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Ma T, Zhong X, Yang Y, Liu W, Guo B, Fan J, Tang L, Fan L, Li Y. Synthesis and evaluation of imidazo[1,2-a]quinoxaline derivatives as potential antifungal agents against phytopathogenic fungi. Mol Divers 2023:10.1007/s11030-023-10739-y. [PMID: 37847466 DOI: 10.1007/s11030-023-10739-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 09/30/2023] [Indexed: 10/18/2023]
Abstract
To discover novel and effective potential agricultural antifungal agents, various kinds of imidazo[1,2-a]quinoxaline derivatives were designed, and synthesized from available and inexpensive reagents. Their antifungal activities were first evaluated against ten typical phytopathogenic fungi. The in vitro antifungal activity showed that some compounds exhibited more obvious broad-spectrum fungicidal activity than the two commercially-available fungicides chlorothalonil and hymexazol. Valsa mali and Botrytis cinerea strains exhibited the highest susceptibility with EC50 values of 1.4-27.0 μg/mL to more than ten compounds. Compounds 5c and 5f showed the most promising inhibitory effects against Valsa mali (EC50 = 5.6 μg/mL) and Fusarium solani (EC50 = 5.1 μg/mL), respectively. Preliminary studies on the mechanism of action indicated that the imidazo[1,2-a]quinoxaline skeleton likely exerted its antifungal effects by disrupting hyphal differentiation, spore germination, and germ tube growth. Moreover, the cell experiment results indicated that these target compounds possessed good safety to BV2 cells. Overall, compounds 5c and 5f can be considered candidate compounds against specific fungi for further detailed research. This study can provide a theoretical basis for the application of imidazo[1,2-a]quinoxaline scaffolds as novel fungicides in agriculture.
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Affiliation(s)
- Taigui Ma
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Xu Zhong
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Ya Yang
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Wenjing Liu
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Bing Guo
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Judi Fan
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Lei Tang
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Lingling Fan
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, People's Republic of China.
| | - Yong Li
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, People's Republic of China.
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Zhang C, Ding D, Wang B, Wang Y, Li N, Li R, Yan Y, He J. Effect of Potato Glycoside Alkaloids on Energy Metabolism of Fusarium solani. J Fungi (Basel) 2023; 9:777. [PMID: 37504765 PMCID: PMC10381234 DOI: 10.3390/jof9070777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/17/2023] [Accepted: 07/22/2023] [Indexed: 07/29/2023] Open
Abstract
Fusarium solani is one of the primary pathogens causing root rot of wolfberry. The aims of this study were to investigate the inhibitory effect of potato glycoside alkaloids (PGA) on F. solani and its energy metabolism. In this study, the effects of PGA treatment on the growth and development of F. solani were investigated and the changes in the glycolytic pathway (EMP), ATPase activity, mitochondrial complex activity, mitochondrial structure, and energy charge level were analyzed to elucidate the possible antifungal mechanism of PGA on F. solani. The results showed that PGA treatment inhibited the colony growth, biomass, and spore germination of F. solani. PGA treatment reduced the glucose content and Hexokinase (HK) activity of F. solani, but increased the activity of Fructose-6-Phosphate Kinase (PFK) and Pyruvate Kinase (PK) and promoted the accumulation of pyruvic acid. In addition, PGA treatment inhibited the activities of H+-ATPase, Ca2+-ATPase, and mitochondrial complex IV, increased the mitochondrial inner membrane Ca2+ content and mitochondrial membrane permeability transition pore, and decreased the contents of ATP, ADP, and AMP as well as the energy charge. These results indicate that PGA treatment inhibits the growth and development of F. solani, activates the glycolysis pathway, inhibits ATPase activity and mitochondrial complex activity, and destroys the structure and function of mitochondrial membrane, resulting in a lower energy charge level.
