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Alzaidi O, Wirth T. Continuous Flow Electroselenocyclization of Allylamides and Unsaturated Oximes to Selenofunctionalized Oxazolines and Isoxazolines. ACS ORGANIC & INORGANIC AU 2024; 4:350-355. [PMID: 38855333 PMCID: PMC11157512 DOI: 10.1021/acsorginorgau.4c00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 02/22/2024] [Accepted: 02/26/2024] [Indexed: 06/11/2024]
Abstract
The synthesis of selenofunctionalized oxazolines and isoxazolines from N-allyl benzamides and unsaturated oximes with diselenides was studied by utilizing a continuous flow electrochemical approach. At mild reaction conditions and short reaction times of 10 min product yields of up to 90% were achieved including a scale-up reaction. A broad substrate scope was studied and the reaction was shown to have a wide functional group tolerance.
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Affiliation(s)
- Ohud Alzaidi
- School
of Chemistry, Cardiff University, Park Place, Main Building, Cardiff CF10 3AT, U.K.
- Department
of Chemistry, College of Science –
Al Khurma, Taif University, P.O. Box
11099, Taif 21944, Saudi Arabia
| | - Thomas Wirth
- School
of Chemistry, Cardiff University, Park Place, Main Building, Cardiff CF10 3AT, U.K.
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2
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Huang Y, Peng X, Chen J, Shu L, Zhang M, Jin J, Jin Z, Chi YR. Discovery of Novel Chiral Indole Derivatives Containing the Oxazoline Moiety as Potential Antiviral Agents for Plants. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:6979-6987. [PMID: 38520352 DOI: 10.1021/acs.jafc.4c00119] [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: 03/25/2024]
Abstract
Potato virus Y (PVY) is an important plant virus that has spread worldwide, causing significant economic losses. To search for novel structures as potent antiviral agents, a series of chiral indole derivatives containing oxazoline moieties were designed and synthesized and their anti-PVY activities were evaluated. Biological activity tests demonstrated that many chiral compounds exhibited promising anti-PVY activities and that their absolute configurations exhibited obvious distinctions in antiviral bioactivities. Notably, compound (S)-4v displayed excellent curative and protective efficacy against PVY, with EC50 values of 328.6 and 256.1 μg/mL, respectively, which were superior to those of commercial virucide ningnanmycin (NNM, 437.4 and 397.4 μg/mL, respectively). The preliminary antiviral mechanism was investigated to determine the difference in antiviral activity between the two enantiomers of 4v chiral compounds. Molecular docking indicated a stronger binding affinity between the coating proteins of PVY (PVY-CP) and (S)-4v (-6.5 kcal/mol) compared to (R)-4v (-6.2 kcal/mol). Additionally, compound (S)-4v can increase the chlorophyll content and defense-related enzyme activities more effectively than its enantiomer. Therefore, this study provides an important basis for the development of chiral indole derivatives containing oxazoline moieties as novel agricultural chemicals.
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Affiliation(s)
- Yixian Huang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, People's Republic of China
| | - Xiaolin Peng
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, People's Republic of China
| | - Jinli Chen
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, People's Republic of China
| | - Liangzhen Shu
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, People's Republic of China
| | - Meng Zhang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, People's Republic of China
| | - Jiamiao Jin
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, People's Republic of China
| | - Zhichao Jin
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, People's Republic of China
| | - Yonggui Robin Chi
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, People's Republic of China
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
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3
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Lindig A, Schwarz J, Hubmann G, Rosenthal K, Lütz S. Bivariate One Strain Many Compounds Designs Expand the Secondary Metabolite Production Space in Corallococcus coralloides. Microorganisms 2023; 11:2592. [PMID: 37894250 PMCID: PMC10609524 DOI: 10.3390/microorganisms11102592] [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: 09/21/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
The scarcely investigated myxobacterium Corallococcus coralloides holds a large genome containing many uncharacterized biosynthetic gene clusters (BGCs) that potentially encode the synthesis of entirely new natural products. Despite its promising genomic potential, suitable cultivation conditions have not yet been found to activate the synthesis of new secondary metabolites (SMs). Finding the right cultivation conditions to activate BGCs in the genome remains a major bottleneck, and its full biosynthetic potential has so far not been determined. We therefore applied a bivariate "one strain many compounds" (OSMAC) approach, using a combination of two elicitor changes at once, for the activation of BGCs and concomitant SM production by C. coralloides. The screening was carried out in Duetz-System 24-well plates, applying univariate and bivariate OSMAC conditions. We combined biotic additives and organic solvents with a complex growth medium for univariate conditions and with minimal medium for bivariate conditions. The success in the activation of BGCs was evaluated by determining the number of new mass features detected in the respective extracts. We found synergistic effects in the bivariate OSMAC designs, evidenced by the detection of completely new mass features in the bivariate OSMAC experiments, which were not detected in the univariate OSMAC designs with only one elicitor. Overall, the bivariate OSMAC screening led to 55 new mass features, which were not detected in the univariate OSMAC design. Molecular networks revealed that these new mass features embody potential novel natural compounds and chemical derivatives like the N-acyl fatty amine N-pentyloctadecanamide and possibly sulfur-containing natural products. Hence, the presence of multiple elicitors in the bivariate OSMAC designs successfully activated the biosynthetic potential in C. coralloides. We propose bivariate OSMAC designs with a complex combination of elicitors as a straightforward strategy to robustly expand the SM space of microorganisms with large genomes.
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Affiliation(s)
- Anton Lindig
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Jenny Schwarz
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Georg Hubmann
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Katrin Rosenthal
- School of Science, Constructor University, 28759 Bremen, Germany;
| | - Stephan Lütz
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Straße 66, 44227 Dortmund, Germany
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4
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Xue F, Yang CJ, Tang T, He Z. Sequential annulation and isomerisation reaction of 3-acylmethylidene oxindoles with Huisgen zwitterions and synthesis of 5-(3-oxindolyl)oxazoles. Org Biomol Chem 2023; 21:8176-8181. [PMID: 37786314 DOI: 10.1039/d3ob01199b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Herein, we report a facile synthesis of 5-(3-oxindolyl)oxazole derivatives via a sequential annulation and isomerisation reaction of 3-acylmethylidene oxindoles with in situ generated Huisgen zwitterions (HZs) from PPh3 and azodicarboxylates. This reaction exhibits good functional group tolerance with 30 examples of structurally diverse products prepared with moderate to good efficiencies (up to 88% yield), thus providing a generally applicable route to the biologically important 5-(3-indolyl)oxazole structural motifs. Key to the success of this sequential one-pot strategy is the utilization of DBU as a base to promote the isomerisation process of the corresponding intermediate annulation products.
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Affiliation(s)
- Feixue Xue
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
| | - Chang-Jiang Yang
- Department of Chemistry, School of Sciences, Great Bay University, Dongguan 523000, China
- The Dongguan Key Laboratory for Data Science and Intelligent Medicine, Dongguan 523000, China.
