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Hou SH, Zhou FF, Sun YH, Li QZ. Deconstructive and Divergent Synthesis of Bioactive Natural Products. Molecules 2023; 28:6193. [PMID: 37687022 PMCID: PMC10488409 DOI: 10.3390/molecules28176193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/18/2023] [Accepted: 08/20/2023] [Indexed: 09/10/2023] Open
Abstract
Natural products play a key role in innovative drug discovery. To explore the potential application of natural products and their analogues in pharmacology, total synthesis is a key tool that provides natural product candidates and synthetic analogues for drug development and potential clinical trials. Deconstructive synthesis, namely building new, challenging structures through bond cleavage of easily accessible moieties, has emerged as a useful design principle in synthesizing bioactive natural products. Divergent synthesis, namely synthesizing many natural products from a common intermediate, can improve the efficiency of chemical synthesis and generate libraries of molecules with unprecedented structural diversity. In this review, we will firstly introduce five recent and excellent examples of deconstructive and divergent syntheses of natural products (2021-2023). Then, we will summarize our previous work on the deconstructive and divergent synthesis of natural products to demonstrate the high efficiency and simplicity of these two strategies in the field of total synthesis.
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Affiliation(s)
- Si-Hua Hou
- Shanghai Key Laboratory of Chiral Drugs and Engineering, College of Pharmaceutical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China; (F.-F.Z.); (Y.-H.S.); (Q.-Z.L.)
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2
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Kumar G, C A. Natural products and their analogues acting against Mycobacterium tuberculosis: A recent update. Drug Dev Res 2023; 84:779-804. [PMID: 37086027 DOI: 10.1002/ddr.22063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 02/28/2023] [Accepted: 04/01/2023] [Indexed: 04/23/2023]
Abstract
Tuberculosis (TB) remains one of the deadliest infectious diseases caused by Mycobacterium tuberculosis (M.tb). It is responsible for significant causes of mortality and morbidity worldwide. M.tb possesses robust defense mechanisms against most antibiotic drugs and host responses due to their complex cell membranes with unique lipid molecules. Thus, the efficacy of existing front-line drugs is diminishing, and new and recurring cases of TB arising from multidrug-resistant M.tb are increasing. TB begs the scientific community to explore novel therapeutic avenues. A precise knowledge of the compounds with their mode of action could aid in developing new anti-TB agents that can kill latent and actively multiplying M.tb. This can help in the shortening of the anti-TB regimen and can improve the outcome of treatment strategies. Natural products have contributed several antibiotics for TB treatment. The sources of anti-TB drugs/inhibitors discussed in this work are target-based identification/cell-based and phenotypic screening from natural products. Some of the recently identified natural products derived leads have reached clinical stages of TB drug development, which include rifapentine, CPZEN-45, spectinamide-1599 and 1810. We believe these anti-TB agents could emerge as superior therapeutic compounds to treat TB over known Food and Drug Administration drugs.
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Affiliation(s)
- Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Telangana, India
| | - Amrutha C
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Telangana, India
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3
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Zhang C, Lum KY, Taki AC, Gasser RB, Byrne JJ, Montaner LJ, Tietjen I, Avery VM, Davis RA. Using a Bioactive Eremophila-Derived Serrulatane Scaffold to Generate a Unique Carbamate Library for Anti-infective Evaluations. JOURNAL OF NATURAL PRODUCTS 2023; 86:557-565. [PMID: 36799121 DOI: 10.1021/acs.jnatprod.2c01041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The known Eremophila microtheca-derived diterpenoid 3,7,8-trihydroxyserrulat-14-en-19-oic acid (1) was targeted for large-scale purification, as this bioactive plant compound has proven to be an attractive scaffold for semisynthetic studies and subsequent library generation. Compound 1 was converted to a selectively protected trimethyl derivative, 3-hydroxy-7,8-dimethoxyserrulat-14-en-19-oic acid methyl ester (2), using simple and rapid methylation conditions. The resulting scaffold 2 was reacted with a diverse series of commercially available isocyanates to generate an 11-membered carbamate-based library. The chemical structures of the 11 new semisynthetic analogues were fully characterized by spectroscopic and spectrometric analysis. All natural products and semisynthetic compounds were evaluated for their anthelmintic, antimalarial, and anti-HIV activities. Compound 3 was shown to elicit the greatest antiplasmodial activity of all compounds tested, with IC50 values of 4.6 and 11.6 μM against Plasmodium falciparum 3D7 and Dd2, respectively. Compound 11 showed the greatest inhibition of development to fourth-stage Haemonchus contortus larvae (L4) and induction of a skinny (Ski) phenotype (67.5% of nematodes) at 50 μM. Compound 7, which inhibited 59.0% of HIV production at 100 μg/mL, was the carbamate analogue that displayed the best antiviral activity.
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Affiliation(s)
- Chen Zhang
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Kah Yean Lum
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Aya C Taki
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Robin B Gasser
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Joseph J Byrne
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Luis J Montaner
- The Wistar Institute, Philadelphia, Pennsylvania 19104, United States
| | - Ian Tietjen
- The Wistar Institute, Philadelphia, Pennsylvania 19104, United States
| | - Vicky M Avery
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
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4
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Raza S, Miller M, Hamberger B, Vermaas JV. Plant Terpenoid Permeability through Biological Membranes Explored via Molecular Simulations. J Phys Chem B 2023; 127:1144-1157. [PMID: 36717085 PMCID: PMC9923751 DOI: 10.1021/acs.jpcb.2c07209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Plants synthesize small molecule diterpenes composed of 20 carbons from precursor isopentenyl diphosphate and dimethylallyl disphosphate, manufacturing diverse compounds used for defense, signaling, and other functions. Industrially, diterpenes are used as natural aromas and flavoring, as pharmaceuticals, and as natural insecticides or repellents. Despite diterpene ubiquity in plant systems, it remains unknown how plants control diterpene localization and transport. For many other small molecules, plant cells maintain transport proteins that control compound compartmentalization. However, for most diterpene compounds, specific transport proteins have not been identified, and so it has been hypothesized that diterpenes may cross biological membranes passively. Through molecular simulation, we study membrane transport for three complex diterpenes from among the many made by members of the Lamiaceae family to determine their permeability coefficient across plasma membrane models. To facilitate accurate simulation, the intermolecular interactions for leubethanol, abietic acid, and sclareol were parametrized through the standard CHARMM methodology for incorporation into molecular simulations. To evaluate the effect of membrane composition on permeability, we simulate the three diterpenes in two membrane models derived from sorghum and yeast lipidomics data. We track permeation events within our unbiased simulations, and compare implied permeation coefficients with those calculated from Replica Exchange Umbrella Sampling calculations using the inhomogeneous solubility diffusion model. The diterpenes are observed to permeate freely through these membranes, indicating that a transport protein may not be needed to export these small molecules from plant cells. Moreover, the permeability is observed to be greater for plant-like membrane compositions when compared against animal-like membrane models. Increased permeability for diterpene molecules in plant membranes suggest that plants have tailored their membranes to facilitate low-energy transport processes for signaling molecules.
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Affiliation(s)
- Saad Raza
- Plant
Research Laboratory, College of Natural Science, Michigan State University, East LansingMichigan48824, United States
| | - Mykayla Miller
- Department
of Chemistry and Biochemistry, California
State University, Fullerton, Fullerton, California92831, United States
| | - Björn Hamberger
- Department
Of Biochemistry and Molecular Biology, College of Natural Science, Michigan State University, East LansingMichigan48824, United States
| | - Josh V. Vermaas
- Plant
Research Laboratory, College of Natural Science, Michigan State University, East LansingMichigan48824, United States,Department
Of Biochemistry and Molecular Biology, College of Natural Science, Michigan State University, East LansingMichigan48824, United States,E-mail: . Phone: +1 (517) 884-6937
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5
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Varela K, Al Mahmud H, Arman HD, Martinez LR, Wakeman CA, Yoshimoto FK. Autoxidation of a C2-Olefinated Dihydroartemisinic Acid Analogue to Form an Aromatic Ring: Application to Serrulatene Biosynthesis. JOURNAL OF NATURAL PRODUCTS 2022; 85:951-962. [PMID: 35357832 PMCID: PMC9035337 DOI: 10.1021/acs.jnatprod.1c01101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Dihydroartemisinic acid (DHAA) is a plant natural product that undergoes a spontaneous endoperoxide-forming cascade reaction to yield artemisinin in the presence of air. The endoperoxide functional group gives artemisinin its biological activity that kills Plasmodium falciparum, the parasite that causes malaria. To enhance our understanding of the mechanism of this cascade reaction, 2,3-didehydrodihydroartemisinic acid (2,3-didehydro-DHAA), a DHAA derivative with a double bond at the C2-position, was synthesized. When 2,3-didehydro-DHAA was exposed to air over time, instead of forming an endoperoxide, this compound predominantly underwent aromatization. This olefinated DHAA analogue reveals the requirement of a monoalkene functional group to initiate the endoperoxide-forming cascade reaction to yield artemisinin from DHAA. In addition, this aromatization process was exploited to illustrate the autoxidation process of a different plant natural product, dihydroserrulatene, to form the aromatic ring in serrulatene. This spontaneous aromatization process has applications in other natural products such as leubethanol and erogorgiaene. Due to their similarity in structure to antimicrobial natural products, the synthesized compounds in this study were tested for biological activity. A group of the tested compounds had minimum inhibitory concentration (MIC) values ranging from 12.5 to 25 μg/mL against the bacterial pathogen Staphylococcus aureus and the fungal pathogen Cryptococcus neoformans.
