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Synthesis and Biological Activity of Novel (Z)- and (E)-Verbenone Oxime Esters. Molecules 2017; 22:molecules22101678. [PMID: 29023419 PMCID: PMC6151715 DOI: 10.3390/molecules22101678] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 10/07/2017] [Indexed: 01/29/2023] Open
Abstract
Twenty-seven (Z)- and (E)-verbenone derivatives bearing an oxime ester moiety were designed and synthesized in search of novel bioactive molecules. Their structures were confirmed by UV-Vis, FTIR, NMR, ESI-MS, and elemental analysis. The antifungal and herbicidal activities of the target compounds were preliminarily evaluated. As a result, compound (E)-4n (R = β-pyridyl) exhibited excellent antifungal activity with growth inhibition percentages of 92.2%, 80.0% and 76.3% against Alternaria solani, Physalospora piricola, and Cercospora arachidicola at 50 µg/mL, showing comparable or better antifungal activity than the commercial fungicide chlorothalonil with growth inhibition of 96.1%, 75.0% and 73.3%, respectively, and 1.7-5.5-fold more growth inhibition than its stereoisomer (Z)-4n (R = β-pyridyl) with inhibition rates of 22.6%, 28.6% and 43.7%, respectively. In addition, seven compounds displayed significant growth inhibition activity of over 90% against the root of rape (Brassica campestris) at 100 µg/mL, exhibiting much better herbicidal activity than the commercial herbicide flumioxazin with a 63.0% growth inhibition. Among these seven compounds, compound (E)-4n (R = β-pyridyl) inhibited growth by 92.1%, which was 1.7-fold more than its stereoisomer (Z)-4n (R = β-pyridyl) which inhibited growth by 54.0%.
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Huang M, Duan WG, Lin GS, Li K, Hu Q. Synthesis and Antifungal Activity of Novel 3-Caren-5-One Oxime Esters. Molecules 2017; 22:molecules22091538. [PMID: 28895932 PMCID: PMC6151701 DOI: 10.3390/molecules22091538] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 09/08/2017] [Accepted: 09/08/2017] [Indexed: 12/14/2022] Open
Abstract
A series of novel 3-caren-5-one oxime esters were designed and synthesized by multi-step reactions in an attempt to develop potent antifungal agents. Two E-Z stereoisomers of the intermediate 3-caren-5-one oxime were separated by column chromatography for the first time. The structures of all the intermediates and target compounds were confirmed by UV-Vis, FTIR, NMR, ESI-MS, and elemental analysis. The antifungal activity of the target compounds was preliminarily evaluated by the in vitro method against Fusarium oxysporum f. sp. cucumerinum, Physalospora piricola, Alternaria solani, Cercospora arachidicola, Gibberella zeae,Rhizoeotnia solani, Bipolaris maydis, and Colleterichum orbicalare at 50 µg/mL. The target compounds exhibited best antifungal activity against P. piricola, in which compounds (Z)-4r (R = β-pyridyl), (Z)-4q (R = α-thienyl), (E)-4f′ (R = p-F Ph), (Z)-4i (R = m-Me Ph), (Z)-4j (R = p-Me Ph), and (Z)-4p (R = α-furyl) had inhibition rates of 97.1%, 87.4%, 87.4%, 85.0%, 81.9%, and 77.7%, respectively, showing better antifungal activity than that of the commercial fungicide chlorothanil. Also, compound (Z)-4r (R = β-pyridyl) displayed remarkable antifungal activity against all the tested fungi, with inhibition rates of 76.7%, 82.7%, 97.1%, 66.3%, 74.7%, 93.9%, 76.7% and 93.3%, respectively, showing better or comparable antifungal activity than that of the commercial fungicide chlorothanil. Besides, the E-Z isomers of the target oxime esters were found to show obvious differences in antifungal activity. These results provide an encouraging framework that could lead to the development of potent novel antifungal agents.
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Affiliation(s)
- Min Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China.
| | - Wen-Gui Duan
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China.
| | - Gui-Shan Lin
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China.
| | - Kun Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China.
| | - Qiong Hu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China.
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Zong G, Yan X, Bi J, Jiang R, Qin Y, Yuan H, Lu H, Dong Y, Jin S, Zhang J. Synthesis, fungicidal evaluation and 3D-QSAR studies of novel 1,3,4-thiadiazole xylofuranose derivatives. PLoS One 2017; 12:e0181646. [PMID: 28746366 PMCID: PMC5528880 DOI: 10.1371/journal.pone.0181646] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 07/05/2017] [Indexed: 11/20/2022] Open
Abstract
1,3,4-Thiadiazole and sugar-derived molecules have proven to be promising agrochemicals with growth promoting, insecticidal and fungicidal activities. In the research field of agricultural fungicide, applying union of active group we synthesized a new set of 1,3,4-thiadiazole xylofuranose derivatives and all of the compounds were characterized by 1H NMR and HRMS. In precise toxicity measurement, some of compounds exhibited more potent fungicidal activities than the most widely used commercial fungicide Chlorothalonil, promoting further research and development. Based on our experimental data, 3D-QSAR (three-dimensional quantitative structure-activity relationship) was established and investigated using comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) techniques, helping to better understand the structural requirements of lead compounds with high fungicidal activity and environmental compatibility.