| | - Tong Tang
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
| | - Zhengjie He
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
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5
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Cheng L, Liu JR, Liu JM, Guo D, Deng F, Bian Q, Zhang H, Han X, Ali AS, Zhang WH, Zhang MZ, Gu YC. Design, synthesis, antifungal activity and molecular docking of ring-opened pimprinine derivative containing (thio)amide structure. PEST MANAGEMENT SCIENCE 2023; 79:2220-2229. [PMID: 36750400 DOI: 10.1002/ps.7400] [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: 01/05/2023] [Revised: 01/30/2023] [Accepted: 02/08/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND To obtain new environmentally friendly fungicides, we used the natural product pimprinine as the lead compound, and designed and synthesized two series of ring-opening derivatives of pimprinine containing amide/thioamide. We then studied their antifungal activity against six common plant pathogenic fungi in vitro. RESULTS Most of the target compounds have good antifungal activity against six important plant pathogenic fungi in vitro. At a concentration of 50 μg ml-1 , compound 3o showed prominent antifungal effects on Alternaria solani and Rhioctornia solani, with inhibition rates of 91.8% and 97.4%, and a 50% effective concentration (EC50 ) of 6.2255 and 0.6969 μg ml-1 respectively. The EC50 of compound 3o against Alternaria solani was significantly lower than that of boscalid (13.0380 μg ml-1 ) and flutriafol (11.9057 μg ml-1 ). In addition, compound 3o had good antifungal activity against Sclerotinia sclerotiorum, cucumber powdery mildew, cucumber Botrytis cinerea and Phytophthora capsici in vivo; the antifungal activity of compound 3o against cucumber Botrytis cinerea is 91.7%. At the same time, docking results for highly active compound 3o with the presumed target succinate dehydrogenase and the molecular docking prediction scores of all compounds further indicate its possible antifungal activity mechanism. CONCLUSION The designed and optimized derivative 3o of ring-opening pimprinine has good antifungal activity and can be used as a new antifungal drug for further research. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Lan Cheng
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jing-Rui Liu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jia-Mu Liu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, China
| | - Dale Guo
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fang Deng
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Qiang Bian
- National Pesticide Engineering Research Center (Tianjin), College of Chemistry, Nankai University, Tianjin, China
| | - Haifeng Zhang
- Department of Plant Pathology, College of Plant Protection, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing Agricultural University, Nanjing, China
| | - Xinya Han
- School of Chemistry & Chemical Engineering, Anhui University of Technology, Ma'anshan, China
| | - Abdallah S Ali
- Department of Microbiology, Faculty of Agriculture, Cairo University, Giza, Egypt
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, China
| | - Ming-Zhi Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yu-Cheng Gu
- Syngenta Jealott's Hill International Research Centre, Bracknell, RG42 6EY, UK
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Huang DC, He Z, Guo D, Deng F, Bian Q, Zhang H, Ali AS, Zhang MZ, Zhang WH, Gu YC. Discovery of Novel Benzoxaborole-Containing Streptochlorin Derivatives as Potential Antifungal Agents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:6226-6235. [PMID: 37053087 DOI: 10.1021/acs.jafc.2c08053] [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: 05/03/2023]
Abstract
Streptochlorin is a kind of indole alkaloid derived from marine microorganisms. It is a promising lead compound due to its potent bioactivity in preventing many phytopathogens, as shown in our previous study. To explore the potential applications of this natural product, a series of novel benzoxaborole-containing streptochlorin derivatives were designed and synthesized through a one-step and catalyst-free reaction in water at room temperature. All target compounds were first screened for their antifungal profiles in vitro against six common phytopathogenic fungi. The results of bioassay revealed that most of the designed compounds exhibited more significant antifungal activities against Botrytis cinrea, Gibberella zeae, Rhizoctorzia solani, Colletotrichum lagenarium, and alternaria leaf spot under the concentration of 50 μg/mL, and this is highlighted by compounds 4i and 5f, which demonstrated impressive antifungal effects against G. zeae and R. solani, with their corresponding EC50 values 0.2983 and 0.2657 μg/mL, which are obviously better than positive control flutriafol and boscalid (5.2606 and 1.2048 μg/mL, respectively). Scanning electron microscopy on the hyphae morphology showed that compound 5b might cause mycelial abnormalities of G. zeae. 3D-QSAR studies of CoMFA and CoMSIA were carried out on 29 target compounds with antifungal activity against B. cinrea. The analysis results indicated that introducing appropriate electronegative groups at the 5-position of benzoxaborole and the 4,5-positions of the indole ring could effectively improve the anti-B. cinrea activity. Moreover, compound 5b showed good antifungal activities in vivo against Phytophthora capsici. Molecular docking was further explored to ascertain the practical value of the active compound as a potential inhibitor of LeuRS. The abovementioned results indicate that the designed benzoxaborole-containing streptochlorin derivatives could be further studied as template molecules of novel antifungal agents.
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Affiliation(s)
- Dai-Chuan Huang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhuo He
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Dale Guo
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Fang Deng
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Qiang Bian
- National Pesticide Engineering Research Center (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Haifeng Zhang
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, and Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China
| | - Abdallah S Ali
- Department of Microbiology, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - Ming-Zhi Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yu-Cheng Gu
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K
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7
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Wang S, Ma SJ, Lou JC, Sun WW, Wu B. Copper-Catalyzed [3 + 2] Cycloaddition Reaction of N-Hydroxysuccinimide Ester with Isocyanoacetates for the Synthesis of 4,5-Disubstituted Oxazoles. J Org Chem 2023; 88:4481-4493. [PMID: 36918373 DOI: 10.1021/acs.joc.2c03084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
The cycloaddition reaction of N-hydroxysuccinimide ester and isocyanatoacetate catalyzed by copper was described. A series of 4,5-disubstituted oxazole compounds, including ones derived from natural fatty acids, drugs, amino acids, and peptides, were obtained in moderate to high yields. The derivatization reaction was explored. The reaction mechanism was discussed.
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Affiliation(s)
- Shuo Wang
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, China
| | - Shi-Jie Ma
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, China
| | - Ji-Cong Lou
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, China
| | - Wen-Wu Sun
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, China
| | - Bin Wu
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, China.,Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, South-Central Minzu University, Wuhan 430074, China
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8
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Winter C, Siepe I, Wise A, Dorali A, Barrett AGM, Witschel M. Agrochemical Lessons for Infectious Disease Research: New Resistance Breaking Antifungal Hits against Candida auris. ACS Med Chem Lett 2023; 14:136-140. [PMID: 36793433 PMCID: PMC9923843 DOI: 10.1021/acsmedchemlett.2c00497] [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: 11/29/2022] [Accepted: 01/16/2023] [Indexed: 01/26/2023] Open
Abstract
Analysis of the history of the invention of the block-buster antifungal drug Fluconazole underscores the importance of agrochemical research on drug discovery and development. The multidrug resistant fungal pathogen Candida auris is now responsible for serious morbidity and mortality among immuno-compromised and long-term resident hospital patients globally. New drugs against C. auris are urgently needed. A focused screening of 1487 fungicides from the BASF agrochemical collection gave several potent inhibitors of C. auris with yet noncommercialized modes of action. The hits showed only minor activity loss against the azole-resistant C. auris strain CDC 0385 and low to moderate cytotoxicity to human HepG2 cells. Aminopyrimidine 4 showed high activity against resistant strains and selectivity in a HepG2 cells assay and is a potential hit candidate for further optimization.
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Affiliation(s)
| | | | - Andrew Wise
- Evotec, Alderley
Park, Cheshire SK10 4TG, U.K.
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9
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Design, Synthesis, Antifungal Activity, and Molecular Docking of Streptochlorin Derivatives Containing the Nitrile Group. Mar Drugs 2023; 21:md21020103. [PMID: 36827144 PMCID: PMC9958711 DOI: 10.3390/md21020103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 01/28/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
Based on the structures of natural products streptochlorin and pimprinine derived from marine or soil microorganisms, a series of streptochlorin derivatives containing the nitrile group were designed and synthesized through acylation and oxidative annulation. Evaluation for antifungal activity showed that compound 3a could be regarded as the most promising candidate-it demonstrated over 85% growth inhibition against Botrytis cinerea, Gibberella zeae, and Colletotrichum lagenarium, as well as a broad antifungal spectrum in primary screening at the concentration of 50 μg/mL. The SAR study revealed that non-substituent or alkyl substituent at the 2-position of oxazole ring were favorable for antifungal activity, while aryl and monosubstituted aryl were detrimental to activity. Molecular docking models indicated that 3a formed hydrogen bonds and hydrophobic interactions with Leucyl-tRNA Synthetase, offering a perspective for the possible mechanism of action for antifungal activity of the target compounds.
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10
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Yuan M, Tian Z, Yin X, Yuan X, Gao J, Yuan W, Lu A, Wang Z, Li L, Wang Q. Structural Optimization of the Natural Product: Discovery of Almazoles C-D and Their Derivatives as Novel Antiviral and Anti-phytopathogenic Fungus Agents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:15693-15702. [PMID: 36479881 DOI: 10.1021/acs.jafc.2c05898] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Plant diseases seriously affect the growth of crops and the quality and yield of agricultural products. The search for plant-derived pesticide candidates based on natural products is a hot topic of current research. Marine natural products almazoles C-D were efficiently prepared and selected as the lead compounds in this work. Two series of almazole derivatives were designed and synthesized, and their antiviral and fungicidal activities were systematically evaluated. The results of anti-tobacco mosaic virus (anti-TMV) activity showed that almazoles C-D and their derivatives had good anti-TMV activities. Compounds 6, 15, 16a, 16b, 16g, 16l, 16n, 20a, 20d, 20i, and 20n exhibited better anti-TMV activities than the commercial antiviral agent ribavirin. Anti-TMV mechanism studies showed that compound 16b could induce the polymerization of 20S CP (coat protein, CP), thereby affecting the assembly of TMV virus particles. Molecular docking results showed that compounds 15, 16b, and 20n could combine with amino acid residues through hydrogen bonds to achieve an excellent anti-TMV effect. In addition, most of the almazole derivatives were found to have broad-spectrum fungicidal activities against eight kinds of plant pathogens (Fusarium oxysporum f. sp. cucumeris, Cercospora arachidicola Hori, Physalospora piricola, Rhizoctonia cerealis, Alternaria solani, Pyricularia grisea, Phytophthora capsici, and Sclerotinia sclerotiorum). This study provides an important evidence for the research and development of almazole alkaloids containing indole and oxazole structural groups as novel agrochemicals.
