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Leng XY, Pang QF, Ma YF, Ye BW, Ye F, Fu Y. Integrated Virtual Screening and Validation toward Potential HPPD Inhibition Herbicide. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:4587-4595. [PMID: 38408430 DOI: 10.1021/acs.jafc.3c06312] [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: 02/28/2024]
Abstract
4-Hydroxyphenylpyruvate dioxygenase (EC 1.13.11.27, HPPD) is one of the most widely studied herbicide targets and has gained significant attention. To identify potential effective HPPD inhibitors, a rational multistep virtual screening workflow was built, which included CBP models (based on the receptor-ligand interactions in the crystal complex), Hypogen models with activity prediction ability (according to the derivation of structure-activity relationships from a set of molecules with reported activity values), and a consensus docking procedure (consisting of LibDock, Glide, and CDOCKER). About 1 million molecules containing diketone or β-keto-enol substructures were filtered by Lipinski's rules, CBP model, and Hypogen model. A total of 12 compounds with similar docking postures were generated by consensus docking. Eventually, four molecules were screened based on the specific binding pattern and affinity of the HPPD inhibitor. The biological evaluation in vivo displayed that compounds III-1 and III-2 exhibited comparable herbicidal activity to isoxaflutole and possessed superior safety on various crops (wheat, rice, sorghum, and maize). The ADMET prediction (absorption, distribution, metabolism, excretion, and toxicity) showed that compound III possessed relatively good toxicological results. This work provides a theoretical basis and valuable reference for the virtual screening and molecular design of novel HPPD inhibition herbicides.
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Affiliation(s)
- Xin-Yu Leng
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Qi-Fan Pang
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Yi-Fan Ma
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Bo-Wen Ye
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Fei Ye
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Ying Fu
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
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Wei S, Zhao Z, Chen Y, Li Z, Huang Y, Zhang H, Ji Z. N-benzyl-2-methoxy-5-propargyloxybenzoamides, a new type of bleaching herbicides targeting the biosynthesis pathway of plastoquinone. PEST MANAGEMENT SCIENCE 2023; 79:5087-5095. [PMID: 37559430 DOI: 10.1002/ps.7708] [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: 05/04/2023] [Revised: 07/18/2023] [Accepted: 08/06/2023] [Indexed: 08/11/2023]
Abstract
BACKGROUND Previously, the herbicidal activity of N-benzyl-2-methoxybenzamides was discovered during a random screening program in our laboratory. The chemicals resulted in bleaching effect of newly grown leaves by interfering with the biosynthesis of β-carotene in plant. RESULTS A total of 28 benzamides were synthesized and subjected for the evaluation of herbicidal activity. Structure-activity relationship (SAR) showed that introducing propargyloxy group at 5-position of benzoyl-benzene ring and fluorine or methyl group at 3- or 4-position of benzyl-benzene ring is beneficial for the activity. Post-emergence herbicidal activities of compounds 406 and 412 were comparable to those of mesotrione and diflufenican. Studies on MOA showed that 406 decreased the level of both β-carotene and plastoquinone (PQ) in treated plants. The bleaching effect in green alga caused by 406 could be reversed by supplying exogenous homogentisic acid (HGA), the precursor of plastoquinone. CONCLUSION N-benzyl-2-methoxy-5-propargyloxybenzoamides were discovered as new candidates for bleaching herbicides. Preliminary investigation on mechanism of action (MOA) showed that the title compounds might indirectly interfere with carotenoid biosynthesis by blocking the production of PQ. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Shaopeng Wei
- College of Plant Protection, Northwest A&F University, Yangling, China
- Shaanxi Province Key Laboratory Research & Development on Botanical Pesticides, Northwest A&F University, Yangling, China
| | - Zhuoran Zhao
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Yu Chen
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Zhanbin Li
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Yuqian Huang
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Huixia Zhang
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Zhiqin Ji
- College of Plant Protection, Northwest A&F University, Yangling, China
- Shaanxi Province Key Laboratory Research & Development on Botanical Pesticides, Northwest A&F University, Yangling, China
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Shahid M, Khan MS. Ecotoxicological implications of residual pesticides to beneficial soil bacteria: A review. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 188:105272. [PMID: 36464377 DOI: 10.1016/j.pestbp.2022.105272] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/02/2022] [Accepted: 10/23/2022] [Indexed: 06/17/2023]