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Affiliation(s)
- Guanghui Zong
- Key Laboratory of Pesticide Chemistry and Application Technology, College of Science, China Agricultural University, Beijing, China
| | - Xiaojing Yan
- The Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jiawei Bi
- Key Laboratory of Pesticide Chemistry and Application Technology, College of Science, China Agricultural University, Beijing, China
| | - Rui Jiang
- Key Laboratory of Pesticide Chemistry and Application Technology, College of Science, China Agricultural University, Beijing, China
| | - Yinan Qin
- Key Laboratory of Pesticide Chemistry and Application Technology, College of Science, China Agricultural University, Beijing, China
| | - Huizhu Yuan
- The Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Huizhe Lu
- Key Laboratory of Pesticide Chemistry and Application Technology, College of Science, China Agricultural University, Beijing, China
- * E-mail: (HL); (JZ)
| | - Yanhong Dong
- Key Laboratory of Pesticide Chemistry and Application Technology, College of Science, China Agricultural University, Beijing, China
| | - Shuhui Jin
- Key Laboratory of Pesticide Chemistry and Application Technology, College of Science, China Agricultural University, Beijing, China
| | - Jianjun Zhang
- Key Laboratory of Pesticide Chemistry and Application Technology, College of Science, China Agricultural University, Beijing, China
- * E-mail: (HL); (JZ)
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Synthesis and In Vitro Anticancer Activity of Novel Dehydroabietic Acid-Based Acylhydrazones. Molecules 2017; 22:molecules22071087. [PMID: 28661452 PMCID: PMC6152134 DOI: 10.3390/molecules22071087] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Revised: 06/24/2017] [Accepted: 06/26/2017] [Indexed: 12/18/2022] Open
Abstract
In order to develop novel chemotherapeutic agents with potent anticancer activities, a series of dehydroabietic acid (DHA) derivatives bearing an acylhydrazone moiety were designed and synthesized by the condensation between dehydroabietic acylhydrazide (3) and a variety of substituted arylaldehydes. The inhibitory activities of these compounds against CNE-2 (nasopharynx), HepG2 (liver), HeLa (epithelial cervical), and BEL-7402 (liver) human carcinoma cell lines were evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay in vitro. The screening results revealed that many of the compounds showed moderate to high levels of anticancer activities against the tested cancer cell lines and some displayed similar potent inhibitory activities to the commercial anticancer drug cisplatin, while they exhibited lower cytotoxicity against normal human liver cell (HL-7702). Particularly, compound 4w, N'-(3,5-difluorobenzylidene)-2-(dehydroabietyloxy)acetohydrazide, with an IC50 (50% inhibitory concentration) value of 2.21 μM against HeLa cell, was about 17-fold more active than that of the parent compound, and showed remarkable cytotoxicity with an IC50 value of 14.46 μM against BEL-7402 cell. These results provide an encouraging framework that could lead to the development of potent novel anticancer agents.
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Synthesis and Antifungal Activity of Novel Myrtenal-Based 4-Methyl-1,2,4-triazole-thioethers. Molecules 2017; 22:molecules22020193. [PMID: 28125042 PMCID: PMC6155697 DOI: 10.3390/molecules22020193] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 01/21/2017] [Accepted: 01/21/2017] [Indexed: 01/02/2023] Open
Abstract
A series of novel myrtenal derivatives bearing 1,2,4-triazole moiety were designed and synthesized by multi-step reactions in an attempt to develop potent antifungal agents. Their structures were confirmed by using UV-vis, FTIR, NMR, and ESI-MS analysis. Antifungal activity of the target compounds was preliminarily evaluated by the in vitro method against Fusarium oxysporum f. sp. cucumerinum, Physalospora piricola, Alternaria solani, Cercospora arachidicola, and Gibberella zeae at 50 µg/mL. Compounds 6c (R = i-Pr), 6l (R = o-NO2 Bn), and 6a (R = Et) exhibited excellent antifungal activity against P. piricola with inhibition rates of 98.2%, 96.4%, and 90.7%, respectively, showing better or comparable antifungal activity than that of the commercial fungicide azoxystrobin with a 96.0% inhibition rate, which served as a positive control.
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Chen N, Duan W, Lin G, Liu L, Zhang R, Li D. Synthesis and antifungal activity of dehydroabietic acid-based 1,3,4-thiadiazole-thiazolidinone compounds. Mol Divers 2016; 20:897-905. [PMID: 27480629 DOI: 10.1007/s11030-016-9691-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 07/25/2016] [Indexed: 01/01/2023]
Abstract
In an attempt to search for new natural products-based antifungal agents, a series of novel dehydroabietic acid derivatives bearing a 1,3,4-thiadiazole-thiazolidinone moiety were designed and synthesized. The primary bioassay used showed that at a concentration of [Formula: see text], the target compounds 3c, 3f, and 3n exhibited excellent antifungal activity (91.3 % inhibition) against Gibberella zeae, which was equivalent to the commercial antifungal drug azoxystrobin (positive control).
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Affiliation(s)
- Naiyuan Chen
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, Guangxi, People's Republic of China
| | - Wengui Duan
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, Guangxi, People's Republic of China.
| | - Guishan Lin
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, Guangxi, People's Republic of China
| | - Luzhi Liu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, Guangxi, People's Republic of China
| | - Rui Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, Guangxi, People's Republic of China
| | - Dianpeng Li
- Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, 541006, Guangxi, People's Republic of China
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