearomatization at the hydrophobic tail of the boscalid was carried out to construct a series of novel pyrazole-4-carboxamide derivatives containing an oxime ether fragment. By using fungicide-likeness analyses and virtual screening, 24 target compounds with theoretical strong inhibitory effects against fungal succinate dehydrogenase (SDH) were designed and synthesized. Antifungal bioassays showed that the target compound E1 could selectively inhibit the in vitro growth of R. solani, with the EC50 value of 1.1 μg/mL that was superior to that of the agricultural fungicide boscalid (2.2 μg/mL). The observations by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) demonstrated that E1 could reduce mycelial density and significantly increase the mitochondrial number in mycelia cytoplasm, which was similar to the phenomenon treated with boscalid. Enzyme activity assay showed that the E1 had the significant inhibitory effect against the SDH from R. solani, with the IC50 value of 3.3 μM that was superior to that of boscalid (7.9 μM). The mode of action of the target compound E1 with SDH was further analyzed by molecular docking and molecular dynamics simulation studies. Among them, the number of hydrogen bonds was significantly more in the SDH-E1 complex than that in the SDH-boscalid complex. This research on the dearomatization strategy of the benzene ring for constructing pyrazole-4-carboxamides containing an oxime ether fragment provides a unique thought to design new antifungal drugs targeting SDH.
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Affiliation(s)
- Jian-Qi Chai
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiao-Bin Wang
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
- College of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China
| | - Kai Yue
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Shuai-Tao Hou
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Fei Jin
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Yv Liu
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Lang Tai
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Min Chen
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Chun-Long Yang
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
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Zhang L, Huang Y, Duan X, Si H, Luo H, Chen S, Liu L, He H, Wang Z, Liao S. Antifungal Activity and Mechanism of Camphor Derivatives against Rhizoctonia solani: A Promising Alternative Antifungal Agent for Rice Sheath Blight. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:11415-11428. [PMID: 38727515 DOI: 10.1021/acs.jafc.4c02865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Rice sheath blight, caused by the fungus Rhizoctonia solani, poses a significant threat to rice cultivation globally. This study aimed to investigate the potential mechanisms of action of camphor derivatives against R. solani. Compound 4o exhibited superior fungicidal activities in vitro (EC50 = 6.16 mg/L), and in vivo curative effects (77.5%) at 500 mg/L were significantly (P < 0.01) higher than the positive control validamycin·bacillus (66.1%). Additionally, compound 4o exhibited low cytotoxicity and acute oral toxicity for adult worker honeybees of Apis mellifera L. Mechanistically, compound 4o disrupted mycelial morphology and microstructure, increased cell membrane permeability, and inhibited both PDH and SDH enzyme activities. Molecular docking and molecular dynamics analyses indicated a tight interaction of compound 4o with PDH and SDH active sites. In summary, compound 4o exhibited substantial antifungal efficacy against R. solani, serving as a promising lead compound for further optimization of antifungal agents.
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Affiliation(s)
- Li Zhang
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
- College of Agronomy, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Super Rice Engineering Technology Research Center, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yizhong Huang
- College of Life Sciences, Nanchang Normal University, Nanchang 330032, China
| | | | - Hongyan Si
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
| | - Hai Luo
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
| | - Shangxing Chen
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
| | | | - Haohua He
- College of Agronomy, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Super Rice Engineering Technology Research Center, Jiangxi Agricultural University, Nanchang 330045, China
| | - Zongde Wang
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
| | - Shengliang Liao
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
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6
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Xie Q, Zhang S, Zhang Y, Zhang B, Wan F, Li Y, Jiang L. Synthesis, fungicidal activity and molecular docking of novel pyrazole-carboxamides bearing a branched alkyl ether moiety. Bioorg Med Chem Lett 2024; 108:129813. [PMID: 38788964 DOI: 10.1016/j.bmcl.2024.129813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 05/17/2024] [Accepted: 05/21/2024] [Indexed: 05/26/2024]
Abstract
Succinate dehydrogenase inhibitors are essential fungicides used in agriculture. To explore new pyrazole-carboxamides with high fungicidal activity, a series of N-substitutedphenyl-3-di/trifluoromethyl-1-methyl-1H-pyrazole-4-carboxamides bearing a branched alkyl ether moiety were designed and synthesized. The in vitro bioassay indicated that some target compounds displayed appreciable fungicidal activity. For example, compounds 5d and 5e showed high efficacy against S. sclerotiorum with EC50 values of 3.26 and 1.52 μg/mL respectively, and also exhibited excellent efficacy against R. solani with EC50 values of 0.27 and 0.06 μg/mL respectively, which were comparable or superior to penflufen. The further in vivo bioassay on cucumber leaves demonstrated that 5e provided strong protective activity of 94.3 % against S. sclerotiorum at 100 μg/mL, comparable to penflufen (99.1 %). Cytotoxicity assessment against human renal cell lines (239A cell) revealed that 5e had low cytotoxicity within the median effective concentrations. Docking study of 5e with succinate dehydrogenase illustrated that R-5e formed one hydrogen bond and two π-π stacking interactions with amino acid residues of target enzyme, while S-5e formed only one π-π stacking interaction with amino acid residue. This study provides a valuable reference for the design of new succinate dehydrogenase inhibitor.
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Affiliation(s)
- Qingyang Xie
- College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, China
| | - Shuai Zhang
- College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, China
| | - Yuanhong Zhang
- College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, China
| | - Bowen Zhang
- College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, China
| | - Fuxian Wan
- College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, China
| | - Ying Li
- College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, China
| | - Lin Jiang
- College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, China
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He Z, Guan MM, Xiong LT, Li X, Zeng Y, Deng X, Herron AN, Cui ZN. Discovery of novel amide derivatives as potent quorum sensing inhibitors of Pseudomonas aeruginosa. Eur J Med Chem 2024; 271:116410. [PMID: 38615409 DOI: 10.1016/j.ejmech.2024.116410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/07/2024] [Accepted: 04/10/2024] [Indexed: 04/16/2024]
Abstract
With the increasing reports of antibiotic resistance in this species, Pseudomonas aeruginosa is a common human pathogen with important implications for public health. Bacterial quorum sensing (QS) systems are potentially broad and versatile targets for developing new antimicrobial compounds. While previous reports have demonstrated that certain amide compounds can inhibit bacterial growth, there are few reports on the specific inhibitory effects of these compounds on bacterial quorum sensing systems. In this study, thirty-one amide derivatives were synthesized. The results of the biological activity assessment indicated that A9 and B6 could significantly inhibit the expression of lasB, rhlA, and pqsA, effectively reducing several virulence factors regulated by the QS systems of PAO1. Additionally, compound A9 attenuated the pathogenicity of PAO1 to Galleria mellonella larvae. Meanwhile, RT-qPCR, SPR, and molecular docking studies were conducted to explore the mechanism of these compounds, which suggests that compound A9 inhibited the QS systems by binding with LasR and PqsR, especially PqsR. In conclusion, amide derivatives A9 and B6 exhibit promising potential for further development as novel QS inhibitors in P. aeruginosa.