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Affiliation(s)
- Chongqing Zhang
- College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
| | - Dedong Ding
- College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
| | - Bin Wang
- College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
| | - Yupeng Wang
- College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
| | - Nan Li
- College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
| | - Ruiyun Li
- College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
| | - Yuke Yan
- College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
| | - Jing He
- College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
- Wolfberry Harmless Cultivation Engineering Research Center of Gansu Province, Lanzhou 730070, China
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Yang C, Li Y, Zhang Y, Hu Q, Liu Y, Li YF, Shi HC, Song LL, Cao H, Hao XJ, Zhi XY. Natural Sesquiterpene Lactone as Source of Discovery of Novel Fungicidal Candidates: Structural Modification and Antifungal Activity Evaluation of Xanthatin Derived from Xanthium strumarium L. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37449982 DOI: 10.1021/acs.jafc.3c02435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
As part of our ongoing efforts to discover novel agricultural fungicidal candidates from natural sesquiterpene lactones, in the present work, sixty-three xanthatin-based derivatives containing a arylpyrazole, arylimine, thio-acylamino, oxime, oxime ether, or oxime ester moiety were synthesized. Their structures were well characterized by 1H and 13C nuclear magnetic resonance and high-resolution mass spectrometry, while the absolute configurations of compounds 5' and 6a were further determined by single-crystal X-ray diffraction. Meanwhile, the antifungal activities of the prepared compounds against several phytopathogenic fungi were investigated using the spore germination method and the mycelium growth rate method in vitro. The bioassay results illustrated that compounds 5, 5', and 15 exhibited excellent inhibitory activity against the tested fungal spores and displayed remarkable inhibitory effects on fungal mycelia. Compounds 5 and 5' exhibited more potent inhibitory activity (IC50 = 1.1 and 24.8 μg/mL, respectively) against the spore of Botrytis cinerea than their precursor xanthatin (IC50 = 37.6 μg/mL), wherein the antifungal activity of compound 5 was 34-fold higher than that of xanthatin and 71-fold higher than that of the positive control, difenoconazole (IC50 = 78.5 μg/mL). Notably, compound 6'a also demonstrated broad-spectrum inhibitory activity against the four tested fungal spores. Meanwhile, compounds 2, 5, 8, and 15 showed prominent inhibitory activity against the mycelia of Cytospora mandshurica with the EC50 values of 2.3, 11.7, 11.1, and 3.0 μg/mL, respectively, whereas the EC50 value of xanthatin was 14.8 μg/mL. Additionally, compounds 5' and 15 exhibited good in vivo therapeutic and protective effects against B. cinerea with values of 55.4 and 62.8%, respectively. The preliminary structure-activity relationship analysis revealed that the introduction of oxime, oxime ether, or oxime ester structural fragment at the C-4 position of xanthatin or the introduction of a chlorine atom at the C-3 position of xanthatin might be significantly beneficial to antifungal activity. In conclusion, the comprehensive investigation indicated that partial xanthatin-based derivatives from this study could be considered for further exploration as potential lead structures toward developing novel fungicidal candidates for crop protection.