Abstract
Optimization of crop production in recent times has become essential to fulfil food demands of constantly increasing human populations worldwide. To address this formidable challenge, application of agro-chemicals including synthetic pesticides in intensive farm practices has increased alarmingly. The excessive and indiscriminate application of pesticides to foster food production however, leads to its exorbitant deposition in soils. After accumulation in soils beyond threshold limits, pesticides harmfully affect the abundance, diversity and composition and functions of rhizosphere microbiome. Also, the cost of pesticides and emergence of resistance among insect-pests against pesticides are other reasons that require attention. Due to this, loss in soil nutrient pool cause a substantive reduction in agricultural production which warrant the search for newer environmentally friendly technology for sustainable crop production. Rhizosphere microbes, in this context, play vital roles in detoxifying the polluted environment making soil amenable for cultivation through detoxification of pollutants, rhizoremediation, bioremediation, pesticide degradation, and stress alleviation, leading to yield optimization. The response of soil microorganisms to range of chemical pesticides is variable ranging from unfavourable to the death of beneficial microbes. At cellular and biochemical levels, pesticides destruct the morphology, ultrastructure, viability/cellular permeability, and many biochemical reactions including protein profiles of soil bacteria. Several classes of pesticides also disturb the molecular interaction between crops and their symbionts impeding the overall useful biological processes. The harmful impact of pesticides on soil microbes, however, is poorly researched. In this review, the recent findings related with potential effects of synthetic pesticides on a range of soil microbiota is highlighted. Emphasis is given to find and suggest strategies to minimize the chemical pesticides usage in the real field conditions to preserve the viability of soil beneficial bacteria and soil quality for safe and sustainable crop production even in pesticide contaminated soils.
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Affiliation(s)
- Mohammad Shahid
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India.
| | - Mohammad Saghir Khan
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
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Allaka BS, Basavoju S, Gamidi RK. Transition Metal‐ and Oxidant‐Free Regioselective Synthesis of 3,4,5‐Trisubstituted Pyrazoles by Means of [3+2] Cycloaddition Reactions. ChemistrySelect 2022. [DOI: 10.1002/slct.202200605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Bhargava Sai Allaka
- Department of Chemistry National Institute of Technology Warangal Hanamkonda 506 004 Telangana India
| | - Srinivas Basavoju
- Department of Chemistry National Institute of Technology Warangal Hanamkonda 506 004 Telangana India
| | - Rama Krishna Gamidi
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune Maharashtra 411 008 India
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Zhang H, Wang J, Ji Z, Sun X, Tian Q, Wei S, Ji Z. Discovery, SAR, and putative mode of action of N-benzyl-2-methoxybenzamides as potential bleaching herbicides. PEST MANAGEMENT SCIENCE 2021; 77:2804-2811. [PMID: 33522122 DOI: 10.1002/ps.6313] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 01/20/2021] [Accepted: 01/31/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Herbicides acting on biosynthesis of plant pigments have contributed greatly to weed control in recent years. In our previous studies, 2-methoxybenzamides were discovered as a novel type of lead compound for the development of bleaching herbicides. RESULTS A total of 67 benzamide analogues were synthesized and evaluated for herbicidal activity. The structure-activity relationship (SAR) revealed that a methoxyl substitution at the 2-position of the benzoyl moiety is essential for the herbicidal activity of benzamide derivatives, and introduction of small substituents at the meta- or para-position of the benzylamine moiety is also beneficial. Compounds 4, 43 and 44 showed 100% inhibition against Abutilon theophrasti and Amaranthus retroflexus at an application rate of 150 g a.i. ha-1 . CONCLUSION The relationship between the structure and herbicidal activity of 2-methoxybenzamides was discussed intensively. Compounds 4, 43 and 44 may serve as novel candidates with a bleaching effect. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Huixia Zhang
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Jinbo Wang
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Zhenmeng Ji
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Xinlin Sun
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Qizhen Tian
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Shaopeng Wei
- College of Plant Protection, Northwest A&F University, Yangling, China