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Affiliation(s)
- Kaitlyn Varela
- Department of Chemistry, The University of Texas at San Antonio (UTSA), San Antonio, Texas 78249, United States
| | - Hafij Al Mahmud
- Biological Sciences, Texas Tech University, Lubbock, Texas 79409, United States
| | - Hadi D Arman
- Department of Chemistry, The University of Texas at San Antonio (UTSA), San Antonio, Texas 78249, United States
| | - Luis R Martinez
- Department of Oral Biology, University of Florida College of Dentistry, Center for Immunology and Transplantation, Center for Translational Research in Neurodegenerative Disease, and The Emerging Pathogens Institute, Gainesville, Florida 32610, United States
| | - Catherine A Wakeman
- Biological Sciences, Texas Tech University, Lubbock, Texas 79409, United States
| | - Francis K Yoshimoto
- Department of Chemistry, The University of Texas at San Antonio (UTSA), San Antonio, Texas 78249, United States
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6
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coll toledano J. Pseudopterosins and Seco-Pseudopterosins: Compilation and Revision of Conflicting NMR Data, Names, Numbering Systems and Structural Elucidation. Nat Prod Commun 2022. [DOI: 10.1177/1934578x221079415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The present review is focussed on the structural elucidation of the bicyclic and tricyclic diterpenoid title compounds isolated from Pseudopterogorgia species, displaying a direct structural relationship with the biosynthetic precursor GGPP (regular isoprenoid skeletons). A compilation of 1H and 13C NMR spectroscopic data is presented grouped by similar spin systems. Apparent inconsistencies or potential missassignments are discussed, pointing out convenient revisions of data assignment to improve structure correlations. Some hemisynthetic intermediates in the structural elucidation process are included, as well as data of representative synthetic compounds.
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7
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Thabet AA, Ayoub IM, Youssef FS, Al Sayed E, Singab ANB. Essential oils from the leaves and flowers of Leucophyllum frutescens (Scrophulariaceae): phytochemical analysis and inhibitory effects against elastase and collagenase in vitro. Nat Prod Res 2021; 36:4704-4708. [PMID: 34753359 DOI: 10.1080/14786419.2021.2000981] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Leucophyllum frutescens (Scrophulariaceae) is a medicinal plant of Mexican traditional medicine. The aim of this study was to analyse the volatile components from the leaves and flowers by GC/MS and to assess their anti-aging activity for the first time. A total of 30 compounds were identified where 1-octen-3-ol (73.56%) and D-limonene (11.12%) represented the major ingredients in the leaves, while n-heneicosane (32.30%) and dehydroepingaione (15.15%) were the major components in the flowers. In vitro anti-aging activity was measured via assessing collagenase and elastase inhibition. Essential oils from the leaves and flowers showed potential collagenase inhibitory activity with IC50 of 55.7 and 47.4 µg/mL. However, the oils from the leaves and flowers showed moderate anti-elastase activity with IC50 of 60.8 and 97.7 µg/mL. Therefore, the oil of Leucophyllum frutescens could afford a promising natural anti-aging drug.
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Affiliation(s)
- Amany A Thabet
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Iriny M Ayoub
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Fadia S Youssef
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Eman Al Sayed
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Abdel Nasser B Singab
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt.,Faculty of Pharmacy, Center for Drug Discovery Research and Development, Ain Shams University, Cairo, Egypt
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8
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Zhang C, Lum KY, Taki AC, Gasser RB, Byrne JJ, Wang T, Blaskovich MAT, Register ET, Montaner LJ, Tietjen I, Davis RA. Design, synthesis and screening of a drug discovery library based on an Eremophila-derived serrulatane scaffold. PHYTOCHEMISTRY 2021; 190:112887. [PMID: 34339980 DOI: 10.1016/j.phytochem.2021.112887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/21/2021] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Chemical studies of the aerial parts of the Australian desert plant Eremophila microtheca afforded the targeted and known diterpenoid scaffolds, 3,7,8-trihydroxyserrulat-14-en-19-oic acid and 3-acetoxy-7,8-dihydroxyserrulat-14-en-19-oic acid. The most abundant serrulatane scaffold was converted to the poly-methyl derivatives, 3-hydroxy-7,8-dimethoxyserrulat-14-en-19-oic acid methyl ester and 3,7,8-trimethoxyserrulat-14-en-19-oic acid methyl ester using simple and rapid methylation conditions consisting of DMSO, NaOH and MeI at room temperature. Subsequently a 12-membered amide library was synthesised by reacting the methylated scaffolds with a diverse series of commercial primary amines. The chemical structures of the 12 undescribed semi-synthetic analogues were fully characterised following 1D/2D NMR, MS, UV, ECD and [α]D data analyses. All compounds were evaluated for their anthelmintic, anti-microbial and anti-viral activities. While none of the compounds significantly inhibited motility or development of the exsheathed third-stage larvae (xL3s) of a pathogenic ruminant parasite, Haemonchus contortus, the tri-methylated analogue induced a skinny phenotype in fourth-stage larvae (L4s) after seven days of treatment (IC50 = 14 μM). Anti-bacterial and anti-fungal activities were not observed at concentrations up to 20 μM. Activity against HIV latency reversal was tested in inducible, chronically-infected cells, with the tri-methylated analogue being the most active (EC50 = 38 μM).
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Affiliation(s)
- Chen Zhang
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Kah Yean Lum
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Aya C Taki
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Robin B Gasser
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Joseph J Byrne
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Tao Wang
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Mark A T Blaskovich
- Community for Open Antimicrobial Drug Discovery, Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | | | | | | | - Rohan A Davis
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia.
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9
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Minh Le T, Szakonyi Z. Enantiomeric Isopulegol as the Chiral Pool in the Total Synthesis of Bioactive Agents. CHEM REC 2021; 22:e202100194. [PMID: 34553822 DOI: 10.1002/tcr.202100194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/05/2021] [Indexed: 11/12/2022]
Abstract
Isopulegol, a pool of abundant chiral terpene, has long served as the starting material for the total synthesis of isopulegol-based drugs. As an inexpensive and versatile starting material, this compound continues to serve modern synthetic chemistry. This review highlights the total syntheses of terpenoids in the period from 1980 to 2020 in which with isopulegol applied as a building block.
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Affiliation(s)
- Tam Minh Le
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720, Szeged, Hungary.,Stereochemistry Research Group of the Hungarian Academy Science, Eötvös utca 6, H-6720, Szeged, Hungary
| | - Zsolt Szakonyi
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720, Szeged, Hungary.,Interdisciplinary Centre of Natural Products, University of Szeged, Eötvös utca 6, H-6720, Szeged, Hungary
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10
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Biological Potential of Silver Nanoparticles Mediated by Leucophyllum frutescens and Russelia equisetiformis Extracts. NANOMATERIALS 2021; 11:nano11082098. [PMID: 34443930 PMCID: PMC8401648 DOI: 10.3390/nano11082098] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/13/2021] [Accepted: 08/15/2021] [Indexed: 12/12/2022]
Abstract
Awareness about environmental concerns is increasing, specially the pollution resulting from nanoparticles (NPs) production, which has led to great interest in the usage of biogenic agents for their fabrication. The current investigation used eco-friendly organic phytomolecules from Leucophyllum frutescens and Russelia equisetiformis leaves extract for the first time in the fabrication of silver NPs from silver ions and further an assessment of their biological activities was performed. The leaves extract from both plant sources were used as capping and reducing agents and added to AgNO3. The mixtures were observed for colour changes, and after a stable dark brown colour was obtained, the NPs were separated and further investigated using dynamic light scattering, transmission electron microscopy and energy-dispersive X-ray spectroscopy. The Fourier transform infrared spectroscopy technique was employed to determine the active organic ingredients in the plant extracts. The prepared NPs were tested against three cell lines (two cancer ones and one normal control) and the effects observed using TEM and confocal laser scanning microscopy (LSM). Antibacterial activity against two Gram positive and two Gram negative species was examined and the synergistic effect of the ampicillin-NPs conjugate was studied. Findings showed successful conversion of Ag ions into L-AgNPs and R-AgNPs achieved using L.frutescens and R. equisetiformis extracts, respectively. A mean size of 112.9 nm for L-AgNPs and 151.7 nm for R-AgNPs and negative zeta potentials were noted. TEM analysis showed spherical NPs and EDS indicated Ag at 3 keV. Reduction in cancer cell viability with low half-maximal inhibitory concentrations was noted for both tested NPs. Structural changes and apoptotic features in the treated cancer cell lines were noted by TEM and cell death was confirmed by LSM. Furthermore, higher antibacterial activity was noticed against Gram positive compared with Gram negative bacteria as well as high synergistic effect was noted for the Amp-NPs conjugate, specially against Gram positive bacteria. The current investigation has thus developed an eco-friendly NPs synthesis route by applying plant extracts to efficiently produce NPs endowed with potential cytotoxic and antibacterial capacity, which therefore could be recommended as new approaches to overcome human diseases with minimal environmental impact.
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11
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del Río RE, Joseph-Nathan P. Vibrational Circular Dichroism Absolute Configuration of Natural Products From 2015 to 2019. Nat Prod Commun 2021. [DOI: 10.1177/1934578x21996166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Although demonstrated in 1975, vibrational circular dichroism (VCD) finally started to popularize during this century as a reliable tool to determine the absolute configuration (AC) of organic molecules. This research field continues to be a very dynamic one, in particular for the study of natural products which are a unlimited source of chiral molecules. It therefore turns of interest to summarize the accomplishments published in recent years and to comment on some eventual difficulties that emerged in rare cases to complete the AC determination task. Therefore the aim of this review is to update VCD results for the AC assignment of natural products published from 2015 to 2019, a period in which VCD was reported in some 126 publications involving almost 300 molecules. They are organized according the type of studied metabolite allowing an easily search. The molecules correspond to 28 monoterpenes concerning 17 papers, to 42 sesquiterpenes in 14 papers, to 51 diterpenes in 19 publications, to 5 other terpenoids in three papers, to 48 aromatic molecules in 15 reports, to 20 polyketides in 10 publications, to 27 miscellaneous formulas also in 10 papers, and to 76 nitrogen containing compounds, which include alkaloids and their synthetic analogs, in 38 articles. The landscape of reviewed molecules is quite wide as it goes from simple monoterpenes, like borneol or camphor, to very relevant biological molecules like the alkaloid cocaine or tadalafil samples to distinguish genuine and counterfeit Cialis®. In addition, 5 natural products and a simple derivative published outside the reviewed period, were used to illustrate some aspects of density functional theory calculations.
