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The Synthesis, Fungicidal Activity, and in Silico Study of Alkoxy Analogues of Natural Precocenes I, II, and III. Molecules 2022; 27:molecules27217177. [DOI: 10.3390/molecules27217177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 10/15/2022] [Accepted: 10/18/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to synthesize, characterize, and explore the eco-friendly and antifungal potential of precocenes and their derivatives. The organic synthesis of the mono-O-alkyl-2,2-dimethyl 2H-1-chromene series, including the natural product precocene I, and the di-O-alkyl 2,2-dimethyl-2H-1-chromene series, including the natural 2H-1-chromenes precocenes II and III, was achieved. The synthetic compounds were subjected to spectroscopic analysis, 1HNMR,13CNMR, and mass characterization. The antifungal activity of synthesized precocenes I, II, and III, as well as their synthetic intermediates, was evaluated by the poison food technique. Precocene II (EC50 106.8 µg × mL−1 and 4.94 µg mL−1), and its regioisomers 7a (EC50 97.18 µg × mL−1 and 35.30 µg × mL−1) and 7d (EC50 170.58 × µg mL−1), exhibited strong fungitoxic activity against Aspergillus niger and Rhizoctonia solani. Some of the novel chromenes, 11a and 11b, which had never been evaluated before, yielded stronger fungitoxic effects. Finally, docking simulations for compounds with promising fungitoxic activity were subjected to structure–activity relationship analyses against the polygalactouronases and voltage-dependent anion channels. Conclusively, precocenes and their regioisomers demonstrated promising fungitoxic activity; such compounds can be subjected to minor structural modifications to yield promising and novel fungicides.
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Synthesis and Activity of 2-Acyl-cyclohexane-1,3-dione Congeners Derived from Peperomia Natural Products against the Plant p-Hydroxyphenylpyruvate Dioxygenase Herbicidal Molecular Target Site. PLANTS 2022; 11:plants11172269. [PMID: 36079655 PMCID: PMC9459959 DOI: 10.3390/plants11172269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/19/2022] [Accepted: 08/24/2022] [Indexed: 11/19/2022]
Abstract
Plastoquinone is a key electron carrier in photosynthesis and an essential cofactor for the biosynthesis of carotenoids. p-Hydroxyphenylpyruvate dioxygenase (HPPD) is a vital enzymatic step in plastoquinone biosynthesis that is the target of triketone herbicides, such as those derived from the pharmacophore backbone of the natural product leptospermone. In this work, the inhibitory activity of a series of 2-acyl-cyclohexane-1,3-diones congeners derived from Peperomia natural products was tested on plant HPPD. The most active compound was a 2-acyl-cyclohexane-1,3-dione with a C11 alkyl side chain (5d; I50app: 0.18 ± 0.02 μM) that was slightly more potent than the commercial triketone herbicide sulcotrione (I50app: 0.25 ± 0.02 μM). QSAR analysis and docking studies were performed to further characterize the key structural features imparting activity. A 1,3-dione feature was required for inhibition of HPPD. Molecules with a side chain of 11 carbons were found to be optimal for inhibition, while the presence of a double bond, hydroxy, or methyl beyond the required structural features on the cyclohexane ring generally decreased HPPD inhibiting activity.
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3
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Bioactive Phenolic Compounds from Peperomia obtusifolia. Molecules 2022; 27:molecules27144363. [PMID: 35889234 PMCID: PMC9315869 DOI: 10.3390/molecules27144363] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/04/2022] [Accepted: 07/05/2022] [Indexed: 02/01/2023] Open
Abstract
Peperomia obtusifolia (L.) A. Dietr., native to Middle America, is an ornamental plant also traditionally used for its mild antimicrobial properties. Chemical investigation on the leaves of P. obtusifolia resulted in the isolation of two previously undescribed compounds, named peperomic ester (1) and peperoside (2), together with five known compounds, viz. N-[2-(3,4-dihydroxyphenyl)ethyl]-3,4-dihydroxybenzamide (3), becatamide (4), peperobtusin A (5), peperomin B (6), and arabinothalictoside (7). The structures of these compounds were elucidated by 1D and 2D NMR techniques and HREIMS analyses. Compounds 1–7 were evaluated for their anthelmintic (against Caenorhabditis elegans), antifungal (against Botrytis cinerea, Septoria tritici and Phytophthora infestans), antibacterial (against Bacillus subtilis and Aliivibrio fischeri), and antiproliferative (against PC-3 and HT-29 human cancer cell lines) activities. The known peperobtusin A (5) was the most active compound against the PC-3 cancer cell line with IC50 values of 25.6 µM and 36.0 µM in MTT and CV assays, respectively. This compound also induced 90% inhibition of bacterial growth of the Gram-positive B. subtilis at a concentration of 100 µM. In addition, compound 3 showed anti-oomycotic activity against P. infestans with an inhibition value of 56% by using a concentration of 125 µM. However, no anthelmintic activity was observed.