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Affiliation(s)
- Meiling Yuan
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Zhaoyong Tian
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Xiangyang Yin
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Xinyu Yuan
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Jixuan Gao
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Wenying Yuan
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Aidang Lu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Ziwen Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Liang Li
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
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11
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Discovery of Novel Pimprinine and Streptochlorin Derivatives as Potential Antifungal Agents. Mar Drugs 2022; 20:md20120740. [PMID: 36547887 PMCID: PMC9787289 DOI: 10.3390/md20120740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022] Open
Abstract
Pimprinine and streptochlorin are indole alkaloids derived from marine or soil microorganisms. In our previous study, they were promising lead compounds due to their potent bioactivity in preventing many phytopathogens, but further structural modifications are required to improve their antifungal activity. In this study, pimprinine and streptochlorin were used as parent structures with the combination strategy of their structural features. Three series of target compounds were designed and synthesized. Subsequent evaluation for antifungal activity against six common phytopathogenic fungi showed that some of thee compounds possessed excellent effects, and this is highlighted by compounds 4a and 5a, displaying 99.9% growth inhibition against Gibberella zeae and Alternaria Leaf Spot under 50 μg/mL, respectively. EC50 values indicated that compounds 4a, 5a, 8c, and 8d were even more active than Azoxystrobin and Boscalid. SAR analysis revealed the relationship between 5-(3'-indolyl)oxazole scaffold and antifungal activity, which provides useful insight into the development of new target molecules. Molecular docking models indicate that compound 4a binds with leucyl-tRNA synthetase in a similar mode as AN2690, offering a perspective on the mode of action for the study of its antifungal activity. These results suggest that compounds 4a and 5a could be regarded as novel and promising antifungal agents against phytopathogens due to their valuable potency.
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12
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Synthesis of Novel Indole Schiff Base Compounds and Their Antifungal Activities. Molecules 2022; 27:molecules27206858. [PMID: 36296452 PMCID: PMC9609699 DOI: 10.3390/molecules27206858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/04/2022] [Accepted: 10/10/2022] [Indexed: 11/28/2022] Open
Abstract
A series of novel indole Schiff base derivatives (2a–2t) containing a 1,3,4-thiadiazole scaffold modified with a thioether group were synthesized, and their structures were confirmed using FT-IR, 1H NMR, 13C NMR, and HR-MS. In addition, the antifungal activity of synthesized indole derivatives was investigated against Fusarium graminearum (F. graminearum), Fusarium oxysporum (F. oxysporum), Fusariummoniliforme (F.moniliforme), Curvularia lunata (C. lunata), and Phytophthora parasitica var. nicotiana (P. p. var. nicotianae) using the mycelium growth rate method. Among the synthesized indole derivatives, compound 2j showed the highest inhibition rates of 100%, 95.7%, 89%, and 76.5% at a concentration of 500 μg/mL against F. graminearum, F. oxysporum, F.moniliforme, and P. p. var. nicotianae, respectively. Similarly, compounds 2j and 2q exhibited higher inhibition rates of 81.9% and 83.7% at a concentration of 500 μg/mL against C. lunata. In addition, compound 2j has been recognized as a potential compound for further investigation in the field of fungicides.
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13
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Thakur A, Verma M, Bharti R, Sharma R. Oxazole and isoxazole: From one-pot synthesis to medical applications. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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14
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Oberheide A, Gaigne F, Arndt H. Divergent Synthesis of C5‐Heteroatom Substituted Oxazoles. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ansgar Oberheide
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldtstr. 10 D-07743 Jena Germany
| | - Frédéric Gaigne
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldtstr. 10 D-07743 Jena Germany
| | - Hans‐Dieter Arndt
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldtstr. 10 D-07743 Jena Germany
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15
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Unusual ring-opening reaction of 4-benzyl-5-methyl-2-aryloxazole N-oxides with POCl3. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Abazid AH, Hollwedel TN, Nachtsheim BJ. Stereoselective Oxidative Cyclization of N-Allyl Benzamides to Oxaz(ol)ines. Org Lett 2021; 23:5076-5080. [PMID: 34138574 DOI: 10.1021/acs.orglett.1c01607] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This study presents an enantioselective oxidative cyclization of N-allyl carboxamides via a chiral triazole-substituted iodoarene catalyst. The method allows the synthesis of highly enantioenriched oxazolines and oxazines, with yields of up to 94% and enantioselectivities of up to 98% ee. Quaternary stereocenters can be constructed and, besides N-allyl amides, the corresponding thioamides and imideamides are well tolerated as substrates, giving rise to a plethora of chiral 5-membered N-heterocycles. By applying a multitude of further functionalizations, we finally demonstrate the high value of the observed chiral heterocycles as strategic intermediates for the synthesis of other enantioenriched target structures.
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Affiliation(s)
- Ayham H Abazid
- University of Bremen, Institute of Organic and Analytical Chemistry, Leobener Straße 7, 28359 Bremen, Germany
| | - Tom-Niklas Hollwedel
- University of Bremen, Institute of Organic and Analytical Chemistry, Leobener Straße 7, 28359 Bremen, Germany
| | - Boris J Nachtsheim
- University of Bremen, Institute of Organic and Analytical Chemistry, Leobener Straße 7, 28359 Bremen, Germany
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17
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Li S, Lv M, Sun Z, Hao M, Xu H. Optimization of Osthole in the Lactone Ring: Structural Elucidation, Pesticidal Activities, and Control Efficiency of Osthole Ester Derivatives. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6465-6474. [PMID: 34077224 DOI: 10.1021/acs.jafc.1c01434] [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] [Indexed: 06/12/2023]
Abstract
Here, we prepared a series of novel osthole-type ester derivatives modified in the lactone ring of osthole, which is isolated from Cnidium monnieri. The positions of H-3 and H-4 of the representative compound 4z were determined by a 1H-1H COSY spectrum. By opening the lactone ring of osthole, the double bonds at the C-3 and C-4 positions of diol 3 and esters 4a-4z, 4a', and 4b' were still retained as a Z configuration. That is, H-3 and H-4 of compounds 3 and 4a-4z, 4a', and 4b' were all in the cis relationship. The steric configurations of 4k, 4v, and 4z were further undoubtedly determined by single-crystal X-ray diffraction. Against Tetranychus cinnabarinus Boisduval, four aliphatic esters 4c (R = n-C3H7; LC50: 0.31 mg/mL), 4d (R = CH3(CH2)10; LC50: 0.24 mg/mL), 4a' (R = CH3(CH2)9; LC50: 0.28 mg/mL), and 4b' (R = CH3(CH2)12; LC50: 0.32 mg/mL) showed the most promising acaricidal activity, and compounds 4c, 4d, and 4a' also exhibited a potent control efficiency. Especially, compound 4d exhibited greater than fivefold acaricidal activity of the precursor osthole (LC50: 1.22 mg/mL). Against Mythimna separata Walker, compounds 4g, 4l, and 4m displayed 1.6-1.8-fold potent insecticidal activity of osthole. It demonstrated that the lactone ring of osthole is not necessary for the agricultural activities, thiocarbonylation of osthole was not beneficial for the agricultural activities, introduction of R as an aliphatic chain is vital for the acaricidal activity, notably, the length of the aliphatic chain is related to the acaricidal activity, 4d could be further studied as a lead acaricidal agent, and to the aromatic series, R containing the fluorine atom(s) is important for the insecticidal activity.
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Affiliation(s)
- Shaochen Li
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi Province, China
| | - Min Lv
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi Province, China
| | - Zhiqiang Sun
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi Province, China
| | - Meng Hao
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi Province, China
| | - Hui Xu
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi Province, China
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18
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Two new dipimprinine alkaloids from soil-derived Streptomyces sp. 44414B. J Antibiot (Tokyo) 2021; 74:474-476. [PMID: 34021266 DOI: 10.1038/s41429-021-00424-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 05/07/2021] [Accepted: 05/09/2021] [Indexed: 11/08/2022]
Abstract
Two new dipimprinine alkaloids dipimprinine E (1) and dipimprinine F (2) were isolated from Streptomyces sp. 44414B. The structure was elucidated by extensive spectroscopic analysis, including ESI-MS, HR-MS, and 1D and 2D NMR experiments. Dipimprinines F (2) showed cytotoxic activities against three tumor cell lines, including A-875, Hep G2, and H-460, with IC50 values of 26.4, 0.5, and 9.0 μg ml-1, respectively.