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Affiliation(s)
- Chun Yang
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
- Shanxi Key Laboratory for Modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Yang Li
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Yuan Zhang
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Qiang Hu
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Ying Liu
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Yang-Fan Li
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Hong-Cheng Shi
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Li-Li Song
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Hui Cao
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Xiao-Juan Hao
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Xiao-Yan Zhi
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
- Shanxi Key Laboratory for Modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
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Synthesis of new 1,2,3-triazole linked benzimidazolidinone : single crystal X-ray structure, biological activities evaluation and molecular docking studies. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Natural product-based semisynthesis and biological evaluation of thiol/amino-Michael adducts of xanthatin derived from Xanthium strumarium as potential pesticidal agents. Bioorg Chem 2020; 97:103696. [PMID: 32135360 DOI: 10.1016/j.bioorg.2020.103696] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/12/2020] [Accepted: 02/23/2020] [Indexed: 01/10/2023]
Abstract
Xanthatin, a natural sesquiterpene lactone, occurs as one of the major constituents of Xanthium plants (Compositae) and exhibits many important biological properties. To discover natural products-based pesticides, forty-nine Michael-type thiol/amino adducts of xanthatin were synthesized and characterized, while their pesticidal activities were investigated. Among them, compounds 2c, 2h, 2i, and 2t exhibited more potent antifungal activity against Botrytis cinerea (IC50 = 0.96, 0.38, 6.33, and 7.21 µg/mL, respectively) than xanthatin and the two commercial fungicides. Compounds 2t and 2u displayed broad-spectrum and excellent antifungal effects against all tested phytopathogenic fungi, while their IC50 values ranged from 7.21 to 75.88 µg/mL. Compounds 2a, 2f, 2l, 2m, 2v, 7c, 7e, 7h, 7i, and 7j showed moderate larvicidal activity against Plutella xylostella Linnaeus. Furthermore, compounds 2b, 7g, and 7h demonstrated significant ovicidal activity against P. xylostella with the LC50 values of 14.04, 10.00, and 11.95 mg/L, respectively. These findings suggest that thiol/amino appended in the C-13 position of xanthatin may improve antifungal and ovicidal activities for the derivatives. It was also noticed that the exocyclic double bond of xanthatin is crucial for its larvicidal activity. This work also provides some important hints for further design, synthesis, and structural modification of the xanthanolides sesquiterpene lactones toward development of the new environmentally friendly pesticides for sustainable agricultural production.
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Semisynthesis and biological evaluation of some novel Mannich base derivatives derived from a natural lignan obovatol as potential antifungal agents. Bioorg Chem 2019; 94:103469. [PMID: 31787345 DOI: 10.1016/j.bioorg.2019.103469] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 11/03/2019] [Accepted: 11/21/2019] [Indexed: 02/05/2023]
Abstract
Obovatol, a novel lignan isolated from the leaf and stem bark of Magnolia obovata Thunb exhibits many important biological activities. To discover natural-product-based potential fungicides with novel structural skeletons, a series of Mannich base derivatives were prepared by the C-4-aminomethylated modification of obovatol and all synthesized compounds were evaluated for antifungal activities in vitro against several phytopathogenic fungi using the spore germination method and the mycelium growth rate method. Furthermore, their structures were also characterized by 1H NMR, 13C NMR, and HR-MS, and compound 2k was further analyzed by single-crystal X-ray diffraction. Among all of the derivatives, compounds 2b (IC50 = 28.68 µg/mL) and 2g (IC50 = 16.90 µg/mL) demonstrated greater inhibition of Botrytis cinerea spore germination than two positive controls, hymexazol and difenoconazole. Compounds 2c, 2f, and 2g displayed potent mycelial growth inhibition of B. cinerea with an average inhibition rate (AIR) of >90% at a concentration of 100 µg/mL. Additionally, the structure-activity relationships (SARs) suggested that the introduction of a diethylamino, pyrrolyl, 1-methyl-piperazinyl or 1-ethyl-piperazinyl groups on the C-4 position of obovatol may be more likely to yield potential antifungal compounds than the introduction of 4-phenyl-piperazinyl or 4-phenyl-piperidinyl groups.