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Li Y, Luo B, Luo Z, Ma T, Fan L, Liu W, Fan J, Guo B, Xue W, Tang L. Design and synthesis of novel 2,2-dimethylchromene derivatives as potential antifungal agents. Mol Divers 2022; 27:589-601. [PMID: 35639225 DOI: 10.1007/s11030-022-10421-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 03/18/2022] [Indexed: 02/07/2023]
Abstract
In order to find novel environment-friendly and effective antifungal agents, four series of 2,2-dimethyl-2H-chromene derivatives were designed, synthesized and characterized by spectroscopic analysis. The antifungal activities of all the target compounds against nine phytopathogenic fungi were evaluated in vitro. Preliminary results indicated that most of the target compounds exhibited obvious antifungal activity at the concentration of 50 μg/mL. Among them, compound 4j displayed more promising antifungal potency against Fusarium solani, Pyricularia oryzae, Alternaria brassicae, Valsa mali and Alternaria alternata strains than the two commercially available fungicides chlorothalonil and hymexazol, with the corresponding EC50 values of 6.3, 7.7, 7.1, 7.5, 4.0 μg/mL, respectively. Moreover, the cell experiments results suggested that the target compounds had low cytotoxicity to the PC12 cell. This research will provide theoretical basis for the future application of 2,2-dimethyl-2H-chromenes as botanical fungicides in agriculture. Four series of novel, potent and low-toxicity 2,2-dimethyl-2H-chromene derivatives were designed and synthesized as agricultural antifungal agents. The in vitro antifungal experiments showed that compound 4j exhibited higher antifungal efficacy against five strains than the two commercially-available fungicides chlorothalonil and hymexazol.
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Affiliation(s)
- Yong Li
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Bilan Luo
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Zhongfu Luo
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Taigui Ma
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Lingling Fan
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Wenjing Liu
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Judi Fan
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Bing Guo
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, Guizhou Medical University, Guiyang, 550004, People's Republic of China
| | - Wei Xue
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, People's Republic of China
| | - Lei Tang
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research On Common Chronic Diseases, Guizhou Medical University, Guiyang, 550004, People's Republic of China.
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5
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Chemical Composition of Leaves, Stem, and Roots of Peperomia pellucida (L.) Kunth. Molecules 2022; 27:molecules27061847. [PMID: 35335210 PMCID: PMC8950162 DOI: 10.3390/molecules27061847] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/20/2022] [Accepted: 01/26/2022] [Indexed: 12/04/2022] Open
Abstract
Peperomia pellucida is a species known in the Amazon as “erva-de-jabuti” that has been used in several therapeutic applications based on folk medicine. Herein, we describe the classes, subclasses, and the main compounds of the leaves, stems, and roots from P. pellucida by ultra-high performance liquid chromatography coupled to high-resolution mass spectrometry associated with molecular networks, mirror plot on the GNPS library, and machine learning. These data show compounds that were annotated for the first time in the Peperomia genus, such as 2′,4′,5′-trihydroxybutyrophenonevelutin, dehydroretrofractamide C, and retrofractamide B.