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19
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Zhang S, Zhang L, Zhu J, Chen H, Chen Z, Si T, Liu T. Genomic and Metabolomic Investigation of a Rhizosphere Isolate Streptomyces netropsis WLXQSS-4 Associated with a Traditional Chinese Medicine. Molecules 2021; 26:molecules26082147. [PMID: 33917975 PMCID: PMC8068340 DOI: 10.3390/molecules26082147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/01/2021] [Accepted: 04/04/2021] [Indexed: 11/21/2022] Open
Abstract
Rhizosphere microorganisms play important ecological roles in promoting herb growth and producing abundant secondary metabolites. Studies on the rhizosphere microbes of traditional Chinese medicines (TCMs) are limited, especially on the genomic and metabolic levels. In this study, we reported the isolation and characterization of a Steptomyces netropsis WLXQSS-4 strain from the rhizospheric soil of Clematis manshurica Rupr. Genomic sequencing revealed an impressive total of 40 predicted biosynthetic gene clusters (BGCs), whereas metabolomic profiling revealed 13 secondary metabolites under current laboratory conditions. Particularly, medium screening activated the production of alloaureothin, whereas brominated and chlorinated pimprinine derivatives were identified through precursor-directed feeding. Moreover, antiproliferative activities against Hela and A549 cancer cell lines were observed for five compounds, of which two also elicited potent growth inhibition in Enterococcus faecalis and Staphylococcus aureus, respectively. Our results demonstrated the robust secondary metabolism of S. netropsis WLXQSS-4, which may serve as a biocontrol agent upon further investigation.
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Affiliation(s)
- Songya Zhang
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; (S.Z.); (J.Z.); (Z.C.)
| | - Lingxiao Zhang
- Department of Natural Products Chemistry, School of Pharmacy, China Medical University, Shenyang 110122, China; (L.Z.); (H.C.)
| | - Jing Zhu
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; (S.Z.); (J.Z.); (Z.C.)
| | - Hong Chen
- Department of Natural Products Chemistry, School of Pharmacy, China Medical University, Shenyang 110122, China; (L.Z.); (H.C.)
| | - Zhicong Chen
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; (S.Z.); (J.Z.); (Z.C.)
| | - Tong Si
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; (S.Z.); (J.Z.); (Z.C.)
- Correspondence: (T.S.); (T.L.)
| | - Tao Liu
- Department of Natural Products Chemistry, School of Pharmacy, China Medical University, Shenyang 110122, China; (L.Z.); (H.C.)
- Correspondence: (T.S.); (T.L.)
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20
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Oberheide A, Arndt H. Effective C5‐Arylation of Peptide‐Integrated Oxazoles: Almazole D. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ansgar Oberheide
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldstr. 10 D-07743 Jena
| | - Hans‐Dieter Arndt
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldstr. 10 D-07743 Jena
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21
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Gao Y, Huang DC, Liu C, Song ZL, Liu JR, Guo SK, Tan JY, Qiu RL, Jin B, Zhang H, Mulholland N, Han X, Xia Q, Ali AS, Guo D, Deng Y, Gu YC, Zhang MZ. Streptochlorin analogues as potential antifungal agents: Design, synthesis, antifungal activity and molecular docking study. Bioorg Med Chem 2021; 35:116073. [PMID: 33610010 DOI: 10.1016/j.bmc.2021.116073] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/05/2021] [Accepted: 02/06/2021] [Indexed: 12/22/2022]
Abstract
Streptochlorin is a small molecule of indole alkaloid isolated from marine Streptomyces sp., it is a promising lead compound due to its potent bioactivity in preventing many phytopathogens in our previous study, but further structural modifications are required to improve its antifungal activity. Our work in this paper focused on the replacement of oxazole ring in streptochlorin with the imidazole ring, to discover novel analogues. Based on this design strategy, three series of streptochlorin analogues were efficiently synthesized through sequential Vilsmeier-Haack reaction, Van Leusen imidazole synthesis and halogenation reaction. Some of the analogues displayed excellent activity in the primary assays, and this is highlighted by compounds 4g and 4i, the growth inhibition against Alternaria Leaf Spot and Rhizoctorzia solani under 50 μg/mL are 97.5% and 90.3%, respectively, even more active than those of streptochlorin, pimprinine and Osthole. Molecular docking models indicated that streptochlorin binds with Thermus thermophiles Leucyl-tRNA Synthetase in a similar mode to AN2690, offering a perspective on the mode of action study for antifungal activities of streptochlorin derivatives. Further study is still ongoing with the aim of discovering synthetic analogues, with improved antifungal activity and clear mode of action.
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Affiliation(s)
- Ya Gao
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Dai-Chuan Huang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Chang Liu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zi-Long Song
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jing-Rui Liu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Shu-Ke Guo
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jun-Yang Tan
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Run-Ling Qiu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Bing Jin
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Haifeng Zhang
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, and Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, China
| | - Nick Mulholland
- Syngenta Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Xinya Han
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Qinfei Xia
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Abdallah S Ali
- Department of Microbiology, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt
| | - Dale Guo
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Yun Deng
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Yu-Cheng Gu
- Syngenta Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom.
| | - Ming-Zhi Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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22
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Mueller LG, Chao A, Alwedi E, Natrajan M, Fleming FF. Oxazole Synthesis by Sequential Asmic-Ester Condensations and Sulfanyl-Lithium Exchange-Trapping. Org Lett 2021; 23:1500-1503. [PMID: 33533625 DOI: 10.1021/acs.orglett.1c00288] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Oxazoles are rapidly assembled through a sequential deprotonation-condensation of Asmic, anisylsulfanylmethylisocyanide, with esters followed by sulfanyl-lithium exchange-trapping. Deprotonating Asmic affords a metalated isocyanide that efficiently traps esters to afford oxazoles bearing a versatile C-4 anisylsulfanyl substituent. Interchange of the anisylsulfanyl substituent is readily achieved through a first-in-class sulfur-lithium exchange-electrophilic trapping sequence whose versatility is illustrated in the three-step synthesis of the bioactive natural product streptochlorin.
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Affiliation(s)
- Louis G Mueller
- Department of Chemistry, Drexel University, 32 South 32nd Street Philadelphia, Pennsylvania 19104, United States
| | - Allen Chao
- Wistar Institute, 3601 Spruce Street, Philadelphia, Pennsylvania 19104, United States
| | - Embarek Alwedi
- Merck Inc., 90 East Scott Avenue, Rahway, New Jersey 07065, United States
| | - Maanasa Natrajan
- Department of Chemistry, Drexel University, 32 South 32nd Street Philadelphia, Pennsylvania 19104, United States
| | - Fraser F Fleming
- Department of Chemistry, Drexel University, 32 South 32nd Street Philadelphia, Pennsylvania 19104, United States
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23
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First discovery of pimprinine derivatives and analogs as novel potential herbicidal, insecticidal and nematicidal agents. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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Mukku N, Madivalappa Davanagere P, Chanda K, Maiti B. A Facile Microwave-Assisted Synthesis of Oxazoles and Diastereoselective Oxazolines Using Aryl-Aldehydes, p-Toluenesulfonylmethyl Isocyanide under Controlled Basic Conditions. ACS OMEGA 2020; 5:28239-28248. [PMID: 33163807 PMCID: PMC7643254 DOI: 10.1021/acsomega.0c04130] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
In this study, a highly efficient two-component [3 + 2] cycloaddition reaction of substituted aryl aldehydes with 4-toluenesulfonylmethyl isocyanide (TosMIC) in the presence of 2 equiv of potassium phosphate as a base to 5-substituted oxazoles were established in a isopropanol medium under microwave irradiation. However, using 1 equiv of K3PO4 as a base resulted in the diastereoselective synthesis of 4,5-disubstituted oxazolines under identical reaction conditions. The foremost benefits of these protocols are the moderate-to-excellent yields with good functional group compatibility, simple experimental procedure, inexpensive readily available starting materials, nonchromatographic purification, and high bond-forming efficiency. The synthetic manipulation reported herein represents a cleaner route to the sustainable preparation of 5-substituted oxazoles and diastereoselective 4,5-disubstituted oxazolines derivatives.
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Affiliation(s)
- Narasimharao Mukku
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
| | | | - Kaushik Chanda
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
| | - Barnali Maiti
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
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25
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Ke S, Fang W, Huang W, Zhang Z, Shi L, Wan Z, Wang K, Cao C, Huang D. Sulfur-containing natural hinduchelins derivatives as potential antifungal agents against Rhizoctonia solani. Bioorg Med Chem Lett 2020; 30:127245. [PMID: 32389528 DOI: 10.1016/j.bmcl.2020.127245] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/28/2020] [Accepted: 05/02/2020] [Indexed: 01/06/2023]
Abstract
Aryl-oxazole alkaloids are an important class of heterocyclic natural products, and which has been demonstrated to exhibit broad biological functions. During the course of our research for highly active compounds from natural products, the natural hinduchelins A-D with typical aryl-oxazole unit have been synthesized and investigated. So, in order to develop highly potential functional molecules, a series of novel sulfur-containing aryl-oxazole compounds derived from natural hinduchelins was designed and synthesized, and their in vitro fungicidal activities against four common plant pathogenic fungi (oomycetes Phytophthora capsici, ascomycetes Sclerotinia sclerotiorum, deuteromycetes Botrytis cinerea and basidiomycetes Rhizoctonia solani) were evaluated, the results demonstrated that compounds 7b and 7c displayed good selectivity and specificity in vitro against basidiomycetes R. solani. In addition, the in vivo antifungal activities also indicated compounds 7b and 7c can protect the horsebean against infection by R. solani, and the possible mechanism of antifungal action for these compounds has also been investigated.