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Affiliation(s)
- Zhe He
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Ming-Ming Guan
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Lan-Tu Xiong
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Xuan Li
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Yan Zeng
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Xile Deng
- Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China
| | | | - Zi-Ning Cui
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China.
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Yan Y, Bao A, Wang Y, Xie X, Wang D, Deng Z, Wang X, Cheng W, Li W, Zhang X, Tang X. Design, Synthesis, Antifungal Activity, and Molecular Docking Studies of Novel Chiral Isoxazoline-Benzofuran-Sulfonamide Derivatives. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38619015 DOI: 10.1021/acs.jafc.3c05730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
Succinate dehydrogenase (SDH) is one of the most important molecular targets for the development of novel fungicides. With the emerging problem of resistance in plant fungal pathogens, novel compounds with high fungicidal activity need to be developed, but the study of chiral pesticides for the inhibition of highly destructive plant pathogens has been rarely reported in recent years. Therefore, a series of novel chiral isoxazoline-benzofuran-sulfonamide derivatives were designed to investigate potential novel antifungal molecules. The chiral target compound 3a was cultured as a single crystal and confirmed using X-ray diffraction. All the target compounds were tested for antifungal activity, and compounds 3c, 3i, 3s, and 3r were found to have significant antifungal effects against S. sclerotiorum with EC50 values of 0.42 mg/L, 0.33 mg/L, 0.37 mg/L, and 0.40 mg/L, respectively, which were superior to the commercial fungicide fluopyram (EC50 = 0.47 mg/L). The IC50 value of compound 3i against the SDH of S. sclerotiorum was 0.63 mg/mL, which was further demonstrated by enzyme activity assays. Scanning electron microscopy showed that 3i had a significant inhibitory effect on S. sclerotiorum. In addition, the fluorescence quenching analysis assay indicated that compound 3i had a similar effect with the positive control fluopyram. Molecular docking exhibited that target compounds with chiral configuration had better affinity than racemic configuration, and 3i possessed stronger action than fluopyram, which was in keeping with the in vitro test results. These results would provide a basis and reference for the development of novel chiral fungicides.
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Affiliation(s)
- Yingkun Yan
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, PR China
| | - Ailing Bao
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, PR China
| | - Yunfan Wang
- Chinese Academy of Inspection and Quarantine Greater Bay Area, Zhongshan 528437, China
| | - Xiansong Xie
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, PR China
| | - Deyuan Wang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, PR China
| | - Ziquan Deng
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, PR China
| | - Xuesong Wang
- Chinese Academy of Inspection and Quarantine Greater Bay Area, Zhongshan 528437, China
| | - Wei Cheng
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, People's Republic of China
| | - Weiyi Li
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, PR China
| | - Xiaomei Zhang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, PR China
| | - Xiaorong Tang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, PR China
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Hu H, Liu Y, Li J, Zhang C, Gao C, Sun C, Du Y, Hu B. Phenolylazoindole scaffold for facilely synthesized and bis-functional photoswitches combining controllable fluorescence and antifungal properties using theoretical methods. Org Biomol Chem 2024; 22:1225-1233. [PMID: 38231009 DOI: 10.1039/d3ob01751f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Functionalization is a major challenge for the application of photoswitches. With the aim to develop novel bis-functional azo photoswitches with stationary photophysical properties, a series of phenolylazoindole derivatives were designed, synthesized, and characterized via NMR spectroscopy studies and high-resolution mass spectrometry (HRMS). Herein, UV/Vis and 1H NMR spectra revealed that the photostationary state (PSS) proportions for PSScis and PSStrans were 76-80% and 68-81%, respectively. Furthermore, the thermal half-lives (t1/2) of compounds A2-A4 and B2 ranged from 0.9 to 5.3 h, affected by the diverse substituents at the R1 and R2 positions. The results indicated that azo photoswitches based on the phenolylazoindole scaffold had stationary photophysical properties and wouldn't be excessively affected by modifying the functional groups. Compounds A4 and B2, which were modified with an aryl group, also exhibited fluorescence emission properties (the quantum yields of A4 and B2 were 2.32% and 13.34%) through the modification of the flexible conjugated structure (benzene) at the R2 position. Significantly, compound C1 was obtained via modification with a pharmacophore in order to acquire antifungal activities against three plant fungi, Rhizoctonia solani (R. solani), Botrytis cinerea (B. cinerea), and Fusarium graminearum (F. graminearum). Strikingly, the inhibitory activity of the cis-isomer of compound C1towards R. solani (53.3%) was significantly better than that of the trans-isomer (34.2%) at 50 μg mL-1. In order to further reveal the antifungal mechanism, molecular docking simulations demonstrated that compound C1 effectively integrates into the cavity of succinate dehydrogenase (SDH); the optically controlled cis-isomer showed a lower binding energy with SDH than that of the trans-isomer. This research confirmed that phenolylazoindole photoswitches can be appropriately applied as molecular regulatory devices and functional photoswitch molecules via bis-functionalization.
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Affiliation(s)
- Haoran Hu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
| | - Yu Liu
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Junqi Li
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
| | - Chong Zhang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
| | - Chao Gao
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
| | - Chengguo Sun
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
| | - Yang Du
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
| | - Bingcheng Hu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
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10
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Li K, Hong S, Yu Z, Hong Z, Sun Y, Cheng J, Tang L, Wang Y, Qi X, Fan Z. Computation-Directed Molecular Design, Synthesis, and Fungicidal Activity of Succinate Dehydrogenase Inhibitors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:19372-19384. [PMID: 38049388 DOI: 10.1021/acs.jafc.3c05232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
Succinate dehydrogenase inhibitors (SDHIs) are a class of fungicides targeting the pathogenic fungi mitochondrial SDH. Here, molecular docking, three-dimensional quantitative structure-activity relationship (3D-QSAR), and molecular dynamics (MD) simulations were used to guide SDHI innovation. Molecular docking was performed to explore the binding modes of SDH and its inhibitors. 3D-QSAR models were carried out on 33 compounds with activity against Rhizoctonia cerealis (R. cerealis); their structure-activity relationships were analyzed using comparative molecular field analysis and comparative molecular similarity indices analysis. MD simulations were used to assess the stability of the complexes under physiological conditions, and the results were consistent with molecular docking. Binding free energy was calculated through the molecular mechanics generalized born surface area method, and the binding free energy was decomposed. The results are consistent with the activity of bioassay and indicate that van der Waals and lipophilic interactions contribute the most in the molecular binding process. Afterward, we designed and synthesized 12 compounds under the guidance of the above-mentioned analyses, bioassay found that F9 was active against R. cerealis with the EC50 value of 9.43 μg/mL, and F4, F5, and F9 were active against Botrytis cinerea with an EC50 values of 5.80, 3.17, and 1.63 μg/mL, respectively. They all showed good activity between positive controls of pydiflumetofen and thifluzamide. Our study provides new considerations for effective SDHIs discovery.