- Shaanxi Province Key Laboratory Research & Development on Botanical Pesticides, Northwest A&F University, Yangling, China
| | - Zhiqin Ji
- College of Plant Protection, Northwest A&F University, Yangling, China
- Shaanxi Province Key Laboratory Research & Development on Botanical Pesticides, Northwest A&F University, Yangling, China
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Huang JJ, Wang F, Ouyang Y, Huang YQ, Jia CY, Zhong H, Hao GF. HerbiPAD: a free web platform to comprehensively analyze constitutive property and herbicide-likeness to estimate chemical bioavailability. PEST MANAGEMENT SCIENCE 2021; 77:1273-1281. [PMID: 33063413 DOI: 10.1002/ps.6140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 10/10/2020] [Accepted: 10/16/2020] [Indexed: 05/26/2023]
Abstract
BACKGROUND Herbicides, as efficient weed control measures, play a crucial role in ensuring food security. The emergence of herbicide-resistant weeds has negatively affected food security and promoted the demand for new and improved herbicides. The balance between bioavailability and the potency of a compound is one of the most pressing challenges in the development of novel ideal herbicides. Herbicide-likeness analysis is crucial for the evaluation of this balance and thus may help to address this issue. Many herbicide-likeness analysis methods have been developed to screen potential novel lead compounds. However, there remains a lack of user-friendly and integrated tools to comprehensively evaluate herbicide-likeness. RESULTS Herbicide-likeness of compounds was assessed through integrated analysis incorporating the physicochemical properties of commercial herbicides, a qualitative rule, and three quantitative scoring functions developed for evaluating herbicide-likeness. HerbiPAD (http://agroda.gzu.edu.cn:9999/ccb/database/HerbiPAD/) is a free web platform integrated with the collected database and scoring model. This platform contains 542 approved herbicides and > 29 000 physicochemical descriptors. The accuracy of HerbiPAD in distinguishing known herbicides from nonherbicides was 84.2%. In the case study, HerbiPAD evaluated 60 new compounds from seven different herbicide targets, and the accuracy of predicting better bioavailability was 83.3%. CONCLUSIONS HerbiPAD was designed to quickly and efficiently evaluate herbicide-likeness by integrating qualitative and quantitative analyses. The simple and effective interpretation of the analysis interface may help noncomputational experts understand herbicide-likeness. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Jun-Jie Huang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, China
| | - Fan Wang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan, China
| | - Yan Ouyang
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, China
| | - Yuan-Qin Huang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, China
| | - Chen-Yang Jia
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan, China
| | - Hang Zhong
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, China
| | - Ge-Fei Hao
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, China
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Peng W, Fu X, Xiong Z, Xiang M, Yang Y, Wu H, Shi X, Huo G, Cui R, Li B. Chemical components from the stems and leaves of Clausena lansium (Lour.) Skeels and their potential herbicidal effects. PEST MANAGEMENT SCIENCE 2021; 77:1355-1360. [PMID: 33089666 DOI: 10.1002/ps.6150] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/18/2020] [Accepted: 10/21/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Clausena lansium (Lour.) Skeels, belonging to the genus Clausena of the family Rutaceae, has a wide range of medical and agricultural activities. Previous studies on agricultural activities have shown that C. lansium extracts and some components have obvious herbicidal activities. In order to study systematically herbicidal activity of this plant, we studied the herbicidal effect of ethyl acetate (EtOAc) extract from the stems and leaves of this plant and further isolated the active compounds. RESULTS The EtOAc extract inhibited the growth of roots and shoots of Echinochloa crus-galli (L.) Beauv., and the inhibitory effect of the EtOAc extract on roots were stronger than those on shoots with half maximal inhibitory concentration (IC50 ) values of 420.45 and 585.05 mg L-1 , respectively. Fifteen compounds were subsequently isolated and identified from the stems and leaves of C. lansium, including nine O-monoterpenoid furanocoumarins and six cinnamamides. Our results showed that most compounds exhibited varying degrees of herbicidal activities to E. crus-galli. Among them, compounds 3, 8, and 13-15 showed the best inhibitory activities on the growth of E. crus-galli roots, with inhibition rate values ranging from 70% to 83% at a concentration of 300 mg L-1 . Compounds 1 and 2 are two new compounds, and their structures were established as 5-O-monoterpenoid furanocoumarin and 8-O-monoterpenoid furanocoumarin, and named as claulansicoumarin-A and -B, respectively. CONCLUSION The EtOAc extract and pure compounds showed noticeable herbicidal activities against E. crus-galli and indicated a great potential for these natural compounds to be developed as a herbicide. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Wenwen Peng
- Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang, China
- College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Xiaoxiang Fu
- College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Zhonghua Xiong
- College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Miaolian Xiang
- College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Yule Yang
- College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Hongliang Wu
- College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Xugen Shi
- College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Guanghua Huo
- Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang, China
| | - Ruqiang Cui
- College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Baotong Li
- School of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, China
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Design and synthesis of acrylate and acrylamide substituted pyrimidinediones as potential PPO herbicides. Bioorg Med Chem 2021; 31:115959. [PMID: 33387696 DOI: 10.1016/j.bmc.2020.115959] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/10/2020] [Accepted: 12/10/2020] [Indexed: 12/23/2022]
Abstract
PPO herbicides emerge to be widely use in the agricultural field and a focus of research to many scientists due to its environmentally-friendly properties. In lieu with this, this study presents acrylate and acrylamide substituted pyrimidinediones as PPO herbicide candidates. Most synthesized compounds exhibits herbicidal activities against both monocot and dicot weeds, especially, compound 5a which showed non-selective superior activity against the commercialized, Saflufenacil. Compound 5a was further tested for residual effect and showed promising results as shorter period is needed to cultivate the next crops. The synthesized acrylate and acrylamide substituted pyrimidinediones, especially, 5a could potentially be utilized in the development of commercial protoporphyrinogen oxidase inhibitors with further tests and studies.
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Meng JP, Wang WW, Chen YL, Bera S, Wu J. Switchable solvent-controlled divergent synthesis: an efficient and regioselective approach to pyrimidine and dibenzo[b,f][1,4]oxazepine derivatives. Org Chem Front 2020. [DOI: 10.1039/c9qo01126a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An efficient solvent-controlled regioselective reaction has been developed. The reaction represents a novel protocol for the divergent one-pot synthesis of pyrimidine and dihydrodibenzo[b,f][1,4]oxazepine derivatives.
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Affiliation(s)
- Jin-Peng Meng
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. of China
| | - Wan-Wan Wang
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. of China
| | - Ying-Lu Chen
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. of China
| | - Saurav Bera
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. of China
| | - Jun Wu
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. of China
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Ding G, Guo D, Zhang W, Han P, Punyapitak D, Guo M, Zhang Z, Wang B, Li J, Cao Y. Preparation of novel auxinic herbicide derivatives with high-activity and low-volatility by me-too method. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.09.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Lei P, Zhang X, Xu Y, Xu G, Liu X, Yang X, Zhang X, Ling Y. Synthesis and fungicidal activity of pyrazole derivatives containing 1,2,3,4-tetrahydroquinoline. Chem Cent J 2016; 10:40. [PMID: 27382411 PMCID: PMC4932680 DOI: 10.1186/s13065-016-0186-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 06/20/2016] [Indexed: 12/02/2022] Open
Abstract
Background Take-all of wheat, caused by the soil-borne fungus Gaeumannomyces graminis var. tritici, is one of the most important and widespread root diseases. Given that take-all is still hard to control, it is necessary to develop new effective agrochemicals. Pyrazole derivatives have been often reported for their favorable bioactivities. In order to discover compounds with high fungicidal activity and simple structures, 1,2,3,4-tetrahydroquinoline, a biologically active group of natural products, was introduced to pyrazole structure. A series of pyrazole derivatives containing 1,2,3,4-tetrahydroquinoline were synthesized, and their fungicidal activities were evaluated. Results The bioassay results demonstrated that the title compounds displayed obvious fungicidal activities at a concentration of 50 μg/mL, especially against V. mali, S. sclerotiorum and G. graminis var. tritici. The inhibition rates of compounds 10d, 10e, 10h, 10i and 10j against G. graminis var. tritici were all above 90 %. Even at a lower concentration of 16.7 μg/mL, compounds 10d and 10e exhibited satisfied activities of 100 % and 94.0 %, respectively. It is