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Gutiérrez-González JA, Pérez-Vásquez A, Torres-Colín R, Rangel-Grimaldo M, Rebollar-Ramos D, Mata R. α-Glucosidase Inhibitors from Ageratina grandifolia. JOURNAL OF NATURAL PRODUCTS 2021; 84:1573-1578. [PMID: 33857371 DOI: 10.1021/acs.jnatprod.1c00105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Fractionation of an aqueous extract from the aerial parts of Ageratina grandifolia yielded a new natural product, namely, 4-hydroxy-3-((S)-1'-angeloyloxy-(R)-2',3'-epoxy-3'-methyl)butylacetophenone (1), along with eight known compounds, including three flavonoids (2-4) and five chromenes (5-9). NMR data interpretation and DFT-calculated chemical shifts combined with DP4+ statistical and J-DP4 probability analyses allowed for the complete characterization of compound 1. The presence of compound 1 in a plant that biosynthesizes 2,2-dimethylchromenes is noteworthy, because an epoxy derivative has long been postulated as the reaction intermediate from the prenylated p-hydroxyacetophenones to cyclic dimethylchromenes. So far, this key intermediate has not been isolated, due to its purported chemical instability. Thus, this is the first report of a potential epoxide intermediate, leading to any of the chromene constituents of this plant. Compounds 1-9 inhibited yeast α-glucosidase with IC50 values ranging from 0.79 to 460 μM (acarbose, IC50 = 278.7 μM). The most active compounds were quercetagetin-7-O-(6-O-caffeoyl-β-d-glucopyranoside (3) and 6-hydroxykaempferol-7-O-(6-O-caffeoyl-β-d-glucopyranoside (4). Kinetic analysis of 3 revealed its mixed-type inhibitor nature. Docking studies into the crystallographic structure of yeast α-glucosidase (pdb 3A4A) predicted that 3 and 4 bind at the catalytic site of the enzyme.
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Affiliation(s)
| | - Araceli Pérez-Vásquez
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, México
| | - Rafael Torres-Colín
- Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad de México 04510, México
| | - Manuel Rangel-Grimaldo
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, México
| | - Daniela Rebollar-Ramos
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, México
| | - Rachel Mata
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, México
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de Moraes MM, Kato MJ. Biosynthesis of Pellucidin A in Peperomia pellucida (L.) HBK. FRONTIERS IN PLANT SCIENCE 2021; 12:641717. [PMID: 33828573 PMCID: PMC8020151 DOI: 10.3389/fpls.2021.641717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 02/22/2021] [Indexed: 05/08/2023]
Abstract
Peperomia pellucida (L.) HBK (Piperaceae) ("jabuti herb") is an herbaceous plant that is widespread in the tropics and has several ethnomedicinal uses. The phytochemical study of leaf extracts resulted in the isolation of 2,4,5-trimethoxycinnamic acid, 5,6,7-trimethoxyflavone, 2,4,5-trimethoxystyrene, 2,4,5-trimethoxybenzaldehyde, dillapiol, and sesamin in addition to pellucidin A. The co-occurrence of styrene and cyclobutane dimers suggested the formation of pellucidin A by a photochemical [2+2] cycloaddition of two molecules of 2,4,5-trimethoxystyrene. To investigate this biogenesis, analysis of plant leaves throughout ontogeny and treatments such as drought, herbivory and, exposure to jasmonic acid and UV365 light were carried out. Significant increases in the content of dillapiol (up to 86.0%) were found when P. pellucida plants were treated with jasmonic acid, whereas treatment under UV365 light increase the pellucidin A content (193.2%). The biosynthetic hypothesis was examined by feeding various 13C-labeled precursors, followed by analysis with GC-MS, which showed incorporation of L-(2-13C)-phenylalanine (0.72%), (8-13C)-cinnamic acid (1.32%), (8-13C)-ferulic acid (0.51%), (8-13C)-2,4,5-trimethoxycinnamic acid (7.5%), and (8-13C)-2,4,5-trimethoxystyrene (12.8%) into pellucidin A. The enzymatic conversion assays indicated decarboxylation of 2,4,5-trimethoxycinnamic acid into 2,4,5-trimethoxystyrene, which was subsequently dimerized into pellucidin A under UV light. Taken together, the biosynthesis of pellucidin A in P. pellucida involves a sequence of reactions starting with L-phenylalanine, cinnamic acid, ferulic acid, 2,4,5-trimethoxycinnamic acid, which then decarboxylates to form 2,4,5-trimethoxystyrene and then is photochemically dimerized to produce pellucidin A.