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Affiliation(s)
- Rosa E. del Río
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia, Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
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12
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Miller GP, Bhat WW, Lanier ER, Johnson SR, Mathieu DT, Hamberger B. The biosynthesis of the anti-microbial diterpenoid leubethanol in Leucophyllum frutescens proceeds via an all-cis prenyl intermediate. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 104:693-705. [PMID: 32777127 PMCID: PMC7649979 DOI: 10.1111/tpj.14957] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 06/17/2020] [Accepted: 07/16/2020] [Indexed: 05/04/2023]
Abstract
Serrulatane diterpenoids are natural products found in plants from a subset of genera within the figwort family (Scrophulariaceae). Many of these compounds have been characterized as having anti-microbial properties and share a common diterpene backbone. One example, leubethanol from Texas sage (Leucophyllum frutescens) has demonstrated activity against multi-drug-resistant tuberculosis. Leubethanol is the only serrulatane diterpenoid identified from this genus; however, a range of such compounds have been found throughout the closely related Eremophila genus. Despite their potential therapeutic relevance, the biosynthesis of serrulatane diterpenoids has not been previously reported. Here we leverage the simple product profile and high accumulation of leubethanol in the roots of L. frutescens and compare tissue-specific transcriptomes with existing data from Eremophila serrulata to decipher the biosynthesis of leubethanol. A short-chain cis-prenyl transferase (LfCPT1) first produces the rare diterpene precursor nerylneryl diphosphate, which is cyclized by an unusual plastidial terpene synthase (LfTPS1) into the characteristic serrulatane diterpene backbone. Final conversion to leubethanol is catalyzed by a cytochrome P450 (CYP71D616) of the CYP71 clan. This pathway documents the presence of a short-chain cis-prenyl diphosphate synthase, previously only found in Solanaceae, which is likely involved in the biosynthesis of other known diterpene backbones in Eremophila. LfTPS1 represents neofunctionalization of a compartment-switching terpene synthase accepting a novel substrate in the plastid. Biosynthetic access to leubethanol will enable pathway discovery to more complex serrulatane diterpenoids which share this common starting structure and provide a platform for the production and diversification of this class of promising anti-microbial therapeutics in heterologous systems.
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Affiliation(s)
- Garret P. Miller
- Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMIUSA
| | - Wajid Waheed Bhat
- Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMIUSA
| | - Emily R. Lanier
- Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMIUSA
| | - Sean R. Johnson
- Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMIUSA
| | - Davis T. Mathieu
- Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMIUSA
| | - Björn Hamberger
- Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMIUSA
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13
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Ndjoubi KO, Sharma R, Hussein AA. The Potential of Natural Diterpenes Against Tuberculosis: An Updated Review. Curr Pharm Des 2020; 26:2909-2932. [PMID: 32532186 DOI: 10.2174/1381612826666200612163326] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/28/2020] [Indexed: 11/22/2022]
Abstract
Every year, 10 million people are affected by tuberculosis (TB). Despite being a preventable and curable disease, 1.5 million people die from TB each year, making it the world's top infectious disease. Many of the frontline antibiotics cause painful and disagreeable side effects. To mitigate the side effects from the use of chemically synthesized or clinical anti-tubercular drugs, there are many research studies focussed on natural products as a source of potential anti-tuberculosis drugs. Among different phytoconstituents, several classes of diterpenoids exert significant antimicrobial effects. This review explores diterpenoids as potential anti-tubercular drugs from natural sources. A total of 204 diterpenoids isolated from medicinal plants and marine species are discussed that inhibit the growth of Mycobacterium tuberculosis. The literature from 1994-2018 is reviewed, and 158 diterpenoids from medicinal plants, as well as 40 diterpenoids from marines, are alluded to have antituberculosis properties. The antitubercular activities discussed in the review indicate that the type of diterpenoids, the Mtb strains, substituents attached to diterpenoids and their position in the diterpenoids general skeleton can change the compounds antimycobacterial inhibitory effects.
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Affiliation(s)
- Kadidiatou O Ndjoubi
- Chemistry Department, Cape Peninsula University of Technology, Bellville Campus, Symphony Road, 7535 Bellville, South Africa
| | - Rajan Sharma
- Chemistry Department, Cape Peninsula University of Technology, Bellville Campus, Symphony Road, 7535 Bellville, South Africa
| | - Ahmed A Hussein
- Chemistry Department, Cape Peninsula University of Technology, Bellville Campus, Symphony Road, 7535 Bellville, South Africa
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14
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Rios MY, Ocampo-Acuña YD, Ramírez-Cisneros MÁ, Salazar-Rios ME. Furofuranone Lignans from Leucophyllum ambiguum. JOURNAL OF NATURAL PRODUCTS 2020; 83:1424-1431. [PMID: 32239935 DOI: 10.1021/acs.jnatprod.9b00759] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Eight furofuranone lignans with an endo,endo relationship between the oxygen atoms, an exo,exo relationship between the aryl groups, and a chair,chair conformation (1-4 and 6-9), in addition to the α-amino acid (3S)-hydroxy-3',4'-dimethoxy-L-phenylalanine (5), veratric acid (10), and β-sitosterol (11), were isolated from the powdered and defatted air-dried aerial parts of Leucophyllum ambiguum. Four of these lignans, ciquitins A-D, 1-4, were isolated for the first time as natural products. The structures of these compounds were established based on their spectrometric/spectroscopic data. Additionally, single-crystal X-ray crystallography confirmed the structure of ciquitin A (1), and derivatization with (9S)-naproxen and X-ray diffraction crystallography data established its absolute configuration. Ciquitins A (1) and B (2) possess a 9-hydroxy group; this chemical characteristic grants these species conformational isomerism not seen in the other six lignans. The conformers of 1 and 2 are distinguishable via their 1H and 13C NMR spectroscopic data. This is the first report of this phenomenon, and hence, a complete assignment of the signals in both spectra of each conformer for each compound is presented. Compounds 1-9 were found to exhibit potent inhibitory activity in the 1.0 × 10-3 to 2.2 μM range against acetylcholinesterase, an enzyme directly involved in the etiology of Alzheimer's disease and senile dementia. Thus, these natural products are promising agents that are potentially useful for the treatment of neurological degeneration.
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Affiliation(s)
- María Y Rios
- Centro de Investigaciones Químicas, IICBA, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Morelos, México
| | - Yordin D Ocampo-Acuña
- Centro de Investigaciones Químicas, IICBA, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Morelos, México
| | - M Ángeles Ramírez-Cisneros
- Centro de Investigaciones Químicas, IICBA, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Morelos, México
| | - María E Salazar-Rios
- Facultad de Medicina, Universidad Autónoma del Estado de Morelos, Cuernavaca 62350, Morelos, México
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Hou SH, Prichina AY, Zhang M, Dong G. Asymmetric Total Syntheses of Di- and Sesquiterpenoids by Catalytic C-C Activation of Cyclopentanones. Angew Chem Int Ed Engl 2020; 59:7848-7856. [PMID: 32086872 PMCID: PMC7219654 DOI: 10.1002/anie.201915821] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Indexed: 11/06/2022]
Abstract
To show the synthetic utility of the catalytic C-C activation of less strained substrates, described here are the collective and concise syntheses of the natural products (-)-microthecaline A, (-)-leubehanol, (+)-pseudopteroxazole, (+)-seco-pseudopteroxazole, pseudopterosin A-F and G-J aglycones, and (+)-heritonin. The key step in these syntheses involve a Rh-catalyzed C-C/C-H activation cascade of 3-arylcyclopentanones, which provides a rapid and enantioselective route to access the polysubstituted tetrahydronaphthalene cores presented in these natural products. Other important features include 1) the direct C-H amination of the tetralone substrate in the synthesis of (-)-microthecaline A, 2) the use of phosphoric acid to enhance efficiency and regioselectivity for problematic cyclopentanone substrates in the C-C activation reactions, and 3) the direct conversion of serrulatane into amphilectane diterpenes by an allylic cyclodehydrogenation coupling.
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Affiliation(s)
- Si-Hua Hou
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
| | | | - Mengxi Zhang
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
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16
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Hou S, Prichina AY, Zhang M, Dong G. Asymmetric Total Syntheses of Di‐ and Sesquiterpenoids by Catalytic C−C Activation of Cyclopentanones. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915821] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Si‐Hua Hou
- Department of Chemistry University of Chicago Chicago IL 60637 USA
| | | | - Mengxi Zhang
- Department of Chemistry University of Chicago Chicago IL 60637 USA
| | - Guangbin Dong
- Department of Chemistry University of Chicago Chicago IL 60637 USA
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17
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Gericke O, Hansen NL, Pedersen GB, Kjaerulff L, Luo D, Staerk D, Møller BL, Pateraki I, Heskes AM. Nerylneryl diphosphate is the precursor of serrulatane, viscidane and cembrane-type diterpenoids in Eremophila species. BMC PLANT BIOLOGY 2020; 20:91. [PMID: 32111159 PMCID: PMC7049213 DOI: 10.1186/s12870-020-2293-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 02/17/2020] [Indexed: 05/05/2023]
Abstract
BACKGROUND Eremophila R.Br. (Scrophulariaceae) is a diverse genus of plants with species distributed across semi-arid and arid Australia. It is an ecologically important genus that also holds cultural significance for many Indigenous Australians who traditionally use several species as sources of medicines. Structurally unusual diterpenoids, particularly serrulatane and viscidane-types, feature prominently in the chemical profile of many species and recent studies indicate that these compounds are responsible for much of the reported bioactivity. We have investigated the biosynthesis of diterpenoids in three species: Eremophila lucida, Eremophila drummondii and Eremophila denticulata subsp. trisulcata. RESULTS In all studied species diterpenoids were localised to the leaf surface and associated with the occurrence of glandular trichomes. Trichome-enriched transcriptome databases were generated and mined for candidate terpene synthases (TPS). Four TPSs with diterpene biosynthesis activity were identified: ElTPS31 and ElTPS3 from E. lucida were found to produce (3Z,7Z,11Z)-cembratrien-15-ol and 5-hydroxyviscidane, respectively, and EdTPS22 and EdtTPS4, from E. drummondii and E. denticulata subsp. trisulcata, respectively, were found to produce 8,9-dihydroserrulat-14-ene which readily aromatized to serrulat-14-ene. In all cases, the identified TPSs used the cisoid substrate, nerylneryl diphosphate (NNPP), to form the observed products. Subsequently, cis-prenyl transferases (CPTs) capable of making NNPP were identified in each species. CONCLUSIONS We have elucidated two biosynthetic steps towards three of the major diterpene backbones found in this genus. Serrulatane and viscidane-type diterpenoids are promising candidates for new drug leads. The identification of an enzymatic route to their synthesis opens up the possibility of biotechnological production, making accessible a ready source of scaffolds for further modification and bioactivity testing.
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Affiliation(s)
- Oliver Gericke
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
| | - Nikolaj Lervad Hansen
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
| | - Gustav Blichfeldt Pedersen
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
| | - Louise Kjaerulff
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100, Copenhagen, Denmark
| | - Dan Luo
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100, Copenhagen, Denmark
| | - Birger Lindberg Møller
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
| | - Irini Pateraki
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark
| | - Allison Maree Heskes
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark.