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Affiliation(s)
- Shaoyong Ke
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China.
| | - Wei Fang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Wenbo Huang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Zhigang Zhang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Liqiao Shi
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Zhongyi Wan
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Kaimei Wang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Chunxia Cao
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Daye Huang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China.
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26
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Wei C, Zhao L, Sun Z, Hu D, Song B. Discovery of novel indole derivatives containing dithioacetal as potential antiviral agents for plants. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 166:104568. [PMID: 32448422 DOI: 10.1016/j.pestbp.2020.104568] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 03/22/2020] [Accepted: 03/23/2020] [Indexed: 05/24/2023]
Abstract
Thirty unreported indole derivatives containing dithioacetal moiety were synthesized and evaluated for anti-plant viral activity. Bioassay results displayed that some of the target compounds showed better activities against tobacco mosaic virus (TMV) than the commercial Ribavirin in vivo. In particular, anti-TMV curative, protective and inactivating activity of 4p were 55.1, 57.2, and 80.3%, respectively, and EC50 value for inactivating activity was 88.5 μg/mL. The observation of transmission electron microscope showed that 4p may have a certain destructive effect on TMV particles. To further study, microscale thermophoresis analysis result also demonstrated that 4p powerfully interacted with TMV coat protein in vitro. Hence, this study provides a strong evidence suporting that indole derivatives might be applied as new antiviral agents.
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Affiliation(s)
- Chunle Wei
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Lei Zhao
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Zhongrong Sun
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Deyu Hu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China.
| | - Baoan Song
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China.
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27
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Zheng X, Liu W, Zhang D. Recent Advances in the Synthesis of Oxazole-Based Molecules via van Leusen Oxazole Synthesis. Molecules 2020; 25:molecules25071594. [PMID: 32244317 PMCID: PMC7180750 DOI: 10.3390/molecules25071594] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/19/2020] [Accepted: 03/23/2020] [Indexed: 11/25/2022] Open
Abstract
Oxazole compounds, including one nitrogen atom and one oxygen atom in a five-membered heterocyclic ring, are present in various biological activities. Due to binding with a widespread spectrum of receptors and enzymes easily in biological systems through various non-covalent interactions, oxazole-based molecules are becoming a kind of significant heterocyclic nucleus, which have received attention from researchers globally, leading them to synthesize diverse oxazole derivatives. The van Leusen reaction, based on tosylmethylisocyanides (TosMICs), is one of the most appropriate strategies to prepare oxazole-based medicinal compounds. In this review, we summarize the recent advances of the synthesis of oxazole-containing molecules utilizing the van Leusen oxazole synthesis from 1972, aiming to look for potential oxazole-based medicinal compounds, which are valuable information for drug discovery and synthesis.
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Affiliation(s)
- Xunan Zheng
- College of Chemistry, Jilin University, Changchun 130012, China;
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Wei Liu
- Department of Pesticide Science, Plant Protection College, Shenyang Agricultural University, Shenyang 110866, China
- Correspondence: (W.L.); (D.Z.); Tel.: +86-188-1775-2588 (W.L.); +86-431-8783-6471 (D.Z.)
| | - Dawei Zhang
- College of Chemistry, Jilin University, Changchun 130012, China;
- Correspondence: (W.L.); (D.Z.); Tel.: +86-188-1775-2588 (W.L.); +86-431-8783-6471 (D.Z.)
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28
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Yu Z, Jiang H, Wang L, Yang FX, Huang JP, Liu C, Guo X, Xiang W, Huang SX. Dimeric Pimprinine Alkaloids From Soil-Derived Streptomyces sp. NEAU-C99. Front Chem 2020; 8:95. [PMID: 32133345 PMCID: PMC7040024 DOI: 10.3389/fchem.2020.00095] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 01/31/2020] [Indexed: 02/05/2023] Open
Abstract
Six new pimprinine alkaloids (1–6), including four dimers, dipimprinines A–D (1–4), and two monomers, (±)-Pimprinol D (5), and pimprinone A (6), along with six known congeners (7–12), were isolated from a soil-derived actinomycete Streptomyces sp. NEAU-C99. Structures of the new compounds were elucidated by extensive spectroscopic analyses, single-crystal X-ray diffractions, and ECD calculations. Dipimprinines A–D (1–4) showed weak cytotoxic activities against five tumor cell lines, including HL-60, SMMC-7721, A-549, MCF-7, and SW-480, with IC50 values ranging from 12.7 to 30.7 μM.
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Affiliation(s)
- Zhiyin Yu
- Heilongjiang Provincial Key Laboratory of Agricultural Microbiology, Northeast Agricultural University, Harbin, China.,State Key Laboratory of Phytochemistry and Plant Resources in West China, CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Hao Jiang
- Heilongjiang Provincial Key Laboratory of Agricultural Microbiology, Northeast Agricultural University, Harbin, China
| | - Li Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Feng-Xian Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Jian-Ping Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Chongxi Liu
- Heilongjiang Provincial Key Laboratory of Agricultural Microbiology, Northeast Agricultural University, Harbin, China.,State Key Laboratory of Phytochemistry and Plant Resources in West China, CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Xiaowei Guo
- Heilongjiang Provincial Key Laboratory of Agricultural Microbiology, Northeast Agricultural University, Harbin, China.,State Key Laboratory of Phytochemistry and Plant Resources in West China, CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Wensheng Xiang
- Heilongjiang Provincial Key Laboratory of Agricultural Microbiology, Northeast Agricultural University, Harbin, China
| | - Sheng-Xiong Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
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Song ZL, Zhu Y, Liu JR, Guo SK, Gu YC, Han X, Dong HQ, Sun Q, Zhang WH, Zhang MZ. Diversity-oriented synthesis and antifungal activities of novel pimprinine derivative bearing a 1,3,4-oxadiazole-5-thioether moiety. Mol Divers 2020; 25:205-221. [PMID: 32056130 DOI: 10.1007/s11030-020-10048-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 02/05/2020] [Indexed: 10/25/2022]
Abstract
Based on the strategy of diversity-oriented synthesis and the structures of natural product pimprinine and streptochlorin, two series of novel pimprinine derivatives containing 1,3,4-oxadiazole-5-thioether moieties were efficiently synthesized under the optimized reaction conditions. Biological assays conducted at Syngenta showed the designed derivatives displayed an altered pattern of biological activity, of which 5h was identified as the most promising compound with strong activity against Pythium dissimile and also a broad antifungal spectrum in primary screening. Further structural optimization of pimprinine and streptochlorin derivatives is well under way, aiming to discover synthetic analogues with improved antifungal activity. Two series of novel pimprinine derivatives containing 1,3,4-oxadiazole-5-thioether moieties were efficiently synthesized through diversity-oriented synthesis strategy under the optimized conditions. Biological assays showed the designed derivatives exhibited potential activity.
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Affiliation(s)
- Zi-Long Song
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yun Zhu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jing-Rui Liu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shu-Ke Guo
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yu-Cheng Gu
- Syngenta Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK
| | - Xinya Han
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, 243002, China.
| | - Hong-Qiang Dong
- College of Plant Science, Tarim University, Alaer, 843300, Xinjiang, China
| | - Qi Sun
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Ming-Zhi Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
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30
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Kundu S, Banerjee A, Maji MS. Brønsted Acid-Catalyzed Tandem Pinacol-Type Rearrangement for the Synthesis of α-(3-Indolyl) Ketones by Using α-Hydroxy Aldehydes. J Org Chem 2019; 84:16003-16012. [PMID: 31747752 DOI: 10.1021/acs.joc.9b02474] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Samrat Kundu
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Ankush Banerjee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Modhu Sudan Maji
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
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31
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Kumari A, Singh RK. Medicinal chemistry of indole derivatives: Current to future therapeutic prospectives. Bioorg Chem 2019; 89:103021. [PMID: 31176854 DOI: 10.1016/j.bioorg.2019.103021] [Citation(s) in RCA: 238] [Impact Index Per Article: 47.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/22/2019] [Accepted: 05/29/2019] [Indexed: 12/21/2022]
Abstract
Indole is a versatile pharmacophore, a privileged scaffold and an outstanding heterocyclic compound with wide ranges of pharmacological activities due to different mechanisms of action. It is an superlative moiety in drug discovery with the sole property of resembling different structures of the protein. Plenty of research has been taking place in recent years to synthesize and explore the various therapeutic prospectives of this moiety. This review summarizes some of the recent effective chemical synthesis (2014-2018) for indole ring. This review also emphasized on the structure-activity relationship (SAR) to reveal the active pharmacophores of various indole analogues accountable for anticancer, anticonvulsant, antimicrobial, antitubercular, antimalarial, antiviral, antidiabetic and other miscellaneous activities which have been investigated in the last five years. The precise features with motives and framework of each research topic is introduced for helping the medicinal chemists to understand the perspective of the context in a better way. This review will definitely offer the platform for researchers to strategically design diverse novel indole derivatives having different promising pharmacological activities with reduced toxicity and side effects.