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Affiliation(s)
| | - Massuo J. Kato
- Institute of Chemistry, University of São Paulo, São Paulo, Brazil
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8
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Galvez-Llompart M, Zanni R, Galvez J, Garcia-Domenech R. Molecular Topology QSAR Strategy for Crop Protection: New Natural Fungicides with Chitin Inhibitory Activity. ACS OMEGA 2020; 5:16358-16365. [PMID: 32685798 PMCID: PMC7364431 DOI: 10.1021/acsomega.0c00177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 03/23/2020] [Indexed: 05/11/2023]
Abstract
Nowadays, crop protection is a major concern and how to proceed is a delicate point of contention. New products must be safe and ecofriendly in accordance with the actual legislation. In this context, we present a quantitative structure-activity relationship strategy based on molecular topology as a tool for generating natural products as potential fungicides following a mechanism of action based on the synthesis of chitin inhibition (chitinase inhibition). Two discriminant equations using statistical linear discriminant analysis were used to identify three potential candidates (1-methylxanthine, hematommic acid, and antheraxanthin). The equations showed accuracy and specificity levels above 80%, minimizing the risk of selecting false active compounds.
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Affiliation(s)
- Maria Galvez-Llompart
- Instituto
de Tecnologia Quimica, UPV-CSIC, Universidad
Politecnica de Valencia, Avenida de los Naranjos s/n, Valencia E-46022, Spain
- Molecular
Topology and Drug Design Unit, Department of Physical Chemistry, University of Valencia, Valencia 46010, Spain
| | - Riccardo Zanni
- Departamento
de Microbiologia, Facultad de Ciencias, Universidad de Malaga, Bulevar Louis Pasteur 31, Malaga 29071, Spain
- Molecular
Topology and Drug Design Unit, Department of Physical Chemistry, University of Valencia, Valencia 46010, Spain
| | - Jorge Galvez
- Molecular
Topology and Drug Design Unit, Department of Physical Chemistry, University of Valencia, Valencia 46010, Spain
| | - Ramon Garcia-Domenech
- Molecular
Topology and Drug Design Unit, Department of Physical Chemistry, University of Valencia, Valencia 46010, Spain
- . Phone: +34-963544291
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Al-Madhagi WM, Hashim NM, Awadh Ali NA, Taha H, Alhadi AA, Abdullah AA, Sharhan O, Othman R. Bioassay-Guided Isolation and in Silico Study of Antibacterial Compounds From Petroleum Ether Extract of Peperomia blanda (Jacq.) Kunth. J Chem Inf Model 2019; 59:1858-1872. [PMID: 31117526 DOI: 10.1021/acs.jcim.8b00969] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bioassay-guided isolation protocol was performed on petroleum ether extract of Peperomia blanda (Jacq.) Kunth using column chromatographic techniques. Five compounds were isolated and their structures were elucidated via one-dimensional (1D) and two-dimensional (2D) NMR, gas chromatography mass sectroscopy (GCMS), liquid chromatography mass spectroscopy (LCMS), and ultraviolet (UV) and infrared (IR) analyses. Dindygulerione E (a new compound), and two compounds isolated from P. blanda for the first time-namely, dindygulerione A and flavokawain A-are reported herein. Antimicrobial activity was screened against selected pathogenic microbes, and minimum inhibitory concentrations (MIC) were recorded within the range of 62-250 μg/mL. Assessment of the pharmacotherapeutic potential has also been done for the isolated compounds, using the Prediction of Activity spectra for Substances (PASS) software, and different activities of compounds were predicted. Molecular docking, molecular dynamics simulation and molecular mechanics/Poisson-Boltzmann Surface Area (MM-PBSA) calculations have proposed the binding affinity of these compounds toward methylthioadenosine phosphorylase enzyme, which may explain their inhibitory actions.