- Center for Synthetic Biology "bioSYNergy", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark.
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18
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Chevtchouk Jurno A, Oliveira Corrêa Netto L, Silva Duarte R, Rocha Pinheiro Machado R. The search for plant activity against tuberculosis using breakpoints: A review. Tuberculosis (Edinb) 2019; 117:65-78. [PMID: 31378271 DOI: 10.1016/j.tube.2019.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/09/2019] [Accepted: 06/21/2019] [Indexed: 11/17/2022]
Abstract
The present study proposes a discussion about the use of breakpoints when plant derivatives are used for investigating potential agents against Mycobacterium tuberculosis strains. A systematic review on these aspects was performed and supported that an arbitrary breakpoint may be considered inadequate in this kind of study. In addition, we propose that the adoption of this limiter should be done from the toxicity value found using the same plant derivative.
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Affiliation(s)
- Ariane Chevtchouk Jurno
- Faculdade de Ciências Médicas e da Saúde de Juiz de Fora, SUPREMA, Alameda Salvaterra, 200, Salvaterra, Juiz de Fora, MG, 36033-003, Brazil
| | - Luiza Oliveira Corrêa Netto
- Faculdade de Ciências Médicas e da Saúde de Juiz de Fora, SUPREMA, Alameda Salvaterra, 200, Salvaterra, Juiz de Fora, MG, 36033-003, Brazil
| | - Rafael Silva Duarte
- Laboratório de Micobacterias, Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373 - bloco I - Cidade Universitária, Rio de Janeiro, RJ, 21941-970, Brazil
| | - Rachel Rocha Pinheiro Machado
- Faculdade de Ciências Médicas e da Saúde de Juiz de Fora, SUPREMA, Alameda Salvaterra, 200, Salvaterra, Juiz de Fora, MG, 36033-003, Brazil; Hospital Maternidade Therezinha de Jesus. R. Dr. Dirceu de Andrade, 33 - São Mateus, Juiz de Fora, MG, 36025-140, Brazil.
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19
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Tenneti S, Biswas S, Cox GA, Mans DJ, Lim HJ, RajanBabu TV. Broadly Applicable Stereoselective Syntheses of Serrulatane, Amphilectane Diterpenes, and Their Diastereoisomeric Congeners Using Asymmetric Hydrovinylation for Absolute Stereochemical Control. J Am Chem Soc 2018; 140:9868-9881. [PMID: 30001133 PMCID: PMC6082684 DOI: 10.1021/jacs.8b03549] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A stereogenic center, placed at an exocyclic location next to a chiral carbon in a ring to which it is attached, is a ubiquitous structural motif seen in many bioactive natural products, including di- and triterpenes and steroids. Installation of these centers has been a long-standing problem in organic chemistry. Few classes of compounds illustrate this problem better than serrulatanes and amphilectanes, which carry multiple methyl-bearing exocyclic chiral centers. Nickel-catalyzed asymmetric hydrovinylation (AHV) of vinylarenes and 1,3-dienes such as 1-vinylcycloalkenes provides an exceptionally facile way of introducing these chiral centers. This Article documents our efforts to demonstrate the generality of AHV to access not only the natural products but also their various diastereoisomeric derivatives. Key to success here is the availability of highly tunable phosphoramidite Ni(II) complexes useful for overcoming the inherent selectivity of the chiral intermediates. The yields for hydrovinylation (HV) reactions are excellent, and selectivities are in the range of 92-99% for the desired isomers. Discovery of novel, configurationally fluxional, yet sterically less demanding 2,2'-biphenol-derived phosphoramidite Ni complexes (fully characterized by X-ray) turned out to be critical for success in several HV reactions. We also report a less spectacular yet equally important role of solvents in a metal-ammonia reduction for the installation of a key benzylic chiral center. Starting with simple oxygenated styrene derivatives, we iteratively install the various exocyclic chiral centers present in typical serrulatane [e.g., a (+)- p-benzoquinone natural product, elisabethadione, nor-elisabethadione, helioporin D, a known advanced intermediate for the synthesis of colombiasin and elisapterosin] and amphilectane [e.g., A-F, G-J, and K,L pseudopterosins] derivatives. A concise table showing various synthetic approaches to these molecules is included in the Supporting Information. Our attempts to synthesize a hitherto elusive target, elisabethin A, led to a stereoselective, biomimetic route to pseudopterosin A-F aglycones.
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Affiliation(s)
| | | | | | | | | | - T. V. RajanBabu
- Department of Chemistry and Biochemistry, 100 West 18th Avenue, The Ohio State University, Columbus, Ohio 43210 United States
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20
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Esquivel B, Burgueño-Tapia E, Bustos-Brito C, Pérez-Hernández N, Quijano L, Joseph-Nathan P. Absolute configuration of the diterpenoids icetexone and conacytone from Salvia ballotaeflora. Chirality 2017; 30:177-188. [PMID: 29110401 DOI: 10.1002/chir.22781] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/03/2017] [Accepted: 10/04/2017] [Indexed: 11/10/2022]
Abstract
Detailed literature inspections regarding the diterpenoids icetexone (1) and conacytone (3) reveal that the absolute configuration (AC) of these natural occurring compounds is not rigorously proven, despite they were originally isolated in 1976. This task is now completed by single-crystal X-ray diffraction Flack and Hooft parameters determination after processing data collected with Cu Kα graphite monochromated radiation. The AC of both compounds is further determined by vibrational circular dichroism measurements performed on icetexone acetate (2) and conacytone triacetate (4) since the solubility of 1 and 3 is limited. Comparison of the substituent chemical shifts (SCS) induced by acetylation of 1 and 3 to afford 2 and 4, respectively, reveals that in the case of icetexone, all six SCS values of the quinone ring are in excellent agreement with the expected values, while in the case of conacytone, three agree and three do not agree due to the presence of additional acetates near the quinone ring. Density functional theory calculations performed on 3-hydroxythymoquinone (6) and its tautomer 4-hydroxy-1,2-quinone 7, on 6-hydroxythymoquinone (8) and its tautomer ortho-quinone 9, and on icetexone (1) and the claimed natural occurring ortho-quinone tautomer romulogarzone (5) indicate that 2-hydroxy-1,4-quinones are more stable, by some 11-14 kcal/mol, than their 4-hydroxy-1,2-quinone tautomers, and therefore, romulogarzone (5) is inexistent.
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Affiliation(s)
- Baldomero Esquivel
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, Mexico
| | - Eleuterio Burgueño-Tapia
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Celia Bustos-Brito
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, Mexico
| | - Nury Pérez-Hernández
- Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Leovigildo Quijano
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
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21
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Gao W, McAlpine JB, Choules MP, Napolitano JG, Lankin DC, Simmler C, Ho NA, Lee H, Suh JW, Burton IW, Cho S, Franzblau SG, Chen SN, Pauli GF. Structural Sequencing of Oligopeptides Aided by 1H Iterative Full-Spin Analysis. JOURNAL OF NATURAL PRODUCTS 2017; 80:2630-2643. [PMID: 29035048 DOI: 10.1021/acs.jnatprod.7b00207] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This report describes an approach using 1H NMR iterative full-spin analysis (HiFSA) to extract definitive structural information on unknown peptides from 1D 1H NMR data. By comparing the experimental data and HiFSA fingerprint of a known analogue, it is possible to isolate the characteristic 1H subspectrum of the different amino acids and, thus, elucidate the structure of the peptide. To illustrate this methodology, a comprehensive analysis of five new anti-Mycobacterium tuberculosis peptides (2-6), all analogues of ecumicin (1), was carried out. The method was validated by demonstrating congruence of the HiFSA-based structures with all available data, including MS and 2D NMR. The highly reproducible HiFSA fingerprints of the new ∼1600 amu peptides were generated in this process. Besides oligo-peptides, the HiFSA sequencing approach could be extended to all oligomeric compounds consisting of chains of monomers lacking H-H spin-spin coupling across the moieties. HiFSA sequencing is capable of differentiating complex oligomers that exhibit minor structural differences such as shifted hydoxyl or methyl groups. Because it employs the basic and most sensitive 1D 1H NMR experiment, HiFSA sequencing enables the exploration of peptide analogues up to at least 2000 amu, even with basic contemporary spectrometers and when only sub-milligram amounts of isolates are available.
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Affiliation(s)
- Wei Gao
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - James B McAlpine
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - Mary P Choules
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - José G Napolitano
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Center for Natural Product Technologies, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - David C Lankin
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Center for Natural Product Technologies, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - Charlotte Simmler
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Center for Natural Product Technologies, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - Ngoc Anh Ho
- Center for Nutraceutical and Pharmaceutical Materials, Myongji University , Yongin, Gyeonggi-do 17458, South Korea
| | - Hanki Lee
- Center for Nutraceutical and Pharmaceutical Materials, Myongji University , Yongin, Gyeonggi-do 17458, South Korea
| | - Joo-Won Suh
- Center for Nutraceutical and Pharmaceutical Materials, Myongji University , Yongin, Gyeonggi-do 17458, South Korea
- Division of Biosciences and Bioinformatics, Myongji University , Yongin, Gyeonggi-do 17458, South Korea
| | - Ian W Burton
- Institute for Aquatic and Crop Resource Development, National Research Council , Halifax, Nova Scotia B3H 3Z1, Canada
| | - Sanghyun Cho
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - Scott G Franzblau
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - Shao-Nong Chen
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Center for Natural Product Technologies, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - Guido F Pauli
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Center for Natural Product Technologies, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
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22
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Cao F, Shao CL, Liu YF, Zhu HJ, Wang CY. Cytotoxic Serrulatane-Type Diterpenoids from the Gorgonian Euplexaura sp. and Their Absolute Configurations by Vibrational Circular Dichroism. Sci Rep 2017; 7:12548. [PMID: 28970539 PMCID: PMC5624892 DOI: 10.1038/s41598-017-12841-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 09/14/2017] [Indexed: 11/16/2022] Open
Abstract
Vibrational circular dichroism (VCD) method has become robust and reliable alternative for the stereochemical characterization of natural products. In this paper, three new serrulatane-type diterpenoids, euplexaurenes A-C (1-3), and a known metabolite, anthogorgiene P (4), were obtained from the South China Sea gorgonian Euplexaura sp. GXWZ-05. The absolute configuration of C-11 in 1-4, which was difficult to be determined by common means due to the high conformational flexibility of the eight-carbon aliphatic chain attached at C-4, was determined by VCD method, suggesting a new horizon to define the absolute configurations of natural products possessing chains. Compounds 1-4 were found to show selective cytotoxic activities against human laryngeal carcinoma (Hep-2) cell line with the IC50 values of 1.95, 7.80, 13.6 and 5.85 μM, respectively.