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Affiliation(s)
- Kun Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Shuang Hong
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zhenwu Yu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zeyu Hong
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Yaru Sun
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Jiagao Cheng
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Liangfu Tang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Yong Wang
- Institute of Germplasm Resources and Biotechnology, Tianjin Academy of Agricultural Sciences, Tianjin 300112, P. R. China
| | - Xin Qi
- Institute of Germplasm Resources and Biotechnology, Tianjin Academy of Agricultural Sciences, Tianjin 300112, P. R. China
| | - Zhijin Fan
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
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11
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Qiu Y, Meng Y, Lian W, Jian S, Du Y, Wang M, Yang Y, Liang X, Zhang Y. Polymorphisms at amino acid positions 85 and 86 in succinate dehydrogenase subunit C of Colletotrichum siamense: Implications for fitness and intrinsic sensitivity to SDHI fungicides. Fungal Genet Biol 2023; 169:103844. [PMID: 37989450 DOI: 10.1016/j.fgb.2023.103844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 11/23/2023]
Abstract
Among succinate dehydrogenase inhibiter (SDHI) fungicides, penthiopyrad and benzovindiflupyr particularly inhibit Colletotrichum. Studying SDH amino acid polymorphism in Colletotrichum, along with its fungicide binding sites, is key to understanding their mechanisms of action. This study explores the SDH amino acid polymorphisms in Colletotrichum siamense strains from rubber trees in China and their interaction with SDHI fungicides, specifically penthiopyrad and benzovindiflupyr. Sequencing revealed most polymorphisms were in the SDHC subunit, particularly at positions 85 and 86, which are key to penthiopyrad resistance. Among 33 isolates, 33.3 % exhibited a substitution at position 85, and 9 % at position 86. A strain with W85L and T86N substitutions in SDHC showed reduced SDH activity, ATP content, mycelial growth, and virulence, and decreased sensitivity to penthiopyrad but not benzovindiflupyr. Molecular docking with Alphafold2 modeling suggested distinct binding modes of the two fungicides to C. siamense SDH. These findings underscore the importance of SDHC polymorphisms in C. siamense's fitness and sensitivity to SDHIs, enhancing our understanding of pathogen-SDHI interactions and aiding the development of novel SDHI fungicides.
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Affiliation(s)
- Yurong Qiu
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Yaling Meng
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Wenxu Lian
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Shasha Jian
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Yannan Du
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Meng Wang
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Ye Yang
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Xiaoyu Liang
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China.
| | - Yu Zhang
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China.
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Zhou SM, Wang ZY, Zhu XH, Wu QY, Yang GF. Synthesis and Insecticidal Activity Study of Azidopyridryl Containing Dichlorolpropene Ether Derivatives. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:18205-18211. [PMID: 37421343 DOI: 10.1021/acs.jafc.3c02251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2023]
Abstract
Pyridalyl, as a novel insecticide with an unknown mode of action, has shown excellent control efficacy against lepidopterous larvae and thrips. Previous modifications of this compound have mostly focused on the pyridine moiety, with limited information available about modifications to other parts of pyridalyl. In this paper, we report the synthesis and insecticidal activity of a series of azidopyridryl-containing dichlorolpropene ether derivatives, based on modifications to the middle alkyl chain of pyridalyl. Screening results for insecticidal activity indicate that our synthesized compounds show moderate to high activities at the tested concentrations against P. xylostella. Particularly, compound III-10 exhibits a LC50 value of 0.831 mg L-1, compared to the LC50 value of pyridalyl at 2.021 mg L-1. Furthermore, compound III-10 also displays a relatively broad insecticidal spectrum against Lepidoptera pests M. separata, C. suppressalis, O. nubilalis, and C. medinalis. Finally, in field trials, III-10 demonstrates better control efficiency against Chilo suppressalis compared to pyridalyl. Overall, our findings suggest that the modification of the middle alkyl chain of pyridalyl may be a promising approach for developing insecticides with improved efficacy.
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Affiliation(s)
- Shao-Meng Zhou
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Zhen-Yu Wang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Xiao-Hui Zhu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Qiong-You Wu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Guang-Fu Yang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
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Alkahtani HM, Almehizia AA, Al-Omar MA, Obaidullah AJ, Zen AA, Hassan AS, Aboulthana WM. In Vitro Evaluation and Bioinformatics Analysis of Schiff Bases Bearing Pyrazole Scaffold as Bioactive Agents: Antioxidant, Anti-Diabetic, Anti-Alzheimer, and Anti-Arthritic. Molecules 2023; 28:7125. [PMID: 37894604 PMCID: PMC10609138 DOI: 10.3390/molecules28207125] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/27/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
In continuation of our research programs for the discovery, production, and development of the pharmacological activities of molecules for various disease treatments, Schiff bases and pyrazole scaffold have a broad spectrum of activities in biological applications. In this context, this manuscript aims to evaluate and study Schiff base-pyrazole molecules as a new class of antioxidant (total antioxidant capacity, iron-reducing power, scavenging activity against DPPH, and ABTS radicals), anti-diabetic (α-amylase% inhibition), anti-Alzheimer's (acetylcholinesterase% inhibition), and anti-arthritic (protein denaturation% and proteinase enzyme% inhibitions) therapeutics. Therefore, the Schiff bases bearing pyrazole scaffold (22a, b and 23a, b) were designed and synthesized for evaluation of their antioxidant, anti-diabetic, anti-Alzheimer's, and anti-arthritic properties. The results for compound 22b demonstrated significant antioxidant, anti-diabetic (α-amylase% inhibition), and anti-Alzheimer's (ACE%) activities, while compound 23a demonstrated significant anti-arthritic activity. Prediction of in silico bioinformatics analysis (physicochemical properties, bioavailability radar, drug-likeness, and medicinal chemistry) of the target derivatives (22a, b and 23a, b) was performed. The molecular lipophilicity potential (MLP) of the derivatives 22a, b and 23a, b was measured to determine which parts of the surface are hydrophobic and which are hydrophilic. In addition, the molecular polar surface area (PSA) was measured to determine the polar surface area and the non-polar surface area of the derivatives 22a, b and 23a, b. This study could be useful to help pharmaceutical researchers discover a new series of potent agents that may act as an antioxidant, anti-diabetic, anti-Alzheimer, and anti-arthritic.