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Affiliation(s)
- Wafa M Al-Madhagi
- Pharmacy Department, Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia.,Department of Pharmaceutical Medicinal and Organic Chemistry, Faculty of Pharmacy , Sana'a University , 31220 Sana'a , Yemen
| | - Najihah Mohd Hashim
- Pharmacy Department, Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia.,Center for Natural Products Research and Drug Discovery (CENAR) , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Nasser A Awadh Ali
- Department of Pharmacognosy, Faculty of Pharmacy , Sana'a University , 31220 Sana'a , Yemen
| | - Hairin Taha
- Institute of Energy Infrastructure , Universiti Tenaga Nasional , 43000 Selangor , Malaysia
| | - Abeer A Alhadi
- Pharmacy Department, Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia.,Drug Design and Development Research Group (DDDRG) , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Adib A Abdullah
- Pharmacy Department, Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia.,Drug Design and Development Research Group (DDDRG) , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Olla Sharhan
- Chemistry Department, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia.,Chemistry Department, Faculty of Education , Dhamar University , 87246 Dhamar , Yemen
| | - Rozana Othman
- Pharmacy Department, Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia.,Center for Natural Products Research and Drug Discovery (CENAR) , University of Malaya , 50603 Kuala Lumpur , Malaysia.,Drug Design and Development Research Group (DDDRG) , University of Malaya , 50603 Kuala Lumpur , Malaysia
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Vásquez-Ocmín P, Haddad M, Gadea A, Jullian V, Castillo D, Paloque L, Cerapio JP, Bourdy G, Sauvain M. A new phthalide derivative from Peperomia nivalis. Nat Prod Res 2016; 31:138-142. [DOI: 10.1080/14786419.2016.1219857] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Pedro Vásquez-Ocmín
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Mohamed Haddad
- UMR 152 Pharma Dev, Université de Toulouse, IRD, UPS, Toulouse, France
| | - Alice Gadea
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Valérie Jullian
- UMR 152 Pharma Dev, Université de Toulouse, IRD, UPS, Toulouse, France
| | - Denis Castillo
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Lucie Paloque
- CNRS, LCC (Laboratoire de Chimie de Coordination) UPR8241, Toulouse, France
- Université de Toulouse, Toulouse, France
| | - Juan Pablo Cerapio
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Geneviève Bourdy
- UMR 152 Pharma Dev, Université de Toulouse, IRD, UPS, Toulouse, France
| | - Michel Sauvain
- UMR 152 Pharma Dev, Université de Toulouse, IRD, UPS, Toulouse, France
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(S)-2-Methyl-2-(4-methylpent-3-enyl)-6-(propan-2-ylidene)-3,4,6,7-tetrahydropyrano[4,3-g]chromen-9(2H)-one. MOLBANK 2015. [DOI: 10.3390/m855] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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12
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Ferreira EA, Reigada JB, Correia MV, Young MCM, Guimarães EF, Franchi GC, Nowill AE, Lago JHG, Yamaguchi LF, Kato MJ. Antifungal and cytotoxic 2-acylcyclohexane-1,3-diones from Peperomia alata and P. trineura. JOURNAL OF NATURAL PRODUCTS 2014; 77:1377-1382. [PMID: 24905499 DOI: 10.1021/np500130x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bioactivity-guided fractionation of the separate CH2Cl2 extracts from the aerial parts of Peperomia alata and P. trineura yielded seven polyketides: alatanone A [3-hydroxy-2-(5'-phenylpent-4'E-enoyl)cyclohex-2-en-1-one, 1a] and alatanone B [3-hydroxy-2-(3'-phenyl-6'-methylenedioxypropanoyl)cyclohex-2-en-1-one, 2a] from P. alata and trineurone A [3-hydroxy-2-(11'-phenylundec-10'E-enoyl)cyclohex-2-en-1-one, 1b], trineurone B [3-hydroxy-2-(15'-phenyl-18'-methylenedioxypentadecanoyl)cyclohex-2-en-1-one, 2b], trineurone C [3-hydroxy-2-(17'-phenyl-20'-methylenedioxyheptadecanoyl)cyclohex-2-en-1-one, 2c], trineurone D [3-hydroxy-2-(hexadec-10'Z-enoyl)cyclohex-2-en-1-one, 3a], and trineurone E [(6R)-(+)-3,6-dihydroxy-2-(hexadec-10'Z-enoyl)cyclohex-2-en-1-one, 3b] from P. trineura. The isolated compounds were evaluated for antifungal activity against Cladosporium cladosporioides and C. sphaeospermum and for cytotoxicity against the K562 and Nalm-6 leukemia cell lines.