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Affiliation(s)
- Fei Cao
- School of Medicine and Pharmacy, Ocean University of China; Key Laboratory of Marine Drugs, The Ministry of Education of China, Qingdao, 266003, China
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Hebei University, Baoding, 071002, China
| | - Chang-Lun Shao
- School of Medicine and Pharmacy, Ocean University of China; Key Laboratory of Marine Drugs, The Ministry of Education of China, Qingdao, 266003, China.
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
| | - Yun-Feng Liu
- School of Medicine and Pharmacy, Ocean University of China; Key Laboratory of Marine Drugs, The Ministry of Education of China, Qingdao, 266003, China
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Hebei University, Baoding, 071002, China
| | - Hua-Jie Zhu
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Hebei University, Baoding, 071002, China
| | - Chang-Yun Wang
- School of Medicine and Pharmacy, Ocean University of China; Key Laboratory of Marine Drugs, The Ministry of Education of China, Qingdao, 266003, China.
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
- Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, 266003, China.
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23
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Julio LF, Burgueño-Tapia E, Díaz CE, Pérez-Hernández N, González-Coloma A, Joseph-Nathan P. Absolute configuration of the ocimene monoterpenoids from Artemisia absinthium. Chirality 2017; 29:716-725. [PMID: 28840973 DOI: 10.1002/chir.22741] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/06/2017] [Accepted: 07/09/2017] [Indexed: 12/13/2022]
Abstract
The absolute configuration (AC) of the naturally occurring ocimenes (-)-(3S,5Z)-2,6-dimethyl-2,3-epoxyocta-5,7-diene (1) and (-)-(3S,5Z)-2,6-dimethylocta-5,7-dien-2,3-diol (2), isolated from the essential oils of domesticated specimens of Artemisia absinthium, followed by vibrational circular dichroism (VCD) studies of 1, as well as from the acetonide 3 and the monoacetate 4, both derived from 2, since secondary alcohols are not the best functional groups to be present during VCD studies in solution due to intermolecular associations. The AC follows from comparison of experimental and calculated VCD spectra that were obtained by Density Functional Theory computation at the B3LYP/DGDZVP level of theory. Careful nuclear magnetic resonance (NMR) measurements were compared with literature values, providing for the first time systematic 1 H and 13 C chemical shift data. Regarding homonuclear 1 H coupling constants, after performing a few irradiation experiments that showed the presence of several small long-range interactions, the complete set of coupling constants for 3, which is representative of the four studied molecules, was determined by iterations using the PERCH software. This procedure even allowed assigning the pro-R and pro-S methyl group signals of the two gem-dimethyl groups present in 3.
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Affiliation(s)
- Luis F Julio
- Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Eleuterio Burgueño-Tapia
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Carmen E Díaz
- Instituto de Productos Naturales y Agrobiología, Consejo Superior de Investigaciones Científicas, La Laguna, Tenerife, Spain
| | - Nury Pérez-Hernández
- Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Azucena González-Coloma
- Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
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24
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Sharma A, Flores-Vallejo RDC, Cardoso-Taketa A, Villarreal ML. Antibacterial activities of medicinal plants used in Mexican traditional medicine. JOURNAL OF ETHNOPHARMACOLOGY 2017; 208:264-329. [PMID: 27155134 DOI: 10.1016/j.jep.2016.04.045] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Revised: 04/24/2016] [Accepted: 04/25/2016] [Indexed: 05/17/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE We provide an extensive summary of the in vitro antibacterial properties of medicinal plants popularly used in Mexico to treat infections, and we discuss the ethnomedical information that has been published for these species. MATERIALS AND METHODS We carried out a bibliographic investigation by analyzing local and international peer-reviewed papers selected by consulting internationally accepted scientific databases from 1995 to 2014. We provide specific information about the evaluated plant parts, the type of extracts, the tested bacterial strains, and the inhibitory concentrations for each one of the species. We recorded the ethnomedical information for the active species, as well as their popular names and local distribution. Information about the plant compounds that has been identified is included in the manuscript. This review also incorporates an extensive summary of the available toxicological reports on the recorded species, as well as the worldwide registries of plant patents used for treating bacterial infections. In addition, we provide a list with the top plant species with antibacterial activities in this review RESULTS: We documented the in vitro antibacterial activities of 343 plant species pertaining to 92 botanical families against 72 bacterial species, focusing particularly on Staphylococcus aureus, Mycobacterium tuberculosis, Escherichia coli and Pseudomonas aeruginosa. The plant families Asteraceae, Fabaceae, Lamiaceae and Euphorbiaceae included the largest number of active species. Information related to popular uses reveals that the majority of the plants, in addition to treating infections, are used to treat other conditions. The distribution of Mexican plants extended from those that were reported to grow in just one state to those that grow in all 32 Mexican states. From 75 plant species, 225 compounds were identified. Out of the total plant species, only 140 (40.57%) had at least one report about their toxic effects. From 1994 to July 2014 a total of 11,836 worldwide antibacterial patents prepared from different sources were recorded; only 36 antibacterial patents from plants were registered over the same time period. We offered some insights on the most important findings regarding the antibacterial effects, current state of the art, and research perspectives of top plant species with antibacterial activities in vitro. CONCLUSIONS Studies of the antibacterial in vitro activity of medicinal plants popularly used in Mexico to treat infections indicate that both the selection of plant material and the investigation methodologies vary. Standardized experimental procedures as well as in vivo pharmacokinetic studies to document the effectiveness of plant extracts and compounds are necessary. This review presents extensive information about the medicinal plants possessing antibacterial activity that has been scientifically studied and are popularly used in Mexico. We anticipate that this review will be of use for future studies because it constitutes a valuable information tool for selecting the most significant plants and their potential antibacterial properties.
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Affiliation(s)
- Ashutosh Sharma
- Escuela de Ingeniería en Alimentos, Biotecnología y Agronomía (ESIABA), Tecnológico de Monterrey, Campus Querétaro, México
| | - Rosario Del Carmen Flores-Vallejo
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Col. Chamilpa, Cuernavaca Morelos 62209, México
| | - Alexandre Cardoso-Taketa
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Col. Chamilpa, Cuernavaca Morelos 62209, México
| | - María Luisa Villarreal
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Col. Chamilpa, Cuernavaca Morelos 62209, México
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25
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Structure Elucidation and Botanical Characterization of Diterpenes from a Specific Type of Bee Glue. Molecules 2017; 22:molecules22071185. [PMID: 28708125 PMCID: PMC6152305 DOI: 10.3390/molecules22071185] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 07/12/2017] [Accepted: 07/12/2017] [Indexed: 01/26/2023] Open
Abstract
Investigation of the single plant source bee glue type originating from Southern Australia resulted in the isolation and structure elucidation of major serrulatane diterpenes, novel 7,8,18-trihydroxyserrulat-14-ene (1), along with its oxidized product, 5,18-epoxyserrulat-14-en-7,8-dione (3) and known (18RS)-5,18-epoxyserrulat-14-en-8,18-diol (2). Exploration into the botanical origin revealed Myoporum insulare R. Br, as the plant source of the bee glue materials. This discovery was made through comparative analysis of the myoporum bee glue samples collected from the beehives, analyses of plant resinous exudate, and resin carried on the hind legs of bees foraging for bee glue.
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26
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Ortega AR, Ortiz-Pastrana N, Quijano L, Becerra-Martínez E, Olmedo-Aguirre JO, Joseph-Nathan P. Structure and absolute configuration of hydroxy-bis-dihydrofarinosin from Encelia farinosa. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:530-539. [PMID: 27859567 DOI: 10.1002/mrc.4554] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 11/11/2016] [Accepted: 11/15/2016] [Indexed: 06/06/2023]
Abstract
The structure of the dimeric eudesmanolide hydroxy-bis-dihydrofarinosin (1) from Encelia farinosa followed after contrasting their 1 H and 13 C NMR spectra with those of encelin (6), hydroxy-bis-dihydroencelin (3), and farinosin (4). Structure 1 was verified by single-crystal X-ray diffraction analysis, which further provided the stereochemistry of the hydroxy group at C-4. Comparison of the experimental vibrational circular dichroism spectrum of its derived diacetate 2 with that calculated by density functional theory provided the absolute configuration, which resulted the same as that of its biogenetic precursor 4. Evaluation of several chemical shift differences between the two eudesmanolide fragments of 1 and 3 allows also ascertaining the yet not reported absolute configuration of the C-4 stereogenic center of 3. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Alfredo R Ortega
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Mexico City, 04510, Mexico
| | - Naytzé Ortiz-Pastrana
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Mexico City, 04510, Mexico
| | - Leovigildo Quijano
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Mexico City, 04510, Mexico
| | - Elvia Becerra-Martínez
- Centro de Nanociencias y Micro y Nanotecnologías, Instituto Politécnico Nacional, Mexico City, 07738, Mexico
| | - José O Olmedo-Aguirre
- Departamento de Ingeniería Eléctrica, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México City, 07000, Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México City, 07000, Mexico
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27
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Martínez-Rivas CJ, Álvarez-Román R, Rivas-Morales C, Elaissari A, Fessi H, Galindo-Rodríguez SA. Quantitative Aspect of Leucophyllum frutescens Fraction before and after Encapsulation in Polymeric Nanoparticles. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2017; 2017:9086467. [PMID: 29348967 PMCID: PMC5734004 DOI: 10.1155/2017/9086467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 09/11/2017] [Accepted: 09/13/2017] [Indexed: 05/22/2023]
Abstract
The interest on plants has been focalized due to their biological activities. Extracts or fractions from plants in biodegradable polymeric nanoparticles (NP) provide many advantages on application studies. The encapsulation of the extract or fraction in NP is determined for the establishment of the test dose. HPLC method is an alternative to calculate this parameter. An analytical method based on HPLC for quantification of a hexane fraction from L. frutescens was developed and validated according to ICH. Different concentrations of the hexane fraction from leaves (HFL) were prepared (100-600 μg/mL). Linearity, limit of detection, limit of quantification, and intra- and interday precision parameters were determined. HFL was encapsulated by nanoprecipitation technique and analyzed by HPLC for quantitative aspect. The method was linear and precise for the quantification of the HFL components. NP size was 190 nm with homogeneous size distribution. Through validation method, it was determined that the encapsulation of components (1), (2), (3), and (4) was 44, 74, 86, and 97%, respectively. A simple, repeatable, and reproducible methodology was developed for the propose of quantifying the components of a vegetable material loaded in NP, using as a model the hexane fraction of L. frutescens leaves.