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Affiliation(s)
- Archana Kumari
- Rayat-Bahra Institute of Pharmacy, Dist. Hoshiarpur, 146104 Punjab, India
| | - Rajesh K Singh
- Department of Pharmaceutical Chemistry, Shivalik College of Pharmacy, Nangal, Dist. Rupnagar, 140126 Punjab, India.
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32
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Expanding the chemical space of sp3-enriched 4,5-disubstituted oxazoles via synthesis of novel building blocks. Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02475-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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33
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Ke S, Zhang Z, Shi L, Liu M, Fang W, Zhang Y, Wu Z, Wan Z, Long T, Wang K. An efficient synthesis and bioactivity evaluation of oxazole-containing natural hinduchelins A-D and their derivatives. Org Biomol Chem 2019; 17:3635-3639. [PMID: 30916700 DOI: 10.1039/c9ob00352e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Oxazoles are an important class of biologically active metabolites from nature, and exhibit broad biological activities as the lead for drug discovery. Hinduchelins are a class of unusual natural products with an oxazole unit, isolated from Streptoalloteichus hindustanus, and with a potential iron-chelating ability. These compounds are the first identified naturally occurring unusual oxazole derivatives to possess a catechol unit. However, some of these compounds are not abundant in nature, and thus, the efficient syntheses of these compounds are advantageous in exploring their potential applications. This paper reports the efficient synthesis and bio-evaluation of hinduchelins A-D and their derivatives with convenient procedures and high yields.
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Affiliation(s)
- Shaoyong Ke
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China.
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Cao L, Yan W, Gu C, Wang Z, Zhao S, Kang S, Khan B, Zhu H, Li J, Ye Y. New Alkylitaconic Acid Derivatives from Nodulisporium sp. A21 and Their Auxin Herbicidal Activities on Weed Seeds. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:2811-2817. [PMID: 30789727 DOI: 10.1021/acs.jafc.8b04996] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Five alkylitaconic acid (AA) derivatives, including two novel compounds, epideoxysporothric acid (2) and sporochartine F (5), and three known compounds, deoxysporothric acid (1), deoxyisosporothric acid (3), and 1-undecen-2,3-dicarboxylic acid (4), were obtained from the fermentation culture of the endophytic fungus Nodulisporium sp. A21. The auxin herbicidal activities of compounds 1-4 against weed seeds were investigated under laboratory conditions. In general, the tested compounds displayed radicle growth promoting activity at low doses and inhibitory activity at higher doses. Compounds 1 and 2 could significantly inhibit the radicle growth of dicotyledon weeds, Eclipta prostrata and Veronica persica, at a concentration range from 50 to 200 μg mL-1, while 3 notably stimulated radicle growth at the same concentration range. The results suggested that these AA derivatives have the potential to be used as the lead scaffold for novel auxin herbicide development. In addition, the biosynthetic pathways of 1-4 were deduced based on 13C labeling experiment.
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Affiliation(s)
- Lingling Cao
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application , Nanjing Agricultural University , Nanjing 210095 , P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests , Ministry of Education , Nanjing 210095 , P. R. China
| | - Wei Yan
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application , Nanjing Agricultural University , Nanjing 210095 , P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests , Ministry of Education , Nanjing 210095 , P. R. China
| | - Chenguang Gu
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application , Nanjing Agricultural University , Nanjing 210095 , P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests , Ministry of Education , Nanjing 210095 , P. R. China
| | - Zhiyang Wang
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application , Nanjing Agricultural University , Nanjing 210095 , P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests , Ministry of Education , Nanjing 210095 , P. R. China
| | - Shuangshuang Zhao
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application , Nanjing Agricultural University , Nanjing 210095 , P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests , Ministry of Education , Nanjing 210095 , P. R. China
| | - Shuang Kang
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application , Nanjing Agricultural University , Nanjing 210095 , P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests , Ministry of Education , Nanjing 210095 , P. R. China
| | - Babar Khan
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application , Nanjing Agricultural University , Nanjing 210095 , P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests , Ministry of Education , Nanjing 210095 , P. R. China
| | - Hailiang Zhu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences , Nanjing University , Nanjing 210023 , P. R. China
| | - Jun Li
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application , Nanjing Agricultural University , Nanjing 210095 , P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests , Ministry of Education , Nanjing 210095 , P. R. China
| | - Yonghao Ye
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application , Nanjing Agricultural University , Nanjing 210095 , P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests , Ministry of Education , Nanjing 210095 , P. R. China
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35
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Solomin VV, Radchenko DS, Slobodyanyuk EY, Geraschenko OV, Vashchenko BV, Grygorenko OO. Widely Exploited, Yet Unreported: Regiocontrolled Synthesis and the Suzuki-Miyaura Reactions of Bromooxazole Building Blocks. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Vitalii V. Solomin
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
| | - Dmytro S. Radchenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Taras Shevchenko National University of Kyiv; Ukraine
| | - Evgeniy Y. Slobodyanyuk
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Institute of Organic Chemistry; National Academy of Sciences of Ukraine, Murmanska Street 5, Kyiv 02660; Ukraine
| | - Oleksandr V. Geraschenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
| | - Bohdan V. Vashchenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Taras Shevchenko National University of Kyiv; Ukraine
| | - Oleksandr O. Grygorenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Taras Shevchenko National University of Kyiv; Ukraine
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36
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Liu B, Li R, Li Y, Li S, Yu J, Zhao B, Liao A, Wang Y, Wang Z, Lu A, Liu Y, Wang Q. Discovery of Pimprinine Alkaloids as Novel Agents against a Plant Virus. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:1795-1806. [PMID: 30681853 DOI: 10.1021/acs.jafc.8b06175] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Plant viral diseases cause tremendous decreases in crop yield and quality. Natural products have always been a valuable source for lead discovery in medicinal and agricultural chemistry. A series of pimprinine alkaloids and their derivatives were prepared and identified by nuclear magnetic resonance (NMR) spectroscopy and high-resolution mass spectrometry (HR-MS). The antiviral activities of these alkaloids against tobacco mosaic virus (TMV) were systematically investigated for the first time. Most of the compounds exhibited higher antiviral activities than ribavirin. Compounds 5l, 9h, and 10h, which had similar or higher antiviral activities than ningnanmycin (perhaps the most widely used antiviral agent at present), emerged as new antiviral pilot compounds. This systematic structure-activity-relationship research lays the foundation for simplifying the structure of these alkaloids. The ring-open products, acylhydrazones 9a-9u, were also found to possess good antiviral activities. Moreover, all the synthesized compounds displayed broad-spectrum fungicidal activities. This study provides important information for the research and development of pimprinine alkaloids as novel antiviral agents.
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Affiliation(s)
- Bin Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Rui Li
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Yanan Li
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Songyi Li
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Jin Yu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Binfen Zhao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Ancai Liao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Ying Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Ziwen Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Aidang Lu
- School of Chemical Engineering and Technology , Hebei University of Technology, Hebei Collaborative Innovation Center of Modern Marine Chemical Technology , Tianjin 300130 , China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China
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37
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Yang R, Lv M, Xu H. Synthesis of Piperine Analogs Containing Isoxazoline/Pyrazoline Scaffold and Their Pesticidal Bioactivities. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:11254-11264. [PMID: 30295024 DOI: 10.1021/acs.jafc.8b03690] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In continuation of our program to discover new potential pesticidal agents, thirty-one piperine analogs containing isoxazoline/pyrazoline scaffold were prepared, and confirmed by infrared spectra, proton/carbon-13 nuclear magnetic resonance spectra, and high-resolution mass spectra. The structures of compounds VIIb and VIIIc were further determined by 1H-1H COSY spectra. Especially the configuration of compound VIIIc was unambiguously confirmed by single-crystal X-ray diffraction. Their pesticidal activities were evaluated against three serious and typically crop-threatening agricultural pests, Tetranychus cinnabarinus Boisduval (spider mite), Mythimna separata Walker (Oriental armyworm), and Plutella xylostella Linnaeus (diamondback moth). Compounds VIIIb and VIIIc exhibited greater than 40-fold more potent acaricidal activity than the lead compound piperine against T. cinnabarinus. Notably, compounds VIa-c exhibited more pronounced oral toxicity against P. xylostella than toosendanin; compounds VIb and VIc displayed more promising growth inhibitory activity against M. separata than toosendanin. It demonstrated that the methylenedioxy and isoxazoline scaffolds were important for the oral toxicity and growth inhibitory activity against P. xylostella and M. separata, respectively; the ethylenedioxy and isoxazoline scaffolds were vital for the acaricidal activity against T. cinnabarinus. Moreover, compounds VIb, VIIf, and VIIIc showed very low toxicity against NRK-52E cells.