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Affiliation(s)
- Hamad M. Alkahtani
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia; (H.M.A.); (A.A.A.); (M.A.A.-O.); (A.J.O.)
| | - Abdulrahman A. Almehizia
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia; (H.M.A.); (A.A.A.); (M.A.A.-O.); (A.J.O.)
| | - Mohamed A. Al-Omar
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia; (H.M.A.); (A.A.A.); (M.A.A.-O.); (A.J.O.)
| | - Ahmad J. Obaidullah
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia; (H.M.A.); (A.A.A.); (M.A.A.-O.); (A.J.O.)
| | - Amer A. Zen
- Chemistry & Forensics Department, Clifton Campus, Nottingham Trent University, Nottingham Ng11 8NS, UK;
| | - Ashraf S. Hassan
- Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo 12622, Egypt
| | - Wael M. Aboulthana
- Biochemistry Department, Biotechnology Research Institute, National Research Centre, Cairo 12622, Egypt;
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Wang J, Lu T, Xiao T, Cheng W, Jiang W, Yan Y, Tang X. Novel quinolin-2(1H)-one analogues as potential fungicides targeting succinate dehydrogenase: design, synthesis, inhibitory evaluation and molecular modeling. PEST MANAGEMENT SCIENCE 2023; 79:3425-3438. [PMID: 36562216 DOI: 10.1002/ps.7332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 11/23/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Succinate dehydrogenase is an important target of fungicides. Succinate dehydrogenase inhibitors (SDHIs) have widely been used to combat destructive plant pathogenic fungi because they possess efficient and broad-spectrum antifungal activities and as well as unique mode of action. The research and development of novel SDHIs have been ongoing. RESULTS Thirty-six novel quinolin-2(1H)-one derivatives were designed, synthesized and characterized. The single crystal structure of compound 3c was determined through the X-ray diffraction of single crystals. The bioassay results displayed that most compounds had good antifungal activities at 16 μg mL-1 against Rhizoctonia cerealis, Erysiphe graminis, Botrytis cinerea, Penicillium italicum and Phytophthora infestans. Compounds 6o, 6p and 6r had better antifungal activities than the commercialized fungicide pyraziflumid against Botrytis cinerea. Their half maximal effective concentration (EC50 ) values were 0.398, 0.513, 0.205 and 0.706 μg mL-1 , respectively. Moreover, the inhibiting activities of the bioactive compounds were tested against succinate dehydrogenase. The results indicated that they possessed outstanding activities. Compounds 6o, 6p and 6r also exhibited better inhibiting activities than pyraziflumid against succinate dehydrogenase. Their half maximal inhibitory concentration (IC50 ) values were 0.450, 0.672, 0.232 and 0.858 μg mL-1 , respectively. The results of molecular dynamic (MD) simulations indicated that compound 6r displayed stronger affinity to succinate dehydrogenase than pyraziflumid. CONCLUSION The results of the present study displayed that quinolin-2(1H)-one derivative could be one scaffold of potential SDHIs and will provide some valuable information for the research and development of new SDHIs. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Jingwen Wang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu, P. R. China
| | - Tong Lu
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu, P. R. China
| | - Tingting Xiao
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu, P. R. China
| | - Wei Cheng
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu, P. R. China
| | - Wenjing Jiang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu, P. R. China
| | - Yingkun Yan
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu, P. R. China
| | - Xiaorong Tang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu, P. R. China
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Chai JQ, Mei YD, Tai L, Wang XB, Chen M, Kong XY, Lu AM, Li GH, Yang CL. Potential Succinate Dehydrogenase Inhibitors Bearing a Novel Pyrazole-4-sulfonohydrazide Scaffold: Molecular Design, Antifungal Evaluation, and Action Mechanism. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37294885 DOI: 10.1021/acs.jafc.3c00126] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Aiming to develop novel antifungal agents with a distinctive molecular scaffold targeting succinate dehydrogenase (SDH), 24 N'-phenyl-1H-pyrazole-4-sulfonohydrazide derivatives were first devised, synthesized, and verified by 1H NMR, 13C NMR, high-resolution mass spectrometry (HRMS), and single-crystal X-ray diffraction analysis. The bioassays revealed that the target compounds possessed highly efficient and broad-spectrum antifungal activities against four tested plant pathogenic fungi Rhizoctonia solani (R. solani), Botrytis cinerea, Fusarium graminearum, and Alternaria sonali. Strikingly, compound B6 was assessed as the selective inhibitor against R. solani, with an in vitro EC50 value (0.23 μg/mL) that was similar to that of thifluzamide (0.20 μg/mL). The in vivo preventative effect of compound B6 (75.76%) at 200 μg/mL against R. solani was roughly comparable to thifluzamide (84.31%) under the same conditions. The exploration of morphological observations indicated that compound B6 could strongly damage the mycelium morphology, obviously increase the permeability of the cell membrane, and dramatically increase the number of mitochondria. Compound B6 also significantly inhibited SDH enzyme activity with an IC50 value of 0.28 μg/mL, and its fluorescence quenching dynamic curves were similar to that of thifluzamide. Molecular docking and molecular dynamics simulations demonstrated that compound B6 could strongly interact with similar residues around the SDH active pocket as thifluzamide. The present study revealed that the novel N'-phenyl-1H-pyrazole pyrazole-4-sulfonohydrazide derivatives are worthy of being further investigated as the promising replacements of traditional carboxamide derivatives targeting SDH of fungi.