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Affiliation(s)
- Claudia Janeth Martínez-Rivas
- Facultad de Ciencias Biológicas, Laboratorio de Nanotecnología, Universidad Autónoma de Nuevo León, Av. Pedro de Alba s/n, 66455 San Nicolás de los Garza, NL, Mexico
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, LAGEP-UMR 5007, 69622 Lyon, France
| | - Rocío Álvarez-Román
- Facultad de Medicina, Departamento de Química Analítica, Universidad Autónoma de Nuevo León, Av. Fco. I. Madero y Dr. E. Aguirre Pequeño s/n, 64460 Monterrey, NL, Mexico
| | - Catalina Rivas-Morales
- Facultad de Ciencias Biológicas, Laboratorio de Nanotecnología, Universidad Autónoma de Nuevo León, Av. Pedro de Alba s/n, 66455 San Nicolás de los Garza, NL, Mexico
| | - Abdelhamid Elaissari
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, LAGEP-UMR 5007, 69622 Lyon, France
| | - Hatem Fessi
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, LAGEP-UMR 5007, 69622 Lyon, France
| | - Sergio Arturo Galindo-Rodríguez
- Facultad de Ciencias Biológicas, Laboratorio de Nanotecnología, Universidad Autónoma de Nuevo León, Av. Pedro de Alba s/n, 66455 San Nicolás de los Garza, NL, Mexico
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28
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Barros de Alencar MVO, de Castro E Sousa JM, Rolim HML, de Medeiros MDGF, Cerqueira GS, de Castro Almeida FR, Citó AMDGL, Ferreira PMP, Lopes JAD, de Carvalho Melo-Cavalcante AA, Islam MT. Diterpenes as lead molecules against neglected tropical diseases. Phytother Res 2016; 31:175-201. [PMID: 27896890 DOI: 10.1002/ptr.5749] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 10/29/2016] [Accepted: 10/31/2016] [Indexed: 01/19/2023]
Abstract
Nowadays, neglected tropical diseases (NTDs) are reported to be present everywhere. Poor and developing areas in the world have received great attention to NTDs. Drug resistance, safety profile, and various challenges stimulate the search for alternative medications. Plant-based drugs are viewed with great interest, as they are believed to be devoid of side effects. Diterpenes, a family of essential oils, have showed attractive biological effects. A systematic review of the literature was carried out to summarize available evidences of diterpenes against NTDs. For this, databases were searched using specific search terms. Among the 2338 collected reports, a total of 181 articles were included in this review. Of them, 148 dealt with investigations using single organisms, and 33 used multiple organisms. No mechanisms of action were reported in the case of 164 reports. A total of 93.92% were related to nonclinical studies, and 4.42% and 1.66% dealt with preclinical and clinical studies, respectively. The review displays that many diterpenes are effective upon Chagas disease, chikungunya, echinococcosis, dengue, leishmaniasis, leprosy, lymphatic filariasis, malaria, schistosomiasis, and tuberculosis. Indeed, diterpenes are amazing drug candidates against NTDs. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
| | - João Marcelo de Castro E Sousa
- Department of Biological Sciences, Federal University of Piauí, Picos, (Piauí), 64.607-670, Brazil
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
| | - Hercília Maria Lins Rolim
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
- Department of Pharmacy, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
| | - Maria das Graças Freire de Medeiros
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
- Department of Pharmacy, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
| | - Gilberto Santos Cerqueira
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
- Postgraduate Program in Biotechnology, Biotechnology and Biodiversity Center for Research (BIOTEC), Federal University of Piauí (LAFFEX), Parnaíba, Piauí, 64.218-470, Brazil
| | - Fernanda Regina de Castro Almeida
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
- Department of Biochemistry and Pharmacology, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
| | - Antônia Maria das Graças Lopes Citó
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
- Department of Chemistry, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
| | - Paulo Michel Pinheiro Ferreira
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
- Department of Biophysics and Physiology, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
| | | | - Ana Amélia de Carvalho Melo-Cavalcante
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
| | - Md Torequl Islam
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, Piauí, 64.049-550, Brazil
- Department of Pharmacy, Southern University Bangladesh, Mehedibag, Chittagong, 4000, Bangladesh
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29
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Incerti-Pradillos CA, Kabeshov MA, O'Hora PS, Shipilovskikh SA, Rubtsov AE, Drobkova VA, Balandina SY, Malkov AV. Asymmetric Total Synthesis of (−)-Erogorgiaene and Its C-11 Epimer and Investigation of Their Antimycobacterial Activity. Chemistry 2016; 22:14390-6. [DOI: 10.1002/chem.201602440] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Paul S. O'Hora
- Department of Chemistry; Loughborough University; Loughborough LE11 3TU UK
| | - Sergei A. Shipilovskikh
- Department of Chemistry; Loughborough University; Loughborough LE11 3TU UK
- Department of Chemistry; Perm State University; Bukireva 15 614990 Perm Russia
| | | | - Vera A. Drobkova
- Department of Chemistry; Perm State University; Bukireva 15 614990 Perm Russia
| | | | - Andrei V. Malkov
- Department of Chemistry; Loughborough University; Loughborough LE11 3TU UK
- Chemistry Department; Peoples' Friendship University of Russia; Miklukho-Maklaya 6 117198 Moscow Russia
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30
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Yu X, Su F, Liu C, Yuan H, Zhao S, Zhou Z, Quan T, Luo T. Enantioselective Total Syntheses of Various Amphilectane and Serrulatane Diterpenoids via Cope Rearrangements. J Am Chem Soc 2016; 138:6261-70. [DOI: 10.1021/jacs.6b02624] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xuerong Yu
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Fan Su
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Chang Liu
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Haosen Yuan
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Shan Zhao
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhiyao Zhou
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Tianfei Quan
- Peking-Tsinghua
Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Tuoping Luo
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Peking-Tsinghua
Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
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31
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Ortega AR, Sánchez-Castellanos M, Pérez-Hernández N, Robles-Zepeda RE, Joseph-Nathan P, Quijano L. Relative Stereochemistry and Absolute Configuration of Farinosin, a Eudesmanolide FromEncelia farinosa. Chirality 2016; 28:415-9. [DOI: 10.1002/chir.22595] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/09/2016] [Accepted: 02/12/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Alfredo R. Ortega
- Instituto de Química; Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; Mexico City Mexico
| | - Mariano Sánchez-Castellanos
- Instituto de Química; Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; Mexico City Mexico
| | - Nury Pérez-Hernández
- Escuela Nacional de Medicina y Homeopatía; Instituto Politécnico Nacional; Mexico City Mexico
| | - Ramón E. Robles-Zepeda
- Departamento de Ciencias Químico Biológicas; Universidad de Sonora; Hermosillo Sonora Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional; Mexico City Mexico
| | - Leovigildo Quijano
- Instituto de Química; Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; Mexico City Mexico
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32
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Pauli GF, Niemitz M, Bisson J, Lodewyk MW, Soldi C, Shaw JT, Tantillo DJ, Saya JM, Vos K, Kleinnijenhuis RA, Hiemstra H, Chen SN, McAlpine JB, Lankin DC, Friesen JB. Toward Structural Correctness: Aquatolide and the Importance of 1D Proton NMR FID Archiving. J Org Chem 2016; 81:878-89. [PMID: 26812443 PMCID: PMC4746703 DOI: 10.1021/acs.joc.5b02456] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The revision of the structure of
the sesquiterpene aquatolide from
a bicyclo[2.2.0]hexane to a bicyclo[2.1.1]hexane structure using compelling
NMR data, X-ray crystallography, and the recent confirmation via full
synthesis exemplify that the achievement of “structural correctness”
depends on the completeness of the experimental evidence. Archived
FIDs and newly acquired aquatolide spectra demonstrate that archiving
and rigorous interpretation of 1D 1H NMR data may enhance
the reproducibility of (bio)chemical research and curb the growing
trend of structural misassignments. Despite being the most accessible
NMR experiment, 1D 1H spectra encode a wealth of information
about bonds and molecular geometry that may be fully mined by 1H iterative full spin analysis (HiFSA). Fully characterized
1D 1H spectra are unideterminant for a given structure.
The corresponding FIDs may be readily submitted with publications
and collected in databases. Proton NMR spectra are indispensable for
structural characterization even in conjunction with 2D data. Quantum
interaction and linkage tables (QuILTs) are introduced for a more
intuitive visualization of 1D J-coupling relationships,
NOESY correlations, and heteronuclear experiments. Overall, this study
represents a significant contribution to best practices in NMR-based
structural analysis and dereplication.