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Affiliation(s)
- Edgard A Ferreira
- Research Support Center in Molecular Diversity of Natural Products, Institute of Chemistry, University of São Paulo , 05508-000, São Paulo, SP, Brazil
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Wan Y, Wang C, Wang HY, Zhao LL, Zhang XX, Shi JJ, Huang SY, Liu GX, Wu H. Efficient One-Pot Syntheses of 7-Alkyl-6H,7H-naphtho[1,2:5,6]pyrano-[3,2-c]chromen-6-ones by 1-Methyl-3-(2-(sulfooxy)ethyl)-1H-imidazol-3-ium Chloride. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.1658] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yu Wan
- Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province; Xuzhou 221116 People's Republic of China
| | - Chao Wang
- School of Chemistry and Chemical Engineering; Xuzhou Normal University; Xuzhou 221116 People's Republic of China
| | - Hai-ying Wang
- School of Chemistry and Chemical Engineering; Xuzhou Normal University; Xuzhou 221116 People's Republic of China
- Key Laboratory of Green synthesis of functional material of Jiangsu Province; Xuzhou 221116 People's Republic of China
| | - Ling-ling Zhao
- School of Chemistry and Chemical Engineering; Xuzhou Normal University; Xuzhou 221116 People's Republic of China
- Key Laboratory of Green synthesis of functional material of Jiangsu Province; Xuzhou 221116 People's Republic of China
| | - Xiao-xiao Zhang
- School of Chemistry and Chemical Engineering; Xuzhou Normal University; Xuzhou 221116 People's Republic of China
| | - Jing-jing Shi
- School of Chemistry and Chemical Engineering; Xuzhou Normal University; Xuzhou 221116 People's Republic of China
| | - Shu-ying Huang
- School of Chemistry and Chemical Engineering; Xuzhou Normal University; Xuzhou 221116 People's Republic of China
| | - Gui-Xiang Liu
- School of Chemistry and Chemical Engineering; Xuzhou Normal University; Xuzhou 221116 People's Republic of China
| | - Hui Wu
- School of Chemistry and Chemical Engineering; Xuzhou Normal University; Xuzhou 221116 People's Republic of China
- Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province; Xuzhou 221116 People's Republic of China
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Puhl MCMN, Cortez DAG, Ueda-Nakamura T, Nakamura CV, Filho BPD. Antimicrobial activity of Piper gaudichaudianum Kuntze and its synergism with different antibiotics. Molecules 2011; 16:9925-38. [PMID: 22134399 PMCID: PMC6264199 DOI: 10.3390/molecules16129925] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 11/06/2011] [Accepted: 11/14/2011] [Indexed: 11/16/2022] Open
Abstract
One of the oldest forms of medical practice is the use of plants for the treatment and prevention of diseases that affect humans. We have studied the antimicrobial activity and synergism of Piper gaudichaudianum Kuntze with different antibiotics. The crude extract from the leaves of P. gaudichaudianum was submitted to chromatographic separation, resulting in five fractions. Fraction F3 contained a chromone (2,2-dimethyl-6-carboxycroman-4-one), and fraction F2 contained isomers that are prenylated derivatives of benzoic acid [4-hydroxy-(3',7'-dimethyl-1'-oxo-octa-E-2'-6'-dienyl)benzoic acid and 4-hydroxy-(3',7'-dimethyl-1'-oxo-octa-2'-Z-6'-dienyl) benzoic acid]. The chemical structures of both compounds were determined by analysis of ¹H-NMR, ¹³C-NMR, COZY, DEPT, HMQC, and HMBC spectral data, and by comparison with data in the literature. The crude extract, fraction F2, and fraction F3 showed good activity against Staphylococcus aureus, Bacillus subtilis, and Candida tropicalis. The two benzoic acid derivatives only showed activity against S. aureus and B. subtilis. The bioauthographic analysis showed an inhibition zone only in fraction F2. Fractions F2 and F3 showed synergism in combination with ceftriaxone, tetracycline, and vancomycin. Morphological changes in form and structure were found by scanning electron microscopy in S. aureus treated with the combination of fraction F2 with vancomycin.
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Affiliation(s)
| | | | - Tânia Ueda-Nakamura
- Departamento de Ciências Básicas da Saúde, Universidade Estadual de Maringá, PR. CEP 87020-900 Brazil; (T.U.N.); (C.V.N.)
| | - Celso Vataru Nakamura
- Departamento de Ciências Básicas da Saúde, Universidade Estadual de Maringá, PR. CEP 87020-900 Brazil; (T.U.N.); (C.V.N.)
| | - Benedito Prado Dias Filho
- Departamento de Ciências Básicas da Saúde, Universidade Estadual de Maringá, PR. CEP 87020-900 Brazil; (T.U.N.); (C.V.N.)