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He L, Cui K, Song Y, Zhang Z, Li B, Mu W, Liu F. A precisely targeted application strategy of dipping young cucumber fruit in fungicide to control cucumber gray mold. PEST MANAGEMENT SCIENCE 2018; 74:2432-2437. [PMID: 29704289 DOI: 10.1002/ps.5055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 04/19/2018] [Accepted: 04/22/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Gray mold is a ubiquitous destructive plant disease found worldwide. To avoid the shortcomings of conventional spraying systems for controlling this disease, such as high selection pressure on Botrytis cinerea for resistance and fungicide waste resulting from spray drift, a precisely targeted application strategy of dipping young cucumber fruit in a mixture of fungicide and forchlorfenuron (plant growth regulator, PGR) during the bloom period to control cucumber gray mold was developed in the current study. RESULTS Without leaving above-limit residues in cucumber fruits, dipping in fludioxonil at 30 mg L-1 provided a greater efficacy (85.4%) against cucumber gray mold than did spraying at 100 mg L-1 (76.4%). Importantly, fludioxonil mixed with forchlorfenuron from 25 to 35 mg L-1 increased the yield of cucumbers by 26.2-36.7% compared to dipping fruit only in forchlorfenuron. The increased yield may be a benefit of controlling gray mold. CONCLUSION Dipping fruit in fungicides and PGRs seems to be a potential precisely targeted application strategy to not only control cucumber gray mold effectively but also, through the action of PGRs, to increase the cucumber yield. This novel application method is believed to have a bright prospect in cucumber production in Chinese solar glasshouses. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Leiming He
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, P. R. China
| | - Kaidi Cui
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, P. R. China
| | - Yufei Song
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, P. R. China
| | - Zhengqun Zhang
- College of Horticultural Science and Engineering, Shandong Agricultural University, Tai'an, P. R. China
| | - Beixing Li
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, P. R. China
| | - Wei Mu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, P. R. China
| | - Feng Liu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, P. R. China
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Wei S, Li L, Shu Y, Zhao K, Ji Z. Synthesis, antifungal and antitumor activity of two new types of imidazolin-2-ones. Bioorg Med Chem 2017; 25:6501-6510. [DOI: 10.1016/j.bmc.2017.10.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 10/18/2017] [Accepted: 10/20/2017] [Indexed: 11/29/2022]
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10
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Delong W, Lanying W, Yongling W, Shuang S, Juntao F, Xing Z. Natural α-methylenelactam analogues: Design, synthesis and evaluation of α-alkenyl-γ and δ-lactams as potential antifungal agents against Colletotrichum orbiculare. Eur J Med Chem 2017; 130:286-307. [PMID: 28254700 DOI: 10.1016/j.ejmech.2017.02.050] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 02/18/2017] [Accepted: 02/20/2017] [Indexed: 12/27/2022]
Abstract
In our continued efforts to improve the potential utility of the α-methylene-γ-lactone scaffold, 62 new and 59 known natural α-methylenelactam analogues including α-methylene-γ-lactams, α-arylidene-γ and δ-lactams, and 3-arylideneindolin-2-ones were synthesized as the bioisosteric analogues of the α-methylenelactone scaffold. The results of antifungal and cytotoxic activity indicated that among these derivatives compound (E)-1-(2, 6-dichlorobenzyl)-3-(2-fluorobenzylidene) pyrrolidin-2-one (Py51) possessed good selectivity with the highest antifungal activity against Colletotrichum orbiculare with IC50 = 10.4 μM but less cytotoxic activity with IC50 = 141.2 μM (against HepG2 cell line) and 161.2 μM (against human hepatic L02 cell line). Ultrastructural change studies performed by transmission electron microscope showed that Py51 could cause important cell morphological changes in C. orbiculare, such as plasma membrane detached from cell wall, cell wall thickening, mitochondria disruption, a dramatic increase in vacuolation, and eventually a complete loss in the integrity of organelles. Significantly, mitochondria appeared one of the primary targets, as confirmed by their remarkably aberrant morphological changes. Analysis of structure-activity relationships revealed that incorporation of the aryl group into the α-exo-methylene and the N-benzyl substitution increased the activity. Meanwhile, the α-arylidene-γ-lactams have superiority in selectivity over the 3-arylideneindolin-2-ones. Based on the results, the N-benzyl substituted α-(2-fluorophenyl)-γ-lactam was identified as the most promising natural-based scaffold for further discovering and developing improved crop-protection agents.