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Affiliation(s)
- Guido F Pauli
- Department of Medicinal Chemistry & Pharmacognosy and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , 833 South Wood Street, Chicago, Illinois 60612, United States
| | - Matthias Niemitz
- PERCH Solutions Limited , Puijonkatu 24B5, 70110 Kuopio, Finland
| | - Jonathan Bisson
- Department of Medicinal Chemistry & Pharmacognosy and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , 833 South Wood Street, Chicago, Illinois 60612, United States
| | - Michael W Lodewyk
- Physical Science Department, Butte College , Oroville, California 95965, United States
| | - Cristian Soldi
- Department of Chemistry, University of California-Davis , One Shields Avenue, Davis, California 95616, United States.,Federal University of Santa Catarina , Centro de Curitibanos, Rod. Ulysses Gaboardi, Km 3, Curitibanos, SC 89520-000, Brazil
| | - Jared T Shaw
- Department of Chemistry, University of California-Davis , One Shields Avenue, Davis, California 95616, United States
| | - Dean J Tantillo
- Department of Chemistry, University of California-Davis , One Shields Avenue, Davis, California 95616, United States
| | - Jordy M Saya
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Klaas Vos
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Roel A Kleinnijenhuis
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Henk Hiemstra
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Shao-Nong Chen
- Department of Medicinal Chemistry & Pharmacognosy and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , 833 South Wood Street, Chicago, Illinois 60612, United States
| | - James B McAlpine
- Department of Medicinal Chemistry & Pharmacognosy and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , 833 South Wood Street, Chicago, Illinois 60612, United States
| | - David C Lankin
- Department of Medicinal Chemistry & Pharmacognosy and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago , 833 South Wood Street, Chicago, Illinois 60612, United States
| | - J Brent Friesen
- Physical Sciences Department, Rosary College of Arts and Sciences, Dominican University , 7900 West Division Street, River Forest, Illinois 60305, United States
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33
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Becerra-Martinez E, Ramírez-Gualito KE, Pérez-Hernández N, Joseph-Nathan P. Total (1)H NMR assignment of 3β-acetoxypregna-5,16-dien-20-one. Steroids 2015; 104:208-13. [PMID: 26476187 DOI: 10.1016/j.steroids.2015.10.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 09/17/2015] [Accepted: 10/09/2015] [Indexed: 11/15/2022]
Abstract
This work describes the total and unambiguous assignment of the 750 MHz (1)H NMR spectrum of 3β-acetoxypregna-5,16-dien-20-one or 16-DPA (1), the well-known intermediate utilized in the synthesis of biological important commercial steroids. The task was accomplished by extracting the coupling constant values in the overlapped spectrum region by HSQC, and using these values in the (1)H iterative full spin analysis integrated in the PERCH NMR software. Comparison of the experimental vicinal coupling constants of 1 with the values calculated using Altona provides an excellent correlation. The same procedure, when applied to the published data of progesterone (2) and testosterone (3), afforded an acceptable correlation for 2 and a poor correlation for 3. In the last case, this suggested the reassignment of all four vicinal coupling constants for the methylene signals at the C-15 and C-16 positions, demonstrating the utility of this methodology.
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Affiliation(s)
- Elvia Becerra-Martinez
- Centro de Nanociencias y Micro y Nanotecnologías, Instituto Politécnico Nacional, México, D.F. 07738, Mexico
| | - Karla E Ramírez-Gualito
- Centro de Nanociencias y Micro y Nanotecnologías, Instituto Politécnico Nacional, México, D.F. 07738, Mexico
| | - Nury Pérez-Hernández
- Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, México, D.F. 07320, Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D.F. 07000, Mexico.
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Escarcena R, Perez-Meseguer J, del Olmo E, Alanis-Garza B, Garza-González E, Salazar-Aranda R, de Torres NW. Diterpenes Synthesized from the Natural Serrulatane Leubethanol and Their in Vitro Activities against Mycobacterium tuberculosis. Molecules 2015; 20:7245-62. [PMID: 25905603 PMCID: PMC6272751 DOI: 10.3390/molecules20047245] [Citation(s) in RCA: 10] [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: 02/02/2015] [Revised: 03/30/2015] [Accepted: 04/13/2015] [Indexed: 11/16/2022] Open
Abstract
Seventeen new derivatives of the natural diterpene leubethanol, including some potential pro-drugs, with changes in the functionality of the aliphatic chain or modifications of aromatic ring and the phenolic group, were synthesized and tested in vitro by the MABA technique for their activity against the H37Rv strain of Mycobacterium tuberculosis. Some compounds showed antimycobacterial selectivity indices higher than leubethanol.
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Affiliation(s)
- Ricardo Escarcena
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, CIETUS, IBSAL, Universidad de Salamanca, 37007-Salamanca, Spain; E-Mail:
| | - Jonathan Perez-Meseguer
- Department of Analytical Chemistry, Faculty of Medicine, Universidad Autónoma de Nuevo Leon, PO Box 2316, Sucursal Tecnológico, Monterrey, NL 64841, Mexico; E-Mails: (J.P.-M.); (B.A.-G.); (R.S.-A.); (N.W.T.)
| | - Esther del Olmo
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, CIETUS, IBSAL, Universidad de Salamanca, 37007-Salamanca, Spain; E-Mail:
| | - Blanca Alanis-Garza
- Department of Analytical Chemistry, Faculty of Medicine, Universidad Autónoma de Nuevo Leon, PO Box 2316, Sucursal Tecnológico, Monterrey, NL 64841, Mexico; E-Mails: (J.P.-M.); (B.A.-G.); (R.S.-A.); (N.W.T.)
| | - Elvira Garza-González
- Servicio de Gastroenterología y Departamento de Patología Clínica, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo Leon, Av. Madero y Gonzalitos S/N, Mitras Centro, Monterrey, NL 64220, Mexico; E-Mail:
| | - Ricardo Salazar-Aranda
- Department of Analytical Chemistry, Faculty of Medicine, Universidad Autónoma de Nuevo Leon, PO Box 2316, Sucursal Tecnológico, Monterrey, NL 64841, Mexico; E-Mails: (J.P.-M.); (B.A.-G.); (R.S.-A.); (N.W.T.)
| | - Noemí Waksman de Torres
- Department of Analytical Chemistry, Faculty of Medicine, Universidad Autónoma de Nuevo Leon, PO Box 2316, Sucursal Tecnológico, Monterrey, NL 64841, Mexico; E-Mails: (J.P.-M.); (B.A.-G.); (R.S.-A.); (N.W.T.)
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Cerda-García-Rojas CM, Bucio MA, González SB, García-Gutiérrez HA, Joseph-Nathan P. Absolute configuration of esquelane derivatives from Adesmia boronioides by vibrational circular dichroism. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2014.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Sánchez-Castellanos M, Bucio MA, Hernández-Barragán A, Joseph-Nathan P, Cuevas G, Quijano L. Vibrational Circular Dichroism (VCD), VCD Exciton Coupling, and X-ray Determination of the Absolute Configuration of an α
,β
-Unsaturated Germacranolide. Chirality 2015; 27:247-52. [DOI: 10.1002/chir.22420] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 12/04/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Mariano Sánchez-Castellanos
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior, Ciudad Universitaria 04510 México D.F. Mexico
| | - María A. Bucio
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional; Apartado 14-740 México D.F., 07000 Mexico
| | - Angelina Hernández-Barragán
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional; Apartado 14-740 México D.F., 07000 Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional; Apartado 14-740 México D.F., 07000 Mexico
| | - Gabriel Cuevas
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior, Ciudad Universitaria 04510 México D.F. Mexico
| | - Leovigildo Quijano
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior, Ciudad Universitaria 04510 México D.F. Mexico
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Batista Jr. JM, Blanch EW, Bolzani VDS. Recent advances in the use of vibrational chiroptical spectroscopic methods for stereochemical characterization of natural products. Nat Prod Rep 2015; 32:1280-302. [DOI: 10.1039/c5np00027k] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A comprehensive look into application of vibrational optical activity methods for conformational and configurational assignments in natural product molecules over the last 15 years is provided.
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Affiliation(s)
- João M. Batista Jr.
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Carlos
- Brazil
| | - Ewan W. Blanch
- School of Applied Sciences
- RMIT University
- Melbourne
- Australia
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38
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Reynolds WF, Mazzola EP. Nuclear magnetic resonance in the structural elucidation of natural products. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2015; 100:223-309. [PMID: 25632562 DOI: 10.1007/978-3-319-05275-5_3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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39
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Cordero-Pérez JJ, de Ita-Gutiérrez SL, Trejo-Carbajal N, Meléndez-Rodríguez M, Sánchez-Zavala M, Pérez-Hernández N, Morales-Ríos MS, Joseph-Nathan P, Suárez-Castillo OR. Complete 1H NMR assignment of 3-formylindole derivatives. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:789-794. [PMID: 25228011 DOI: 10.1002/mrc.4126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 07/22/2014] [Accepted: 07/23/2014] [Indexed: 06/03/2023]
Affiliation(s)
- José J Cordero-Pérez
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184, Mexico
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40
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Alvarez-Cisneros C, Muñoz MA, Suárez-Castillo OR, Pérez-Hernández N, Cerda-García-Rojas CM, Morales-Ríos MS, Joseph-Nathan P. Stereospecific (5) JHortho,OMe couplings in methoxyindoles, methoxycoumarins, and methoxyflavones. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:491-499. [PMID: 25042582 DOI: 10.1002/mrc.4103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 06/06/2014] [Accepted: 06/09/2014] [Indexed: 06/03/2023]
Abstract
Long-range coupling constants (5) JHortho,OMe were measured in series of methoxyindoles, methoxycoumarins, and methoxyflavones by the modified J doubling in the frequency domain method. The COSY and NOESY spectra revealed the coupling of the -OMe group with a specific proton at the ortho position and its preferred conformation. Homonuclear (1) H-(1) H couplings were confirmed by irradiation of the -OMe signal. Density functional theory calculations of (5) JHortho,OMe using the modified aug-cc-pVTZ basis set evidenced that the Fermi contact term shows good agreement with the experimental J values. Accurate chemical shift and coupling constant values followed after iterative quantum mechanical spectral analysis using the PERCH software.
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Affiliation(s)
- Celina Alvarez-Cisneros
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
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41
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Villanueva-Cañongo C, Pérez-Hernández N, Hernández-Carlos B, Cedillo-Portugal E, Joseph-Nathan P, Burgueño-Tapia E. Complete 1H NMR assignments of pyrrolizidine alkaloids and a new eudesmanoid from Senecio polypodioides. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:251-257. [PMID: 24574143 DOI: 10.1002/mrc.4054] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 01/28/2014] [Accepted: 02/01/2014] [Indexed: 06/03/2023]
Abstract
Chemical investigation of the aerial parts of Senecio polypodioides lead to the isolation of the new eudesmanoid 1β-angeloyloxyeudesm-7-ene-4β,9α-diol (1) and the known dirhamnosyl flavonoid lespidin (3), while from roots, the known 7β-angeloyloxy-1-methylene-8α-pyrrolizidine (5) and sarracine N-oxide (6), as well as the new neosarracine N-oxide (8), were obtained. The structure of 1 and 8 was elucidated by spectral means. Complete assignments of the (1)H NMR data for 5, 6, sarracine (7), and 8 were made using one-dimensional and two-dimensional NMR experiments and by application of the iterative full spin analysis of the PERCH NMR software.