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Affiliation(s)
- Ruige Yang
- Research Institute of Pesticidal Design & Synthesis, College of Chemistry and Pharmacy/Plant Protection , Northwest A&F University , Yangling 712100 , Shaanxi Province , China
| | - Min Lv
- Research Institute of Pesticidal Design & Synthesis, College of Chemistry and Pharmacy/Plant Protection , Northwest A&F University , Yangling 712100 , Shaanxi Province , China
| | - Hui Xu
- Research Institute of Pesticidal Design & Synthesis, College of Chemistry and Pharmacy/Plant Protection , Northwest A&F University , Yangling 712100 , Shaanxi Province , China
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38
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Affiliation(s)
- Clemens Lamberth
- Syngenta Crop Protection AG; Chemical Research; Schaffhauserstrasse 101 Stein CH-4332 Switzerland
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Zhou Y, Choi YJ, Kim E, Oh MH, Shin HJ, Kim SK, Lee K. Pharmacokinetics and Metabolism of Streptochlorin and Its Synthetic Derivative, 5-Hydroxy-2'-isobutyl Streptochlorin, in Mice. Biol Pharm Bull 2018; 41:326-337. [PMID: 29491209 DOI: 10.1248/bpb.b17-00654] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The purpose of this study was to investigate the pharmacokinetics and metabolism of streptochlorin and its derivative 5-hydroxy-2'-isobutyl streptochlorin (HIS) in mice. Plasma concentration of streptochlorin declined rapidly resulting in a high sustemic plasma clearance (CLp) (5.8±1.7 L/h/kg), a large volume of distribution (Vss) (1.4±0.9 L/kg) and a short half-life (t1/2) (0.4±0.1 h) after a single intravenous administration (5 mg/kg). Oral bioavailability (F) was 10.3±3.4% after a single oral administration (10 mg/kg). HIS also showed a rapid plasma decline with a high CLp (11.3±8.8 L/h/kg), a high Vss (0.8±1.0 L/kg) and a short t1/2 (0.070±0.004 h) following intravenous administration. It was not detected in plasma after oral administration. Metabolic stability studies using mouse liver microsomes and S9 fractions predicted a high hepatic clearance for both compounds, consistent with the in vivo data. Metabolite identification studies revealed three metabolic pathways for streptochlorin: monooxygenation, glucuronidation of the indole moiety and oxidative opening of the 4-chlorooxazole ring. HIS was metabolized via monooxygenation of the isobutyl chain and glucuronidation of the indole ring. These results may aid in structural optimization to mitigate the metabolic liability of streptochlorin.
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Affiliation(s)
| | | | | | | | - Hee Jae Shin
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology (KIOST)
| | | | - Kiho Lee
- College of Pharmacy, Korea University.,Biomedical Research Center, Korea University Guro Hospital
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40
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Jia CY, Xu LY, Yu X, Ding YB, Jin B, Zhang MZ, Zhang WH, Yang GF. An efficient synthesis and antifungal evaluation of natural product streptochlorin and its analogues. Fitoterapia 2017; 125:106-110. [PMID: 29269233 DOI: 10.1016/j.fitote.2017.12.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 12/15/2017] [Accepted: 12/17/2017] [Indexed: 11/26/2022]
Abstract
Streptochlorin, a small indole alkaloid isolated from marine Streptomyces sp., exhibits a wide range of potent biological activities. An efficient and economic synthetic protocol for streptochlorin has been developed and validated, 4 steps from indole in a total yield of 45%, and further applied for the synthesis of its analogues. Biological testing showed that most of the target compounds exhibited potential antifungal activity in the primary assays, especially compounds 6, 7 and 9c were the most active ones, representing effective activity against the phytopathogenic fungi screened in preliminary test and might be explored for the study of mode of action in the future.
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Affiliation(s)
- Chen-Yang Jia
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China; Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Li-Yong Xu
- Nanjing Agricultural University Hospital, Nanjing 210095, PR China
| | - Xiang Yu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yu-Bing Ding
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Bing Jin
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Ming-Zhi Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Guang-Fu Yang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
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41
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Li D, Zhang S, Song Z, Wang G, Li S. Bioactivity-guided mixed synthesis accelerate the serendipity in lead optimization: Discovery of fungicidal homodrimanyl amides. Eur J Med Chem 2017; 136:114-121. [PMID: 28486209 DOI: 10.1016/j.ejmech.2017.04.073] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/26/2017] [Accepted: 04/29/2017] [Indexed: 12/31/2022]
Abstract
The bioactivity-guided mixed synthesis was conceived, in which the designed mix-reactions were run in parallel for simultaneous construction of different kinds of analogs. The valuable ones were protruded by biological screening. This tactic will facilitate more rapid incorporation of bioactive candidates into pesticide chemists' repertoire, exemplified by the optimization of less explored homodrimanes as antifungal ingredients. The discovery of D9 as a potent fungicidal agent can be completed in <2 weeks by one student, with EC50 of 3.33 mg/L and 2.45 mg/L against S. sclerotiorum and B. cinerea, respectively. To confirm the practicability, time-efficiency, and reliability, specific homodrimanes (82 derivatives) were synthesized and elucidated separately and determined for EC50 values. The SAR correlated well with the intentionally mixed synthesis and the potential was further confirmed by the in vivo bioassay. This methodology will foster more efficient exploration of biologically relevant chemical space of natural products in pesticide discovery, and can also be tailored readily for the lead optimization in medicinal chemistry.
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Affiliation(s)
- Dangdang Li
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Weigang 1, Xuanwu District, Nanjing 210095, People's Republic of China
| | - Shasha Zhang
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Weigang 1, Xuanwu District, Nanjing 210095, People's Republic of China
| | - Zehua Song
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Weigang 1, Xuanwu District, Nanjing 210095, People's Republic of China
| | - Guotong Wang
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Weigang 1, Xuanwu District, Nanjing 210095, People's Republic of China
| | - Shengkun Li
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Weigang 1, Xuanwu District, Nanjing 210095, People's Republic of China; Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, People's Republic of China; Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People's Republic of China.
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Zhang MZ, Jia CY, Gu YC, Mulholland N, Turner S, Beattie D, Zhang WH, Yang GF, Clough J. Synthesis and antifungal activity of novel indole-replaced streptochlorin analogues. Eur J Med Chem 2016; 126:669-674. [PMID: 27936445 DOI: 10.1016/j.ejmech.2016.12.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 11/29/2016] [Accepted: 12/01/2016] [Indexed: 12/13/2022]
Abstract
Based on examples of the successful applications in drug discovery of bioisosterism, a series of streptochlorin analogues in which indole has been replaced by other heterocycles has been designed and synthesized, as a continuation of our studies aimed at the discovery of novel streptochlorin analogues with improved antifungal activity. Biological testing showed that most of the indole-replaced streptochlorin analogues were inactive, though compound 6f had a broad spectrum of antifungal activity with significant activity against Alternaria solani. The SAR study demonstrated that indole ring is an essential moiety for the antifungal activity of streptochlorin analogues, promoting the idea of indole ring as a framework that might be exploited in the future.
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Affiliation(s)
- Ming-Zhi Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China; Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
| | - Chen-Yang Jia
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China; Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Yu-Cheng Gu
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Nick Mulholland
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Sarah Turner
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - David Beattie
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Guang-Fu Yang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - John Clough
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
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Zhang MZ, Zhang Y, Wang JQ, Zhang WH. Design, Synthesis and Antifungal Activity of Coumarin Ring-Opening Derivatives. Molecules 2016; 21:molecules21101387. [PMID: 27763520 PMCID: PMC6273309 DOI: 10.3390/molecules21101387] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 09/30/2016] [Accepted: 10/13/2016] [Indexed: 01/25/2023] Open
Abstract
Based on our initial design, we synthesized two series of coumarin ring-opening derivatives by the reactions of hydrolysis and methylation. Results of antifungal screening in vitro showed that the target compounds exhibited potent activity against the six common pathogenic fungi. Compounds 6b, 6e, 6g, 6i, 7b and 7c were identified as the most active ones, and the EC50 values of these active compounds were further tested. Compared to the commonly used fungicide Azoxystrobin (0.0884 µM), compounds 6b (0.0544 µM) and 6e (0.0823 µM) displayed improved activity against Botrytis cinerea.