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Affiliation(s)
- Wang Delong
- Research & Development Center of Biorational Pesticide, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Northwest A&F University, Yangling 712100, China
| | - Wang Lanying
- Research & Development Center of Biorational Pesticide, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Northwest A&F University, Yangling 712100, China; College of Environment and Plant Protection, Hainan University, Haikou, Hainan, 570228, China
| | - Wu Yongling
- Research & Development Center of Biorational Pesticide, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Northwest A&F University, Yangling 712100, China
| | - Song Shuang
- Research & Development Center of Biorational Pesticide, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Northwest A&F University, Yangling 712100, China
| | - Feng Juntao
- Research & Development Center of Biorational Pesticide, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Northwest A&F University, Yangling 712100, China.
| | - Zhang Xing
- Research & Development Center of Biorational Pesticide, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Northwest A&F University, Yangling 712100, China
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Bi Y, Yu Z. Diterpenoids from Streptomyces sp. SN194 and Their Antifungal Activity against Botrytis cinerea. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:8525-8529. [PMID: 27794606 DOI: 10.1021/acs.jafc.6b03645] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Botrytis cinerea is a serious phytopathogen affecting a wide range of crops around the world. Many fungicides targeting Botrytis cinerea have failed due to the pathogen's genetic plasticity. In an effort to search for new fungicides from natural products, two new diterpenoids, named chloroxaloterpin A, 1, and B, 2, were isolated from culture broth of Streptomyces sp. SN194 along with four known diterpenoids, viguiepinol, 3, and oxaloterpins C-E, 4-6. Their structures were elucidated based on extensive MS, NMR, and X-ray crystallography analyses. Both the [(2-chlorophenyl)amino]carbonyl carbanic acyl group in 1 and the 2-[(2-chlorophenyl)amino]-2-oxo-acetyl group in 2 are discovered in natural products for the first time. All six compounds were tested against Botrytis cinerea, and chloroxaloterpin A, 1, and B, 2, demonstrated strong inhibitory activity against spore germination with EC50 of 4.40 and 4.96 μg/mL, respectively.
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Affiliation(s)
- Yuhui Bi
- College of Plant Protection, Shenyang Agricultural University , Shenyang 110866, People's Republic of China
| | - Zhiguo Yu
- College of Plant Protection, Shenyang Agricultural University , Shenyang 110866, People's Republic of China
- Engineering & Technological Research Center of Biopesticide for Liaoning Province , Shenyang 110866, People's Republic of China
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Synthesis and Antitumor Evaluation of Novel 5-Hydrosulfonyl-1H-benzo[d]imidazol-2(3H)-one Derivatives. Molecules 2016; 21:516. [PMID: 27104509 PMCID: PMC6273811 DOI: 10.3390/molecules21040516] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 03/21/2016] [Accepted: 03/31/2016] [Indexed: 02/05/2023] Open
Abstract
A series of novel 5-hydrosulfonyl-1H-benzo[d]imidazol-2(3H)-one derivatives bearing natural product substructures has been successfully synthesized and their antitumor activity studied. These newly synthesized derivatives were characterized by ¹H-NMR, (13)C-NMR and high resolution mass spectral data, then screened as antitumor agents against the A549, HCC1937, and MDA-MB-468 human tumor cell lines using MTT cell proliferation assays. The results show that some of these compounds can effectively inhibit the growth of these cancerous cells, with compound 5b being the best one (IC50 = 2.6 μM). Flow cytometry data revealed that compound 5b induced apoptosis of HCC1937 cells with increased solution concentration. The structure and activity relationships (SAR) of these compounds is summarized.
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New α-Methylene-γ-Butyrolactone Derivatives as Potential Fungicidal Agents: Design, Synthesis and Antifungal Activities. Molecules 2016; 21:130. [PMID: 26805804 PMCID: PMC6273913 DOI: 10.3390/molecules21020130] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 01/18/2016] [Accepted: 01/19/2016] [Indexed: 12/18/2022] Open
Abstract
In consideration of the fact that the α-methylene-γ-butyrolactone moiety is a major bio-functional group in the structure of carabrone and possesses some agricultural biological activity, forty-six new ester and six new ether derivatives containing α-methylene-γ-butyrolactone moieties were synthesized, and their fungicidal activities against Colletotrichum lagenarium and Botrytis cinerea were investigated. Most of the synthesized compounds showed moderate to significant fungicidal activity. Among them, halogen atom-containing derivatives showed better activity than others, especially compounds 6a,d which exhibited excellent fungicidal activity against C. lagenarium, with IC50 values of 7.68 and 8.17 μM. The structure-activity relationship (SAR) analysis indicated that ester derivatives with electron-withdrawing groups on the benzene ring showed better fungicidal activity than those with electron-donating groups. A quantitative structure-activity relationship (QSAR) model (R2 = 0.9824, F = 203.01, S2 = 0.0083) was obtained through the heuristic method. The built model revealed a strong correlation of fungicidal activity against C. lagenarium with the molecular structures of these compounds. These results are expected to prove helpful in the design and exploration of low toxicity and high efficiency α-methylene-γ-butyrolactone-based fungicides.