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Affiliation(s)
- Claudia Villanueva-Cañongo
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala, Col. Santo Tomás, México, 11340, Mexico
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42
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García-Sánchez E, Ramírez-López CB, Talavera-Alemán A, León-Hernández A, Martínez-Muñoz RE, Martínez-Pacheco MM, Gómez-Hurtado MA, Cerda-García-Rojas CM, Joseph-Nathan P, del Río RE. Absolute configuration of (13R)- and (13S)-labdane diterpenes coexisting in Ageratina jocotepecana. JOURNAL OF NATURAL PRODUCTS 2014; 77:1005-1012. [PMID: 24702233 DOI: 10.1021/np500022w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Chemical investigation of the hexanes extracts of Ageratina jocotepecana afforded (-)-(5S,9S,10S,13S)-labd-7-en-15-oic acid (1), methyl (-)-(5S,9S,10S,13S)-labd-7-en-15-oate (2), (+)-(5S,8R,9R,10S,13R)-8-hydroxylabdan-15-oic acid (3), and (-)-(5S,9S,10S,13Z)-labda-7,13-dien-15-oic acid (5). The coexistence of (13R)- and (13S)-labdanes in this member of the Asteraceae family was demonstrated by vibration circular dichroism measurements of ester 2 and methyl (+)-(5S,8R,9R,10S,13R)-8-hydroxylabdan-15-oate (4) in comparison to the DFT B3LYP/DGDZVP-calculated spectra. In addition, transformation of 1 and 3 with HClO4 in MeOH yielded epimeric methyl (+)-(5S,10S,13S)-labd-8-en-15-oate (6) and methyl (+)-(5S,10S,13R)-labd-8-en-15-oate (7), respectively, confirming the presence of C-13 epimers in this plant. Diterpene 1 showed remarkable antibacterial activity against Bacillus subtilis (MIC 0.15 mg/mL) and Staphylococcus aureus (MIC 0.78 mg/mL), while diterpene 3 exhibited moderate activities against the same organisms.
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Affiliation(s)
- Edgar García-Sánchez
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo , Ciudad Universitaria, Morelia, Michoacán 58030, Mexico
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43
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Sherer EC, Lee CH, Shpungin J, Cuff JF, Da C, Ball R, Bach R, Crespo A, Gong X, Welch CJ. Systematic approach to conformational sampling for assigning absolute configuration using vibrational circular dichroism. J Med Chem 2014; 57:477-94. [PMID: 24383452 DOI: 10.1021/jm401600u] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Systematic methods that speed-up the assignment of absolute configuration using vibrational circular dichrosim (VCD) and simplify its usage will advance this technique into a robust platform technology. Applying VCD to pharmaceutically relevant compounds has been handled in an ad hoc fashion, relying on fragment analysis and technical shortcuts to reduce the computational time required. We leverage a large computational infrastructure to provide adequate conformational exploration which enables an accurate assignment of absolute configuration. We describe a systematic approach for rapid calculation of VCD/IR spectra and comparison with corresponding measured spectra and apply this approach to assign the correct stereochemistry of nine test cases. We suggest moving away from the fragment approach when making VCD assignments. In addition to enabling faster and more reliable VCD assignments of absolute configuration, the ability to rapidly explore conformational space and sample conformations of complex molecules will have applicability in other areas of drug discovery.
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Affiliation(s)
- Edward C Sherer
- Merck Research Laboratories, Merck & Co., Inc., PO Box 2000, Rahway, New Jersey 07065, United States
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44
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Batista JM, da Silva Bolzani V. Determination of the Absolute Configuration of Natural Product Molecules Using Vibrational Circular Dichroism. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2014. [DOI: 10.1016/b978-0-444-63294-4.00013-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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45
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Hwang CH, Jaki BU, Klein LL, Lankin DC, McAlpine JB, Napolitano JG, Fryling NA, Franzblau SG, Cho SH, Stamets PE, Wang Y, Pauli GF. Chlorinated coumarins from the polypore mushroom Fomitopsis officinalis and their activity against Mycobacterium tuberculosis. JOURNAL OF NATURAL PRODUCTS 2013; 76:1916-1922. [PMID: 24087924 PMCID: PMC3851412 DOI: 10.1021/np400497f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
An EtOH extract of the polypore mushroom Fomitopsis officinalis afforded two new naturally occurring chlorinated coumarins, which were identified as the previously synthesized compounds 6-chloro-4-phenyl-2H-chromen-2-one (1) and ethyl 6-chloro-2-oxo-4-phenyl-2H-chromen-3-carboxylate (2). The structures of the two isolates were deduced by ab initio spectroscopic methods and confirmed by chemical synthesis. In addition, an analogue of each was synthesized as 7-chloro-4-phenyl-2H-chromen-2-one (3) and ethyl 7-chloro-2-oxo-4-phenyl-2H-chromen-3-carboxylate (4). All four compounds were characterized physicochemically, and their antimicrobial activity profiles revealed a narrow spectrum of activity with lowest MICs against the Mycobacterium tuberculosis complex.
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Affiliation(s)
- Chang Hwa Hwang
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
| | - Birgit U. Jaki
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
| | - Larry L. Klein
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
| | - David C. Lankin
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
| | - James B. McAlpine
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
| | - José G. Napolitano
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
| | | | - Scott G. Franzblau
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
| | - Sang Hyun Cho
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
| | | | - Yuehong Wang
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
| | - Guido F. Pauli
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, U.S.A
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46
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Lu JM, Perkins MV, Griesser HJ. Total synthesis and structural confirmation of the antibacterial diterpene leubethanol. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.05.082] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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47
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Zepeda LG, Burgueño-Tapia E, Pérez-Hernández N, Cuevas G, Joseph-Nathan P. NMR-based conformational analysis of perezone and analogues. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2013; 51:245-250. [PMID: 23436543 DOI: 10.1002/mrc.3940] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 01/16/2013] [Accepted: 01/17/2013] [Indexed: 06/01/2023]
Abstract
Complete assignment of the (1)H NMR chemical shift and coupling constant values of perezone (1), O-methylperezone (2) and 6-hydroxyperezone (3) was carried out by total-line-shape-fitting calculations using the PERCH iterative spectra analysis software (PERCH Solutions Ltd., Kuopio, Finland). The resulting simulated spectra for the three compounds showed strong similarity to their corresponding experimental spectra. Particularly, all vicinal, allylic and homoallylic coupling constant values for the side chain of the three compounds were very similar, thus revealing that the conformation of these three molecules in solution is indeed almost identical. This fact is in agreement with extended side chain conformations over folded chain conformations because 1, 2 and 3 undergo completely different intramolecular cycloaddition reactions. In addition, results of double pulsed field gradient spin echo NOESY 1D experiments performed on perezone (1) were unable to provide evidence for folded conformers.
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Affiliation(s)
- L Gerardo Zepeda
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala, Col. Santo Tomás, México, D.F., 11340, Mexico
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48
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Evaluation of pseudopteroxazole and pseudopterosin derivatives against Mycobacterium tuberculosis and other pathogens. Mar Drugs 2012; 10:1711-1728. [PMID: 23015770 PMCID: PMC3447335 DOI: 10.3390/md10081711] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 07/25/2012] [Accepted: 08/01/2012] [Indexed: 01/10/2023] Open
Abstract
Pseudopterosins and pseudopteroxazole are intriguing marine natural products that possess notable antimicrobial activity with a commensurate lack of cytotoxicity. New semi-synthetic pseudopteroxazoles, pseudopteroquinoxalines and pseudopterosin congeners along with simple synthetic mimics of the terpene skeleton were synthesized. In order to build structure-activity relationships, a set of 29 new and previously reported compounds was assessed for invitro antimicrobial and cytotoxic activities. A number of congeners exhibited antimicrobial activity against a range of Gram-positive bacteria including Mycobacteriumtuberculosis H37Rv, with four displaying notable antitubercular activity against both replicating and non-replicating persistent forms of M.tuberculosis. One new semi-synthetic compound, 21-((1H-imidazol-5-yl)methyl)-pseudopteroxazole (7a), was more potent than the natural products pseudopterosin and pseudopteroxazole and exhibited equipotent activity against both replicating and non-replicating persistent forms of M.tuberculosis with a near absence of invitro cytotoxicity. Pseudopteroxazole also exhibited activity against strains of M.tuberculosis H37Rv resistant to six clinically used antibiotics.
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49
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Muñoz MA, Urzúa A, Echeverría J, Bucio MA, Hernández-Barragán A, Joseph-Nathan P. Determination of absolute configuration of salvic acid, an ent-labdane from Eupatorium salvia, by vibrational circular dichroism. PHYTOCHEMISTRY 2012; 80:109-114. [PMID: 22656857 DOI: 10.1016/j.phytochem.2012.04.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Revised: 03/16/2012] [Accepted: 04/24/2012] [Indexed: 06/01/2023]
Abstract
The relative stereochemistry at C13 and the absolute configuration of salvic acid, a constituent of the leaves of Eupatorium salvia, were established as the 13-(R)-ent-labdane 1. The results follow from vibrational circular dichroism measurements of the derived O-methyl ether methyl ester 3 which were compared to DFT B3LYP/DGDZVP calculated spectra. The relative stereochemistry of salvic acid at C13 was independently verified by single crystal X-ray diffraction measurements of 1, and of its derived diol 4.
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Affiliation(s)
- Marcelo A Muñoz
- Instituto de Ciencias Químicas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
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50
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Pauli GF, Chen SN, Friesen JB, McAlpine JB, Jaki BU. Analysis and purification of bioactive natural products: the AnaPurNa study. JOURNAL OF NATURAL PRODUCTS 2012; 75:1243-55. [PMID: 22620854 PMCID: PMC3381453 DOI: 10.1021/np300066q] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Based on a meta-analysis of data mined from almost 2000 publications on bioactive natural products (NPs) from >80000 pages of 13 different journals published in 1998-1999, 2004-2005, and 2009-2010, the aim of this systematic review is to provide both a survey of the status quo and a perspective for analytical methodology used for isolation and purity assessment of bioactive NPs. The study provides numerical measures of the common means of sourcing NPs, the chromatographic methodology employed for NP purification, and the role of spectroscopy and purity assessment in NP characterization. A link is proposed between the observed use of various analytical methodologies, the challenges posed by the complexity of metabolomes, and the inescapable residual complexity of purified NPs and their biological assessment. The data provide inspiration for the development of innovative methods for NP analysis as a means of advancing the role of naturally occurring compounds as a viable source of biologically active agents with relevance for human health and global benefit.
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Affiliation(s)
- Guido F Pauli
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, USA.
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