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Affiliation(s)
- Jian-Qi Chai
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Yu-Dong Mei
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Nanjing Zhuoran Inspection Limited Corporation, Nanjing 210095, China
| | - Lang Tai
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiao-Bin Wang
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
- College of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China
| | - Min Chen
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiang-Yi Kong
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Ai-Min Lu
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Guo-Hua Li
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Chun-Long Yang
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory of Pesticide Science, Nanjing Agricultural University, Nanjing 210095, China
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Wang J, Liu H, Jiang J, Liu X, Zhou T, Li JQ, Xiao Y, Qin Z. Discovery of triphenylphosphonium (TPP)-conjugated N-(1,1'-biphenyl)-2-yl aliphatic amides as excellent fungicidal candidates. PEST MANAGEMENT SCIENCE 2023. [PMID: 36961097 DOI: 10.1002/ps.7470] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/07/2023] [Accepted: 03/24/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Succinate dehydrogenase inhibitors (SDHIs) are the fastest growing agricultural fungicides at present, but their rapidly growing resistance is a serious problem for their application. Previously, we screened out a fungicidal lead compound CBUA-TPP (1) through triphenylphosphonium (TPP)-driven mitochondrial-targeting strategy. The targeting led to the rapid accumulation of 1 in mitochondria and the saturation inhibition of complex II in a short time, resulting in electron leakage and the explosion of reactive oxygen species (ROS). However, the contribution of biphenyl-2-amines to the activity of these compounds and their structure-activity relationship are still unknown. RESULTS Two series of CBUA-TPP (1) analogues (series 2 and 3) were designed and synthesized. The bioassay results indicated that series 2 compounds generally showed much higher fungicidal activities than series 3, suggesting the crucial contribution of the biarylamine module in these targeted molecules and the pyridinyl substitution of phenyl is unfavorable to their activities. Interestingly, these two series of compounds displayed almost opposite substituent effects. Several compounds showed excellent fungicidal activities in vitro, among which compound 2-1 exhibited excellent field control efficacy on potato late blight. CONCLUSION By optimizing the lead compound, the contribution of biarylamine in CBUA-TPP (1) analogs to the fungicidal activity is clarified. Several compounds, represented by 2-1, have great potential as fungicide candidates. They exhibit high and broad-spectrum fungicidal activities and are highly effective against common pathogenic fungi infecting vegetables and fruits both in vitro and field control. It not only provided a new choice for controlling these diseases, but its low resistance tendency also provided a better scheme for resistance management. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Jiayao Wang
- Department of Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Huihui Liu
- Department of Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Jiazhen Jiang
- Department of Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Xuelian Liu
- Department of Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Tianyou Zhou
- Department of Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Jia-Qi Li
- Department of Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Yumei Xiao
- Department of Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Zhaohai Qin
- Department of Chemistry, College of Science, China Agricultural University, Beijing, China
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17
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Jiang W, Zhang T, Wang J, Cheng W, Lu T, Yan Y, Tang X. Design, Synthesis, Inhibitory Activity, and Molecular Modeling of Novel Pyrazole-Furan/Thiophene Carboxamide Hybrids as Potential Fungicides Targeting Succinate Dehydrogenase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:729-738. [PMID: 36562616 DOI: 10.1021/acs.jafc.2c05054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
To discover new fungicides targeting succinate dehydrogenase (SDH), 36 new furan/thiophene carboxamides containing 4,5-dihydropyrazole rings were designed, synthesized, and characterized. The crystal structure of compound 5l was determined with the X-ray diffraction (XRD) of single crystals. The antifungal activity of these compounds was studied against Botrytis cinerea, Pyricularia oryzae, Erysiphe graminis, Physalospora piricola, and Penicillium digitatum. Bioassay results were that most compounds had obvious inhibitory activity at 20 μg/mL. Compounds 5j, 5k, and 5l possessed outstanding inhibitory activity against B. cinerea. Their EC50 values were 0.540, 0.676, and 0.392 μg/mL, respectively. They owned better effects than fluxapyroxad (EC50 = 0.791 μg/mL). In the meantime, the inhibitory activity of 16 compounds was evaluated against SDH. It turned out that these compounds displayed excellent activity. The IC50 values of compounds 5j, 5k, and 5l reached 0.738, 0.873, and 0.506 μg/mL, respectively, whereas the IC50 value of fluxapyroxad was 1.031 μg/mL. The results of molecular dynamics (MD) simulation showed that compound 5l possessed a stronger affinity to SDH than fluxapyroxad.
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Affiliation(s)
- Wenjing Jiang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, P. R. China
| | - Tingting Zhang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, P. R. China
| | - Jingwen Wang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, P. R. China
| | - Wei Cheng
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, P. R. China
| | - Tong Lu
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, P. R. China
| | - Yingkun Yan
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, P. R. China
| | - Xiaorong Tang
- School of Science, Asymmetric Synthesis and Chirotechnology Key Laboratory of Sichuan Province, Xihua University, Chengdu 610039, P. R. China
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Cheng X, Xu Z, Luo H, Chang X, Lv X. Design, Synthesis, and Biological Evaluation of Novel Pyrazol-5-yl-benzamide Derivatives Containing Oxazole Group as Potential Succinate Dehydrogenase Inhibitors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:13839-13848. [PMID: 36270026 DOI: 10.1021/acs.jafc.2c04708] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
A series of pyrazol-5-yl-benzamide derivatives containing the oxazole group were designed and synthesized as potential SDH inhibitors. According to the results of the bioassays, most target compounds displayed moderate-to-excellent in vitro antifungal activities against Valsa mali, Sclerotinia scleotiorum, Alternaria alternata, and Botrytis cinerea. Among them, compounds C13, C14, and C16 exhibited more excellently inhibitory activities against S. sclerotiorum than boscalid (EC50 = 0.96 mg/L), with EC50 values of 0.69, 0.26, and 0.95 mg/L, respectively. In vivo experiments on rape leaves and cucumber leaves showed that compounds C13 and C14 exhibited considerable protective effects against S. sclerotiorum than boscalid. SEM analysis indicated that compounds C13 and C14 significantly destroyed the typical structure and morphology of S. scleotiorum hyphae. In the respiratory inhibition effect assays, compounds C13 (28.0%) and C14 (33.9%) exhibited a strong inhibitory effect on the respiration rate of S. sclerotiorum mycelia, which was close to boscalid (30.6%). The results of molecular docking indicated that compounds C13 and C14 could form strong interactions with the key residues TRP O:173, ARG P:43, TYR Q:58, and MET P:43 of the SDH. Furthermore, the antifungal mechanism of these derivatives was demonstrated by the SDH enzymatic inhibition assay. These results demonstrate that compounds C13 and C14 can be developed into novel SDH inhibitors for crop protection.