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Wang D, Ren S, Wang H, Yan H, Feng J, Zhang X. Semisynthesis and Antifungal Activity of Novel Oxime Ester Derivatives of Carabrone Modified at C(4) againstBotrytis cinerea. Chem Biodivers 2014; 11:886-903. [DOI: 10.1002/cbdv.201300212] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Indexed: 11/06/2022]
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Synthesis, antifungal activities and qualitative structure activity relationship of carabrone hydrazone derivatives as potential antifungal agents. Int J Mol Sci 2014; 15:4257-72. [PMID: 24619221 PMCID: PMC3975396 DOI: 10.3390/ijms15034257] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 02/24/2014] [Accepted: 03/04/2014] [Indexed: 11/17/2022] Open
Abstract
Aimed at developing novel fungicides for relieving the ever-increasing pressure of agricultural production caused by phytopathogenic fungi, 28 new hydrazone derivatives of carabrone, a natural bioactive sesquisterpene, in three types were designed, synthesized and their antifungal activities against Botrytis cinerea and Colletotrichum lagenarium were evaluated. The result revealed that all the derivatives synthesized exhibited considerable antifungal activities in vitro and in vivo, which led to the improved activities for carabrone and its analogues and further confirmed their potential as antifungal agents.
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New antifungal scaffold derived from a natural pharmacophore: synthesis of α-methylene-γ-butyrolactone derivatives and their antifungal activity against Colletotrichum lagenarium. Bioorg Med Chem Lett 2013; 23:4393-7. [PMID: 23777779 DOI: 10.1016/j.bmcl.2013.05.073] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Revised: 05/17/2013] [Accepted: 05/21/2013] [Indexed: 11/23/2022]
Abstract
Thirty new and thirty-four known analogues were designed and synthesized to improve the potential use of the α-methylene-γ-butyrolactone ring, a natural pharmacophore. All structures were confirmed by (1)H and (13)C NMR, MS, and single-crystal X-ray diffraction analyses. The results of antifungal and cytotoxic activity indicated that the synthesized analogues showed significant inhibitory activity and limited selectivity. Compound 45 exhibited the highest antifungal activity with IC₅₀=22.8 μM but moderate cytotoxic activity with IC₅₀=28.5 μM (against BGC823 cell line) and 7.7 μM (against HeLa cell line). Analysis of structure-activity relationships revealed that the incorporation of an aromatic ring into the β, γ positions of the lactone ring improved antifungal activity, and that the introduction of electron-withdrawing groups into the aromatic rings increased the activity compared with electron-donating groups. The above results identified 4-phenyl-3-phenyl-2-methylenebutyrolactone (33) as a lead scaffold for discovering and developing novel and improved crop-protection agents.
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Xu N, Yang C, Gan X, Wei S, Ji Z. Synthesis of 1-isopropyl-3-acyl-5-methyl-benzimidazolone derivatives and their antimicrobial activity. Int J Mol Sci 2013; 14:6790-804. [PMID: 23531538 PMCID: PMC3645665 DOI: 10.3390/ijms14046790] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 03/06/2013] [Accepted: 03/08/2013] [Indexed: 11/16/2022] Open
Abstract
A series of N-acylated analogues of 1-isopropyl-3-acyl-5-methyl-benzimidazolone were synthesized. Bioassay results indicated that analogues 5-07 and 5-19 exhibited the most potency against Bacillus cereus, Bacillus subtilis, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa. Analogues 5-02, 5-07, 5-12, 5-15, 5-19, 5-20 and 5-25 could effectively inhibit the spore germination of Botrytis cinerea. The relationship between structure and their antimicrobial activity (SAR) has also been discussed according to aliphatic acids and aromatic acids derivatives, respectively. This implied that the N-acylated derivatives of 5-methyl-benzimidazolone might be potential antimicrobial agents.