comparable to that of the positive control pyraclostrobin with 100 % inhibition rate. Conclusion A series of pyrazole derivatives containing 1,2,3,4-tetrahydroquinoline were synthesized and their structures were confirmed by 1H NMR, 13C NMR, IR spectrum and HRMS or elemental analysis. The crystal structure of compound 10g was confirmed by X-ray diffraction. Bioassay results indicated that all title compounds exhibited obvious fungicidal activities. In particular, compounds 10d and 10e showed comparable activities against G. graminis var. tritici with the commercial fungicide pyraclostrobin at the concentration of 16.7 μg/mL.A series of pyrazole derivatives containing 1,2,3,4-tetrahydroquinoline were designed and synthesized. Bioassay results indicated that all these compounds exhibited obvious fungicidal activities. ![]() Electronic supplementary material The online version of this article (doi:10.1186/s13065-016-0186-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Peng Lei
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Xuebo Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Yan Xu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Gaofei Xu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Xili Liu
- Department of Plant Pathology, China Agricultural University, Beijing, 100193 China
| | - Xinling Yang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Xiaohe Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Yun Ling
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
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Synthesis and Herbicidal Activity of 5-Heterocycloxy-3-methyl-1-substituted-1H-pyrazoles. Molecules 2015; 21:E39. [PMID: 26712728 PMCID: PMC6273275 DOI: 10.3390/molecules21010039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 12/09/2015] [Accepted: 12/11/2015] [Indexed: 11/17/2022] Open
Abstract
With the objective of finding valuable herbicidal candidates, a series of new 5-heterocycloxy-3-methyl-1-substituted-1H-pyrazoles were synthesized and their herbicidal activities were evaluated. The bioassay results showed that some compounds exhibited excellent herbicidal activities at the concentration of 100 mg/L, and compound 5-chloro-2-((3-methyl-1-(2,2,2-trifluoroethyl)-1H-pyrazol-5-yl)oxy)pyrimidine showed bleaching activity to green weeds. In greenhouse conditions, this compound also showed excellent post-emergence herbicidal effect against Digitaria sanguinalis L. at the dosage of 750 g a. i. ha−1.
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Ma HJ, Zhang JH, Xia XD, Kang J, Li JH. Design, synthesis and herbicidal evaluation of novel 4-(1H-pyrazol-1-yl)pyrimidine derivatives. PEST MANAGEMENT SCIENCE 2015; 71:1189-1196. [PMID: 25256846 DOI: 10.1002/ps.3918] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 09/11/2014] [Accepted: 09/22/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND A series of novel pyrazolylpyrimidine derivatives were designed, synthesised and characterised by IR, (1) H NMR, (13) C NMR, mass spectroscopy and elemental analysis. The herbicidal activities of 30 pyrazolylpyrimidine derivatives were assessed. RESULTS Nine compounds caused good herbicidal activity for Pennisetum alopecuroides L. Among them, N-ethyl-6-[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]-pyrimidin-4-amine exhibited the strongest inhibitory activity against the root growth of P. alopecuroides, with an IC50 of 1.90 mg L(-1) . 2-Methyl-4-[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]-6-(prop-2-yn-1-yloxy)pyrimidine produced the highest inhibition of chlorophyll level in seedlings of P. alopecuroides (IC50 = 3.14 mg L(-1) ). CONCLUSION The structure-activity relationship indicated that the alkynyloxy group at the 6-position on the pyrimidine ring played a very important role for bleaching activities. When the alkynyloxy group was replaced by alkoxy, amino, alkylthio and alkylsulfonyl groups, the bleaching activities of the compounds were diminished. However, the compounds substituted by an amino at the 6-position of the pyrimidine ring exhibited excellent inhibition activities against weed root growth.
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Affiliation(s)
- Hong-Ju Ma
- Department of Plant Protection, College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Jian-Hua Zhang
- Department of Plant Protection, College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Xiang-Dong Xia
- Department of Plant Protection, College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Jing Kang
- Department of Plant Protection, College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Jian-Hong Li
- Department of Plant Protection, College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
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Ajani OO, Isaac JT, Owoeye TF, Akinsiku AA. Exploration of the Chemistry and Biological Properties of Pyrimidine as a Privilege Pharmacophore in Therapeutics. ACTA ACUST UNITED AC 2015. [DOI: 10.3923/ijbc.2015.148.177] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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