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Wang X, Lu G, Yan F, Ma W, Wu L. Zr(HSO4)4-catalyzed one-pot three-component synthesis of 7-alkyl-6H,7H-naphtho[1′,2′:5,6]pyrano[3,2-c]chromen-6-ones. J Heterocycl Chem 2011. [DOI: 10.1002/jhet.755] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Mota JDS, Leite AC, Kato MJ, Young MCM, Bolzani VDS, Furlan M. Isoswertisin flavones and other constituents fromPeperomia obtusifolia. Nat Prod Res 2011; 25:1-7. [DOI: 10.1080/14786410903244954] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Reusable melamine trisulfonic acid-catalyzed three-component synthesis of 7-alkyl-6H,7H-naphtho[1′,2′:5,6]pyrano[3,2-c]chromen-6-ones. MONATSHEFTE FUR CHEMIE 2010. [DOI: 10.1007/s00706-010-0427-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Helal MH, Ali GAMEH, Ali AA, Ammar YA. One-Step Synthesis of Chromene-3-Carboxamide, Bischromene, Chromeno[3,4-c]Pyridine and Bischromeno[3,4-c]Pyridine Derivatives for Antimicrobial Evaluation. JOURNAL OF CHEMICAL RESEARCH 2010. [DOI: 10.3184/030823410x12812852410870] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cyanoacetamide derivatives were reacted with salicylaldehyde under different conditions afforded chromenes and coumarin derivatives respectively. A number of chromeno[3,4- c]pyridine derivatives were prepared from the reaction of N-cyclohexyl-2-imino-2H-chromene-3-carboxamide with malononitrile and/or cynaothiocatemaide. Bischromeno[3,4- c]pyridine derivatives were prepared from the reaction of N,N’-(ethane-1,2-diyl)bis(2-imino-2H-chromene-3-carboxamide) with malononitrile and/or N-alkyl-2-cyanoacetamide derivative with 2-iminochroemen derivative, respectively. Some of these compounds were screened for their antimicrobial activities.
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Affiliation(s)
- Mohamed H. Helal
- Chemistry Department, Faculty of Science, Al-Azhar University, 11284 Nasr City, Cairo, Egypt
| | - Gameel A. M. El-Hag Ali
- Chemistry Department, Faculty of Science, Al-Azhar University, 11284 Nasr City, Cairo, Egypt
| | - Ahmed A. Ali
- Chemistry Department, Faculty of Science, Al-Azhar University, 11284 Nasr City, Cairo, Egypt
| | - Yousry A. Ammar
- Chemistry Department, Faculty of Science, Al-Azhar University, 11284 Nasr City, Cairo, Egypt
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19
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López SN, Lopes AA, Batista JM, Flausino O, Bolzani VDS, Kato MJ, Furlan M. Geranylation of benzoic acid derivatives by enzymatic extracts from Piper crassinervium (Piperaceae). BIORESOURCE TECHNOLOGY 2010; 101:4251-4260. [PMID: 20185304 DOI: 10.1016/j.biortech.2010.01.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2009] [Revised: 01/07/2010] [Accepted: 01/12/2010] [Indexed: 05/28/2023]
Abstract
The ability to carry out geranylations on aromatic substrates using enzymatic extracts from the leaves of Piper crassinervium (Piperaceae) was evaluated. A literature analysis pointed out its importance as a source of prenylated bioactive molecules. The screening performed on aromatic acceptors (benzoic acids, phenols and phenylpropanoids) including geranyl diphosphate as prenyl donor, showed the biotransformation of the 3,4-dihydroxybenzoic acid by the crude extract, and the p-hydroxybenzoic acid by both the microsomal fraction and the crude extract, after treating leaves with glucose. The analysis of the products allowed the identification of C- and O-geranylated derivatives, and the protease (subtilisin and pepsin) inhibition performed on the O-geranylated compounds showed weak inhibition. Electrophoretic profiles indicated the presence of bands/spots among 56-58 kDa and pI 6-7, which are compatible with prenyltransferases. These findings show that P. crassinervium could be considered as a source of extracts with geranyltransferase activity to perform biotransformations on aromatic substrates.