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Affiliation(s)
- Nan Xu
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China.
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Feng JT, Wang H, Ren SX, He J, Liu Y, Zhang X. Synthesis and antifungal activities of carabrol ester derivatives. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:3817-3823. [PMID: 22443262 DOI: 10.1021/jf205123d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Thirty-eight new ester derivatives of carabrol were designed, synthesized, and characterized by (1)H and (13)C NMR and HR-ESI-MS. Their antifungal activities against the fungal pathogen Colletotrichum lagenarium were evaluated using a spore germination assay. Of these 38 ester derivatives, 16 showed higher antifungal activity than that of carabrol and 7 showed higher antifungal activity than that of carabrone. It was found that the C-4 position of carabrol was a key position involving its antifungal activity, which showed the variation of 50% inhibition concentration (IC(50)) from 2.70 to 52.33 μg/mL. When substituted by the phenyl ring, the ester derivatives with electron-attracting groups showed higher activity than those with electron-donating ones. Two ester derivatives, carabryl 4-cynaobenzoate (II-17, IC(50) 2.70 μg/mL) and carabryl 4-isopropylbenzoate (II-27, IC(50) 2.82 μg/mL), showed only slightly lower antifungal activity than that of the positive control chlorothalonil (IC(50) 0.87 μg/mL) and have been identified as promising leads for development of new environmentally friendly fungicides.
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Affiliation(s)
- Jun-Tao Feng
- Research & Development Center of Biorational Pesticide, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Northwest A&F University, Yangling, China
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Wei S, Wu W, Ji Z. Synthesis and antibacterial activities of 1-alkyl-3-methacryloyl (acryloyl) of benzimidazolone (thione) derivatives. Int J Mol Sci 2012; 13:4819-4830. [PMID: 22606011 PMCID: PMC3344247 DOI: 10.3390/ijms13044819] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 03/24/2012] [Accepted: 04/06/2012] [Indexed: 11/25/2022] Open
Abstract
A series of (28) 1-alkyl-3-methacryloyl (acryloyl)-benzimidazolone (thione) deriv-atives were synthesized. The structures of the new derivatives were confirmed by 1H-NMR, 13C-NMR and ESI-MS spectral analysis. The antibacterial activities of these compounds against several strains of bacteria, such as Bacillus cereus, Bacillus subtilis, Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa, were evaluated by methods of paper disc-diffusion and broth mciro-dilution. Methacryloyl derivatives displayed higher antibacterial activities against tested bacterial strains than those of acryloyl derivatives in in vitro tests. A structure-activity relationship (SAR) study revealed that the presences of the methacryloyl moieties is essential to the antibacterial activities of the compounds.
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Affiliation(s)
| | | | - Zhiqin Ji
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-029-87092191; Fax: +86-029-87093987
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Surfactants Based on Bis-Galactobenzimidazolones: Synthesis, Self-Assembly and Ion Sensing Properties. J SURFACTANTS DETERG 2011. [DOI: 10.1007/s11743-011-1262-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Saber A, Zouihri H, Essassi EM, Ng SW. 1-Isopropenyl-1H-1,3-benzimidazol-2(3H)-one. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o1409. [PMID: 21579488 PMCID: PMC2979410 DOI: 10.1107/s1600536810017897] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Accepted: 05/14/2010] [Indexed: 11/10/2022]
Abstract
In the title N-substituted benzimidazol-2-one, C(10)H(10)N(2)O, the fused ring system is almost planar (r.m.s. deviation = 0.01 Å) and aligned at 57.9 (1)° with respect to the propenyl fragment. In the crystal, adjacent mol-ecules are linked by pairs of N-H⋯O hydrogen bonds into inversion dimers.
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