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Affiliation(s)
- Xiang Cheng
- School of Science, Anhui Agricultural University, Hefei 230036, China
| | - Zonghan Xu
- School of Science, Anhui Agricultural University, Hefei 230036, China
| | - Huisheng Luo
- School of Science, Anhui Agricultural University, Hefei 230036, China
| | - Xihao Chang
- School of Science, Anhui Agricultural University, Hefei 230036, China
| | - Xianhai Lv
- School of Science, Anhui Agricultural University, Hefei 230036, China
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
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19
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Koca İ, Yakan M, Çapan İ, Şahin E, Sert Y. Experimental and computational studies of 1,5-diphenyl-pyrazole-3-carboxamide compounds as potential Cannabinoid receptor type 1. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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20
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Gao W, Zhang Y, Chen L, Liu X, Li K, Han L, Yu Z, Ren J, Tang L, Fan Z. Novel [1,2,4]-Triazolo[3,4- b]-[1,3,4]thiadizoles as Potent Pyruvate Kinase Inhibitors for Fungal Control. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:10170-10181. [PMID: 35960265 DOI: 10.1021/acs.jafc.2c03758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
To discover novel target-based fungicidal candidates, a molecular design model was established with a three-dimensional (3D) structure of Rhizoctonia solani pyruvate kinase (RsPK) simulated with the AlphaFold 2 and YZK-C22 as a fungicidal lead. A series of novel [1,2,4]triazolo[3,4-b][1,3,4]thiadiazole derivatives were rationally designed, synthesized, evaluated for their fungicidal performance, and validated for their mode of action. The in vitro bioassays with R. solani indicated that compounds 5g, 5o, and 5z with an EC50 value ranging from 1.01 to 1.54 μg/mL displayed higher fungicidal activity than the positive control YZK-C22 with its EC50 of 3.14 μg/mL. Especially, 5o exhibited high potency and a broad spectrum against Alternaria solani, Botrytis cinerea, Cercospora arachidicola, Physalospora piricola, R. solani, and Sclerotinia sclerotiorum with its EC50 value falling between 1.54 and 13.10 μg/mL. Like all positive controls, 5g, 5o, and 5z showed excellent in vivo growth inhibition against Pseudoperonospora cubensis at 200 μg/mL. Even though the PK enzymatic inhibition assay showed that 5o was approximately 2.6 times less active than YZK-C22 (IC50: 29.14 vs 11.15 μg/mL, respectively), the similar fluorescence quenching patterns of RsPK by 5o and YZK-C22, and the docking results of interactions between RsPK and 5o or YZK-C22 implied that they might share the similar binding site in the RsPK active pocket. Our studies suggested that 5o could be used as a potent fungicidal lead for further optimization. The results of comparative molecular field analysis (CoMFA) provided a direction for further molecular design.
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Affiliation(s)
- Wei Gao
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Yue Zhang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Lai Chen
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Xiaoyu Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Kun Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Lijun Han
- College of Science, China Agricultural University, Beijing 100193, P. R. China
| | - Zhenwu Yu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Jinzhou Ren
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Liangfu Tang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zhijin Fan
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
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Yao L, Zhang G, Yu L, Liu S, Wang X, Fan T, Kang H, Feng W. Development of 1,3,4-Oxadiazole Derived Antifungal Agents and Their Application in Maize Diseases Control. FRONTIERS IN PLANT SCIENCE 2022; 13:912091. [PMID: 35599869 PMCID: PMC9114798 DOI: 10.3389/fpls.2022.912091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 04/20/2022] [Indexed: 06/15/2023]
Abstract
Maize is an important food crop and its fungal disease has become a limiting factor to improve the yield and quality of maize. In the control of plant pathogens, commercial fungicides have no obvious effect on corn diseases due to the emergence of drug resistance. Therefore, it is of great significance to develop new fungicides with novel structure, high efficiency, and low toxicity to control maize diseases. In this paper, a series of 1,3,4-oxadiazole derivatives were designed and synthesized from benzoyl hydrazine and aromatic aldehydes through condensation and oxidation cyclization reaction. The antifungal activity of oxadiazole derivatives against three maize disease pathogens, such as Rhizoctonia solani (R. solani), Gibberella zeae (G. zeae), and Exserohilum turcicum (E. turcicum), were evaluated by mycelium growth rate method in vitro. The results indicated that most of the synthesized derivatives exhibited positive antifungal activities. Especially against E. turcicum, several compounds demonstrated significant antifungal activities and their EC 50 values were lower than positive control carbendazim. The EC 50 values of compounds 4k, 5e, and 5k were 50.48, 47.56, 32.25 μg/ml, respectively, and the carbendazim was 102.83 μg/ml. The effects of active compounds on E. turcicum microstructure were observed by scanning electron microscopy (SEM). The results showed that compounds 4k, 5e, and 5k could induce the hyphae of E. turcicum to shrink and collapse obviously. In order to elucidate the preliminary mechanism of oxadiazole derivatives, the target compounds 5e and 5k were docked with the theoretical active site of succinate dehydrogenase (SDH). Compounds 5e and 5k could bind to amino acid residues through hydrophobic contact and hydrogen bonds, which explained the possible mechanism of binding between the inhibitor and target protein. In addition, the compounds with antifungal activities had almost no cytotoxicity to MCF-7. This study showed that 1,3,4-oxadiazole derivatives were worthy for further attention as potential antifungal agents for the control of maize diseases.
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Affiliation(s)
- Lin Yao
- Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi’an, China
- College of Pharmacy, Xi’an Medical University, Xi’an, China
| | - Guanghua Zhang
- Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi’an, China
| | - Lili Yu
- College of Pharmacy, Xi’an Medical University, Xi’an, China
| | - Shaojing Liu
- College of Pharmacy, Xi’an Medical University, Xi’an, China
| | - Xiaoku Wang
- College of Pharmacy, Xi’an Medical University, Xi’an, China
| | - Tao Fan
- College of Pharmacy, Xi’an Medical University, Xi’an, China
| | - Hui Kang
- College of Pharmacy, Xi’an Medical University, Xi’an, China
| | - Wenzhi Feng
- College of Pharmacy, Xi’an Medical University, Xi’an, China
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22
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Xu L, Yu J, Jin L, Pan L. Design, Synthesis, and Antifungal Activity of 4-Amino Coumarin Based Derivatives. Molecules 2022; 27:2738. [PMID: 35566096 PMCID: PMC9104767 DOI: 10.3390/molecules27092738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/17/2022] [Accepted: 04/19/2022] [Indexed: 12/10/2022] Open
Abstract
A series of 30 succinate dehydrogenase inhibitors (SDHIs) of 4-amino coumarin-based derivatives were designed and synthesized. According to the analysis of fungicidal activity in vitro, most of the compounds expressed broad-spectrum antifungal activity against four plant pathogenic fungi (Alternaria alternata, Alternaria solani, Fusarium oxysporum, and Botrytis cinerea) using the mycelium growth inhibition method. The results showed that compounds 3n with the group of 2-ene-3-methyl-butyl and 4e with the group of 2-bromo-1-oxo-hexyl displayed excellent activity against Alternaria alternata and Alternaria solani, with EC50 values of 92~145 μg/mL. Molecular docking showed that the inhibitor 3n was completely locked into the cavity of SDH, forming a conventional hydrogen bond interacting with the amino acid residue TYR58. The present work indicates that these derivatives would serve as novel potential fungicides targeting SDH.
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Affiliation(s)
| | | | - Lu Jin
- College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumqi 830052, China; (L.X.); (J.Y.)
| | - Le Pan
- College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumqi 830052, China; (L.X.); (J.Y.)