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Affiliation(s)
- Ming-Zhi Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Yu Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Jia-Qun Wang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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Guo DL, Wan B, Xiao SJ, Allen S, Gu YC, Ding LS, Zhou Y. Cyclic Lipopeptides with Herbicidal and Insecticidal Activities Produced by Bacillus clausii DTM1. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Seven cyclic lipopeptide biosurfactants (1–7) were isolated for the first time from the fermentation broth of endophytic Bacillus clausii DTM1 and were identified as anteisoC13[Val7] surfactin-(L-Glu)-O-methyl-ester (1), anteisoC12[Val7] surfactin (2), anteisoC15[Val7] surfactin (3), isoC14[Leu7] surfactin (4), anteisoC12[Leu7] surfactin (5), nC13[Leu7] surfactin (6), and anteisoC14[Leu7] surfactin-(L-Glu)-O-methyl-ester (7); 1 has not been isolated before as a natural product from any source. Plate-based herbicide and insecticide bioassays showed that all compounds exhibited interesting insecticidal and herbicidal activities.
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Affiliation(s)
- Da-Le Guo
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Bo Wan
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Shi-Ji Xiao
- School of Pharmacy, Zunyi Medical College, Zunyi 563000, P. R. China
| | - Sarah Allen
- Syngenta, Jealott's Hill International Research Centre, Berkshire RG42 6EY, UK
| | - Yu-Cheng Gu
- Syngenta, Jealott's Hill International Research Centre, Berkshire RG42 6EY, UK
| | - Li-Sheng Ding
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Yan Zhou
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
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Zhang MZ, Chen Q, Xie CH, Mulholland N, Turner S, Irwin D, Gu YC, Yang GF, Clough J. Synthesis and antifungal activity of novel streptochlorin analogues. Eur J Med Chem 2015; 92:776-83. [PMID: 25633493 DOI: 10.1016/j.ejmech.2015.01.043] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Revised: 01/20/2015] [Accepted: 01/21/2015] [Indexed: 10/24/2022]
Abstract
Streptochlorin, first isolated as a new antibiotic in 1988 from the lipophilic extracts of the mycelium of a Streptomyces sp, is an indole natural products with a variety of biological activities. Based on the methods developed for the synthesis of pimprinine in our laboratory, we have synthesized a series of indole-modified streptochlorin analogues and measured their activities against seven phytopathogenic fungi. Some of the analogues displayed good activity in the primary assays, and the seven compounds 10b, 10c, 11e, 13e, 21, 22c and 22e (shown in Figure 1) were identified as the most promising candidates for further study. Structural optimization is still ongoing with the aim of discovering synthetic analogues with improved antifungal activity.
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Affiliation(s)
- Ming-Zhi Zhang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Qiong Chen
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
| | - Cai-Hong Xie
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Nick Mulholland
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Sarah Turner
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Dianne Irwin
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Yu-Cheng Gu
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Guang-Fu Yang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
| | - John Clough
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
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Pandey SK, Guttormsen Y, Haug BE, Hedberg C, Bayer A. A Concise Total Synthesis of Breitfussin A and B. Org Lett 2014; 17:122-5. [DOI: 10.1021/ol503348n] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sunil Kumar Pandey
- University of Bergen, Department of Chemistry and Centre
for Pharmacy, Allégt
41, NO-5007 Bergen, Norway
| | - Yngve Guttormsen
- UiT The Arctic University of Norway, Department of Chemistry, Breivika, NO-9037 Tromsø, Norway
| | - Bengt Erik Haug
- University of Bergen, Department of Chemistry and Centre
for Pharmacy, Allégt
41, NO-5007 Bergen, Norway
| | - Christian Hedberg
- Max-Planck Institute for Molecular Physiology, Department for
Chemical Biology, DE-44227 Dortmund, Germany
- Umeå University, Department of Chemistry, S-90187, Umeå, Sweden
| | - Annette Bayer
- UiT The Arctic University of Norway, Department of Chemistry, Breivika, NO-9037 Tromsø, Norway
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Wei Y, Fang W, Wan Z, Wang K, Yang Q, Cai X, Shi L, Yang Z. Antiviral effects against EV71 of pimprinine and its derivatives isolated from Streptomyces sp. Virol J 2014; 11:195. [PMID: 25410379 PMCID: PMC4253628 DOI: 10.1186/s12985-014-0195-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 10/29/2014] [Indexed: 12/26/2022] Open
Abstract
Background The pimprinine family of compounds represent very important and promising microbial metabolites for drug discovery. However, their ability in inhibiting viral infections has not yet been tested. Methods The antiviral activity of the pimprinine family of compounds was evaluated by determining the cytopathic effect (CPE), cell viability or plaque-forming unit (PFU), and virus yield. The mechanism of action against EV71 was determined from the virucidal activity, and effective stage and time-of-addition assays. The effects on EV71 replication were evaluated further by determining viral RNA synthesis, protein expression and cells apoptosis using the SYBR Green assays, immunofluorescence assays and flow cytometric assays, respectively. Results Pimprinethine, WS-30581 A and WS-30581 B inhibited EV71-induced CPE, reduced progeny EV71 yields, as well as prevented EV71-induced apoptosis in human rhabdomyosarcoma (RD) cells. These compounds were found to target the early stages of the EV71 replication in cells including viral RNA replication and protein synthesis. They also showed antiviral activity against ADV-7, and were slightly active against CVB3, HSV-1 and H1N1 with a few exceptions. Pimprinine was slightly active or inactive against all the viruses tested. The mechanisms by which these compounds act against the viruses tested may be similar to that demonstrated for EV71. Conclusion The data described herein demonstrate that the pimprinine family of compounds are inhibitors effective against the replication of EV71 and ADV-7, so they might be feasible therapeutic agents for the treatment of viral infections.
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Affiliation(s)
- Yanhong Wei
- College of Life Sciences, Wuhan University, Wuhan, 430072, P. R. of China.
| | - Wei Fang
- National Biopesticide Engineering Research Center, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. of China.
| | - Zhongyi Wan
- National Biopesticide Engineering Research Center, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. of China.
| | - Kaimei Wang
- National Biopesticide Engineering Research Center, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. of China.
| | - Qingyu Yang
- College of Life Sciences, Wuhan University, Wuhan, 430072, P. R. of China.
| | - Xiaofeng Cai
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Bonn, 53121, German.
| | - Liqiao Shi
- National Biopesticide Engineering Research Center, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. of China.
| | - Ziwen Yang
- College of Life Sciences, Wuhan University, Wuhan, 430072, P. R. of China. .,National Biopesticide Engineering Research Center, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. of China.
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Guo Y, Qu H, Zhi X, Yu X, Yang C, Xu H. Semisynthesis and insecticidal activity of some fraxinellone derivatives modified in the B ring. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:11937-11944. [PMID: 24261313 DOI: 10.1021/jf404195m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A series of novel fraxinellone derivatives modified at the C-1 or C-8 position in the B ring were prepared as insecticidal agents against the pre-third-instar larvae of oriental armyworm, Mythimna separata Walker at 1 mg/mL. Five key steric configurations of compounds 2, 3, and 8f,g,j were further determined by single-crystal X-ray diffraction. It was found that the kinds and the amount of the reduction products of fraxinellone were related to the molar ratio between the reduction agent Red-Al and the substrate fraxinellone. Among all of the derivatives, compounds 2 and 8i,j,o displayed more promising insecticidal activity than their precursors fraxinellone and toosendanin. The preliminary structure-activity relationships revealed that the lactone (B-ring) of fraxinellone contributed to the observed insecticidal activity; the double bond at the C-2 position of fraxinellone was not necessary for the insecticidal activity; conversion of the oxygen atom of carbonyl group on the lactone of fraxinellone to a sulfur one does not improve the insecticidal activity; introduction of electron-withdrawing groups on the phenyl ring of 8f, to the benzoyloxy series, could result in more potent compounds.
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Affiliation(s)
- Yong Guo
- Laboratory of Pharmaceutical Design and Synthesis, College of Sciences, Northwest A&F University , Yangling 712100, Shaanxi Province, People's Republic of China
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Lee JS, Shin J, Lee HS, Shin HJ, Lee YJ. A Concise and Rapid Approach to the Marine Natural Product Streptochlorin and its Analogues. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.2.357] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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50
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Synthesis and antifungal activity of 3-(1,3,4-oxadiazol-5-yl)-indoles and 3-(1,3,4-oxadiazol-5-yl)methyl-indoles. Eur J Med Chem 2013; 63:22-32. [PMID: 23454531 DOI: 10.1016/j.ejmech.2013.01.038] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 01/25/2013] [Accepted: 01/30/2013] [Indexed: 11/24/2022]
Abstract
On the basis of the principle of combination of active structural moieties, a modified and efficient synthetic method for three series of novel indole-based 1,3,4-oxadiazoles is described. Bioassays conducted at Syngenta showed that several of the synthesized compounds exhibit higher antifungal activity than pimprinine, the natural product which inspired this synthesis. Two main structural alterations were found to broaden the spectrum of biological activity in most cases. Compounds 3g, 6c, 6e, 6h, 9d, 9e, 9h and 9m (Fig. 1) were identified as the most active on the biological assays, and will be studied further.
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