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Affiliation(s)
- Silvia Noelí López
- NuBBE - Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais, Departamento de Química Orgânica, Instituto de Química, Universidade Estadual Paulista, UNESP, C.P. 355, 14800-900 Araraquara, SP, Brazil
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20
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Velozo LSM, Ferreira MJP, Santos MIS, Moreira DL, Guimarães EF, Emerenciano VP, Kaplan MAC. C-glycosyl flavones from Peperomia blanda. Fitoterapia 2008; 80:119-22. [PMID: 19100817 DOI: 10.1016/j.fitote.2008.11.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Revised: 11/20/2008] [Accepted: 11/24/2008] [Indexed: 10/21/2022]
Abstract
The methanol extract from aerial parts of the Peperomia blanda (Piperaceae) yielded two C-glycosyl-flavones. Their structures were elucidated on the basis of extensive spectroscopic analysis, including 1D and 2D NMR, chemical transformation and comparison with the related known compounds. The structure of the new flavonoids were established as 4'-methoxy-vitexin 7-O-beta-D-xylopyranoside (1) (7-O-beta-D-xylopyranosyl-8-C-beta-D-glucopyranosyl-4'-methoxy-apigenin) and vicenin-2 (2). The antioxidant activity of both compounds was investigated using the DPPH assay. Both compounds showed only modest activity, with IC50 values of 357.2 microM for 1, and 90.5 microM for 2.
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Affiliation(s)
- Leosvaldo S M Velozo
- Núcleo de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, 21941-590, Rio de Janeiro, Brazil
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Felippe LG, Baldoqui DC, Kato MJ, Bolzani VDS, Guimarães EF, Cicarelli RMB, Furlan M. Trypanocidal tetrahydrofuran lignans from Peperomia blanda. PHYTOCHEMISTRY 2008; 69:445-50. [PMID: 17888465 DOI: 10.1016/j.phytochem.2007.08.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2007] [Revised: 07/26/2007] [Accepted: 08/08/2007] [Indexed: 05/17/2023]
Abstract
Five tetrahydrofuran lignans and two known flavones were isolated from the aerial parts of Peperomia blanda. The structures of the isolated lignans were elucidated by interpretation of their spectroscopic data, including by gHMQC and gHMBC. The relative and absolute configurations of the isolates were determined from NOESY interactions and optical properties, respectively. Four of the lignans were diastereomeric whilst one was of mixed biosynthetic origin. All but one of the lignans exhibited high in vitro trypanocidal activity when assayed against epimastigotes of Trypanosoma cruzi strain Y.
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Abstract
The chemistry of members of the family Piperaceae is of great interest owing to the variety of biological properties displayed. A survey of structural diversity and bioactivity reveals that groups of species specialize in the production of amides, phenylpropanoids, lignans and neolignans, benzoic acids and chromenes, alkaloids, polyketides, and a plethora of compounds of mixed biosynthetic origin. Bioassays againstCladosporium cladosporioidesandC. sphaerospermunhave resulted in the characterization of various amides, prenylated phenolic compounds, and polyketides as potential classes of antifungal agents. Studies on the developmental process in seedlings ofPiper solmsianumhave shown that phenylpropanoid are produced instead of the tetrahydrofuran lignans found in adult plants. In suspension cultures ofP. cernuumandP. crassinervium, phenylethylamines and alkamides predominate, whereas in the adult plants prenylpropanoids and prenylated benzoic acids are the respective major compound classes. Knowledge of the chemistry, bioactivity, and ecology of Piperaceae species provides preliminary clues for an overall interpretation of the possible role and occurrence of major classes of compounds.
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Gentili PL, Ortica F, Romani A, Favaro G. Effects of Proximity on the Relaxation Dynamics of Flindersine and 6(5H)-Phenanthridinone. J Phys Chem A 2006; 111:193-200. [PMID: 17214453 DOI: 10.1021/jp0646426] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The role played by the carbonyl group in the antenna system of a naturally occurring photochromic chromene, flindersine (FL), has been experimentally investigated and compared with that of a carbonyl group present in a structurally related unreactive heterocyclic compound, 6(5H)-phenanthridinone (PH). Through stationary and time-resolved absorption and emission techniques, the excited-state relaxation dynamics after UV irradiation were determined for FL and PH. The presence of a carbonyl group in both compounds entails the existence of two close-lying, strongly coupled electronic excited states, having n,pi* and pi,pi* character, respectively. Their coupling can be modulated by a careful choice of the solvent proticity and temperature. Moreover, in the case of strong coupling between the n,pi* and pi,pi* states, we have proved that the relaxation dynamics can involve transitions in which the upper of the coupled states acts as an intermediate for radiationless decay, bypassing the lowest emissive state, whereby the fluorescence quantum yield becomes a function of the excitation wavelength.
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