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23
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Sun S, Chen L, Huo J, Wang Y, Kou S, Yuan S, Fu Y, Zhang J. Discovery of Novel Pyrazole Amides as Potent Fungicide Candidates and Evaluation of Their Mode of Action. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3447-3457. [PMID: 35282681 DOI: 10.1021/acs.jafc.2c00092] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A rational molecule design strategy based on scaffold hopping was applied to discover novel leads, and then a series of novel pyrazole amide derivatives were designed, synthesized, characterized, and evaluated for their antifungal activities. Bioassay results indicated that some target compounds such as S3, S12, and S26 showed good in vivo antifungal activities; among them, S26 exhibited commendable in vivo protective activity with an 89% inhibition rate against Botrytis cinerea on cucumber at 100 μg/mL that is comparable to positive controls boscalid, isopyrazam, and fluxapyroxad. Microscopy observations suggested that S26 affects the normal fungal growth. Fluorescence quenching analysis and SDH (succinate dehydrogenase) enzymatic inhibition studies validated that S26 may not be an SDH inhibitor. Based on induction of plant defense responses testing, S26 enhanced the accumulation of RBOH, WRKY6, WRKY30, PR1, and PAL defense-related genes expression and the defense-associated enzyme phenylalanine ammonia lyase (PAL) expression on cucumber. These findings support that S26 not only displayed direct fungicidal activity but also exhibited plant innate immunity stimulation activity, and it could be used as a promising plant defense-related fungicide candidate.
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Affiliation(s)
- Susu Sun
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Lai Chen
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Jingqian Huo
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Ying Wang
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Song Kou
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Shitao Yuan
- Agricultural Science and Education Center of Hebei Agricultural University, Baoding 071001, P. R. China
| | - Yining Fu
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Jinlin Zhang
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
- Biological Control Center of Plant Diseases and Plant Pests of Hebei Province, Baoding 071001, P. R. China
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24
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Yang D, Qi X, Kalinina TA, Glukhareva TV, Tang L, Li Z, Fan Z. Synthesis of novel N-(2-phenyl-3-pyridyl) thiadiazole/isothiazole carboxamide analogs as potent plant elicitors. PEST MANAGEMENT SCIENCE 2022; 78:1138-1145. [PMID: 34799969 DOI: 10.1002/ps.6728] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 10/01/2021] [Accepted: 11/19/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Plant elicitors are a class of plant protection agents that can stimulate plant immunity against phytopathogen without a potential resistance problem. In searching for novel plant elicitor candidates, a series of novel N-(2-phenyl-3-pyridyl) thiadiazole/isothiazole carboxamide analogs were designed and synthesized. RESULTS In vitro bioassay showed that all new compounds exhibited weak direct fungicidal activity. However, compounds 3b, 3g, 3n and 3o showed broad spectrum of in vivo activity against four plant fungi tested. In particularly, 3g showed 80% activity against Rhizoctonia solani in a glasshouse at a concentration of 1 μg mL-1 . For induction activity of tobacco against tobacco mosaic virus (TMV), compounds 3c and 3v showed 67% and 68% inhibitory activity, respectively, which were superior to the positive controls ribavirin and ningnanmycin. Compound 3g showed moderate induction activity (41%). Reverse transcription quantitative polymerase chain reaction (RT-qPCR) analysis found that, 3g could up-regulate expression of genes that are related to reactive oxygen species (ROS), pathogenesis-related protein (PRP) and salicylic acid (SA) signalling. CONCLUSION These results indicated that 3g as an elicitor candidate might act on the SA signalling pathway. According to our findings, N-(2-phenyl-3-pyridyl) thiadiazole/isothiazole carboxamide analogs might be promising lead scaffolds as a novel plant elicitor for further investigation.
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Affiliation(s)
- Dongyan Yang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, P. R. China
- School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, P. R. China
| | - Xin Qi
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin, P. R. China
| | - Tatiana A Kalinina
- Department of Technology for Organic Synthesis, Institute of Chemical Technology, Ural Federal University Named after the First President of Russia B. N. Yeltsin, Ekaterinburg, Russia
| | - Tatiana V Glukhareva
- Department of Technology for Organic Synthesis, Institute of Chemical Technology, Ural Federal University Named after the First President of Russia B. N. Yeltsin, Ekaterinburg, Russia
| | - Liangfu Tang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin, P. R. China
| | - Zhengming Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin, P. R. China
| | - Zhijin Fan
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin, P. R. China
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25
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Luo B, Ning Y. Comprehensive Overview of Carboxamide Derivatives as Succinate Dehydrogenase Inhibitors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:957-975. [PMID: 35041423 DOI: 10.1021/acs.jafc.1c06654] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Up to now, a total of 24 succinate dehydrogenase inhibitors (SDHIs) fungicides have been commercialized, and SDHIs fungicides were also one of the most active fungicides developed in recent years. Carboxamide derivatives represented an important class of SDHIs with broad spectrum of antifungal activities. In this review, the development of carboxamide derivatives as SDHIs with great significances were summarized. In addition, the structure-activity relationships (SARs) of antifungal activities of carboxamide derivatives as SDHIs was also summarized based on the analysis of the structures of the commercial SDHIs and lead compounds. Moreover, the cause of resistance of SDHIs and some solutions were also introduced. Finally, the development trend of SDHIs fungicides was prospected. We hope this review will give a guide for the development of novel SDHIs fungicides in the future.
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Affiliation(s)
- Bo Luo
- College of Life Sciences, Xinyang Normal University, Tea Plant Biology Key Laboratory of Henan Province, Xinyang 464000, China
| | - Yuli Ning
- College of Life Sciences, Xinyang Normal University, Tea Plant Biology Key Laboratory of Henan Province, Xinyang 464000, China
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26
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Gao W, Zhang Y, Ye R, Qi X, Chen L, Liu X, Tang L, Chen L, Chen H, Fan Z. Discovery of Novel Triazolothiadiazines as Fungicidal Leads Targeting Pyruvate Kinase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1047-1057. [PMID: 35077164 DOI: 10.1021/acs.jafc.1c07022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Pyruvate kinase (PK) was discovered as a potent new target for novel fungicide development. A series of novel triazolothiadiazine derivatives were rationally designed and synthesized by a ring expansion strategy and computer-aided pesticide design using the 3D structure of Rhizoctonia solani PK (RsPK) obtained by homology modeling as a receptor and our previously discovered lead YZK-C22 as a ligand. The in vitro bioassay results indicated that compounds 4g, 6h, 6m, 6n, 6o, and 6p exhibited good activity against R. solani with the EC50 values falling between 10.99 and 72.76 μM. Especially, 6m showed similar potency to YZK-C22 (10.99 vs 11.97 μM of the EC50 value, respectively). The in vivo bioassay results suggested that 6m against R. solani at a concentration of 200 μg/mL displayed a numerically higher inhibition than YZK-C22 (70 vs 60%, respectively). A field experiment validated that 6m at an application rate of 120 g ai/ha showed comparable efficacy against R. solani to thifluzamide at an application rate of 80 g ai/ha (77.80 vs 84.5%, respectively). Enzymatic inhibition suggested that the potency of 6m was about twofold lower than that of YZK-C22 (67.30 vs 32.64 μM of IC50, respectively). Fluorescence quenching studies validated that RsPK was quenched by both 6m and YZK-C22, implying that they both might act at the same target site of PK. A possible binding conformation of 6m in the RsPK active site was depicted by molecular docking. Our studies suggest that 6m could be a fungicidal lead targeting PK.
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Affiliation(s)
- Wei Gao
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Yue Zhang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Rong Ye
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Xin Qi
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Lei Chen
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Xiaoyu Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Liangfu Tang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Lai Chen
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Hongyu Chen
- The Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing 100853, China
| | - Zhijin Fan
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
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Novel 4,5-dihydro-1H-pyrazole derivatives as potential succinate dehydrogenase inhibitors: design, synthesis, crystal structure, biological activity and molecular modeling. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131537] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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28
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Lu T, Yan Y, Zhang T, Zhang G, Xiao T, Cheng W, Jiang W, Wang J, Tang X. Design, Synthesis, Biological Evaluation, and Molecular Modeling of Novel 4 H-Chromene Analogs as Potential Succinate Dehydrogenase Inhibitors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:10709-10721. [PMID: 34476938 DOI: 10.1021/acs.jafc.1c03304] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Thirty-one new 4H-chromene derivatives were designed and synthesized. Their structures were identified with IR, 1H NMR, 13C NMR, and HRMS. The crystal structure of compound 2a was determined by single-crystal X-ray diffraction. Their antifungal activities were evaluated against Pyricularia oryzae, Erysiphe graminis, Coniella diplodiella, Pseudoperonospora cubensis, and Sclerotinia sclerotiorum. These results demonstrated that most compounds exhibited remarkable inhibitory activities at 20 μg/mL. Compounds 4b and 4c displayed excellent antifungal activity against S. sclerotiorum and possessed better efficacy than fluopyram. At the same time, the inhibitory activity of the bioactive compounds was evaluated against succinate dehydrogenase (SDH). The results showed that these compounds possessed outstanding activity. Compounds 4b and 4c displayed better inhibitory activity than fluopyram. The molecular modeling results revealed that compound 4c had stronger affinity to SDH than fluopyram. It is the first time that the inhibitory activity of 4H-chromene analogs against SDH has been reported.
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Affiliation(s)
- Tong Lu
- School of Science, Xihua University, Chengdu 610039, P.R. China
| | - Yingkun Yan
- School of Science, Xihua University, Chengdu 610039, P.R. China
| | - Tingting Zhang
- School of Science, Xihua University, Chengdu 610039, P.R. China
| | - Guilan Zhang
- School of Science, Xihua University, Chengdu 610039, P.R. China
| | - Tingting Xiao
- School of Science, Xihua University, Chengdu 610039, P.R. China
| | - Wei Cheng
- School of Science, Xihua University, Chengdu 610039, P.R. China
| | - Wenjing Jiang
- School of Science, Xihua University, Chengdu 610039, P.R. China
| | - Jingwen Wang
- School of Science, Xihua University, Chengdu 610039, P.R. China
| | - Xiaorong Tang
- School of Science, Xihua University, Chengdu 610039, P.R. China
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Wang W, Li Z, Gao W, Liu X, Lv Y, Hao Z, Tang L, Li K, Zhao B, Fan Z. Design, Synthesis, and Evaluation of Novel Isothiazole-Purines as a Pyruvate Kinase-Based Fungicidal Lead Compound. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:9461-9471. [PMID: 34355907 DOI: 10.1021/acs.jafc.1c01651] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Target identification is one of the most important bases for novel pesticide development; pyruvate kinase (PK) was discovered as a potent fungicide target in our previous studies. To continue the PK-based fungicide development, novel isothiazole-purine derivatives were rationally designed and synthesized. Bioassay results showed that compound 5ai displayed excellent in vitro activity against Rhizoctonia solani with an EC50 of 1.5 μg/mL, which was superior to those of positive controls diflumetorim with its EC50 of 19.8 μg/mL and PK-based lead YZK-C22 with its EC50 of 4.2 μg/mL. Compounds 3b (5.2 μg/mL) and 3c (4.5 μg/mL) displayed better activities against Gibberella zeae with their EC50s falling between 4.0 and 5.5 μg/mL, while YZK-C22 showed an EC50 of 6.4 μg/mL. In addition, 5ah exhibited promising in vivo activity against Erysiphe graminis and Puccinia sorghi Schw. with 100% efficacy at 10 μg/mL and 90% efficacy at 2 μg/mL against P. sorghi Schw. Compound 5ai showed good PK inhibitory activity with an IC50 of 38.8 μmol/L, and it was well docked into the active site of the target enzyme PK, which was slightly more active than YZK-C22 with its IC50 of 42.4 μmol/L. Our studies discovered that isothiazole-purines were PK-based fungicidal leads deserving of further study.
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Affiliation(s)
- Weibo Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zhixinyi Li
- School of Medicine, Nankai University, Tianjin 300071, P. R. China
| | - Wei Gao
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Xiaoyu Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - You Lv
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zesheng Hao
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Liangfu Tang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Kun Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Bin Zhao
- State Key Laboratory of North China Crop Improvement and Regulation, College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Zhijin Fan
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
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Design, synthesis and fungicidal activity of 3,4-dichloroisothiazolocoumarin-containing strobilurins. Mol Divers 2021; 26:951-961. [PMID: 33782814 DOI: 10.1007/s11030-021-10207-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/06/2021] [Indexed: 10/21/2022]
Abstract
Twenty-one novel 3,4-dichloroisothiazolocoumarin-containing strobilurins were rationally designed and synthesized. Preliminary bioassay showed that compounds 7c, 7h and 7l exhibited over 80% inhibitory rate against Sclerotinia sclerotiorum at 50 μg/mL, 7c exhibited good activity against S. sclerotiorum with median effective concentration (EC50) of 4.08 μg/mL, while the positive control coumoxystrobin showed EC50 of 1.00 μg/mL. In addition, 7d showed better fungicidal activity with a lower EC50 value of 7.65 μg/mL against Botrytis cinerea than that of positive control trifloxystrobin with its EC50 value of 21.96 μg/mL. This study indicated that 3,4-dichloroisothiazolocoumarin-containing strobilurin was a promising fungicide lead deserved for further study.
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