1
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Hu Z, Liu YN, Yu MH, Hou AJ, Li JY, Li YX, Lei C. Formyl phloroglucinol meroterpenoids from the leaves of Eucalyptus globulus subsp. maidenii and their ATP-citrate lyase inhibitory activities. Fitoterapia 2024; 173:105813. [PMID: 38184174 DOI: 10.1016/j.fitote.2023.105813] [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: 11/09/2023] [Revised: 12/29/2023] [Accepted: 12/29/2023] [Indexed: 01/08/2024]
Abstract
Three new formyl phloroglucinol meroterpenoids, eumaidials A-C (1-3), were isolated from the leaves of Eucalyptus globulus subsp. maidenii, along with ten known analogues (4-13). Their chemical structures were determined by various spectral data and electronic circular dichroism calculations. Eumaidial A (1) is the first β-caryophyllene-based formyl phloroglucinol meroterpenoids from the genus Eucalyptus. Compounds 1-4 and 10 exhibited ATP-citrate lyase inhibitory activities, and compounds 2 and 3 suppressed the hepatocyte lipogenesis.
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Affiliation(s)
- Zhu Hu
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yi-Nan Liu
- School of Pharmacy, Fudan University, Shanghai 201203, China; Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Mei-Hua Yu
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Ai-Jun Hou
- School of Pharmacy, Fudan University, Shanghai 201203, China; School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jing-Ya Li
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - Ying-Xia Li
- School of Pharmacy, Fudan University, Shanghai 201203, China.
| | - Chun Lei
- School of Pharmacy, Fudan University, Shanghai 201203, China.
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2
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Bracken AK, Gekko CE, Suss NO, Lueders EE, Cui Q, Fu Q, Lui ACW, Anderson ET, Zhang S, Abbasov ME. Biomimetic Synthesis and Chemical Proteomics Reveal the Mechanism of Action and Functional Targets of Phloroglucinol Meroterpenoids. J Am Chem Soc 2024; 146:2524-2548. [PMID: 38230968 PMCID: PMC11000255 DOI: 10.1021/jacs.3c10741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Natural products perennially serve as prolific sources of drug leads and chemical probes, fueling the development of numerous therapeutics. Despite their scarcity, natural products that modulate protein function through covalent interactions with lysine residues hold immense potential to unlock new therapeutic interventions and advance our understanding of the biological processes governed by these modifications. Phloroglucinol meroterpenoids constitute one of the most expansive classes of natural products, displaying a plethora of biological activities. However, their mechanism of action and cellular targets have, until now, remained elusive. In this study, we detail the concise biomimetic synthesis, computational mechanistic insights, physicochemical attributes, kinetic parameters, molecular mechanism of action, and functional cellular targets of several phloroglucinol meroterpenoids. We harness synthetic clickable analogues of natural products to probe their disparate proteome-wide reactivity and subcellular localization through in-gel fluorescence scanning and cell imaging. By implementing sample multiplexing and a redesigned lysine-targeting probe, we streamline a quantitative activity-based protein profiling, enabling the direct mapping of global reactivity and ligandability of proteinaceous lysines in human cells. Leveraging this framework, we identify numerous lysine-meroterpenoid interactions in breast cancer cells at tractable protein sites across diverse structural and functional classes, including those historically deemed undruggable. We validate that phloroglucinol meroterpenoids perturb biochemical functions through stereoselective and site-specific modification of lysines in proteins vital for breast cancer metabolism, including lipid signaling, mitochondrial respiration, and glycolysis. These findings underscore the broad potential of phloroglucinol meroterpenoids for targeting functional lysines in the human proteome.
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Affiliation(s)
- Amy K Bracken
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Colby E Gekko
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Nina O Suss
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Emma E Lueders
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Qi Cui
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Qin Fu
- Proteomics and Metabolomics Facility, Cornell University, Ithaca, New York 14853, United States
| | - Andy C W Lui
- Proteomics and Metabolomics Facility, Cornell University, Ithaca, New York 14853, United States
| | - Elizabeth T Anderson
- Proteomics and Metabolomics Facility, Cornell University, Ithaca, New York 14853, United States
| | - Sheng Zhang
- Proteomics and Metabolomics Facility, Cornell University, Ithaca, New York 14853, United States
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3
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Osawa T, Obika S. Synthesis of Coumarin-Conjugated Oligonucleotides via Knoevenagel Condensation to Prepare an Oligonucleotide Library. Chem Pharm Bull (Tokyo) 2024; 72:143-148. [PMID: 38296555 DOI: 10.1248/cpb.c23-00295] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
DNA-encoded libraries (DELs) are attracting attention as a screening tool in the early stages of drug discovery. In the development of DELs, drug candidate compounds are chemically synthesized on barcode DNA. Therefore, it is important to perform the synthesis under mild conditions so as to not damage the DNA. On the other hand, coumarins are gaining increasing research focus not only because they possess excellent fluorescence properties, but also because many medicines contain a coumarin skeleton. Among the various reactions developed for the synthesis of coumarins thus far, Knoevenagel condensation followed by intramolecular cyclization under mild conditions can yield coumarins. In this study, we developed a new synthetic method for preparing a coumarin-conjugated oligonucleotide library via Knoevenagel condensation. The results showed that coumarins substituted at the 5-, 6-, 7-, or 8-positions could be constructed on DNA to afford a total of 26 coumarin-conjugated DNAs. Moreover, this method was compatible with enzymatic ligation, demonstrating its utility in DEL synthesis. The developed strategy for the construction of coumarin scaffolds based on Knoevenagel condensation may contribute to the use of DELs in drug discovery and medicinal chemistry.
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Affiliation(s)
- Takashi Osawa
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Satoshi Obika
- Graduate School of Pharmaceutical Sciences, Osaka University
- Institute for Open and Transdisciplinary Research Initiatives, Osaka University
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4
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Daus M, Hayton JB, Holland DC, Voravuthikunchai SP, Carroll AR, Chakthong S. Camaldulensals A-C, the First Meroterpenoids Possessing Two Spatially Separated Formyl Phloroglucinols Conjugated to a Terpene Core from the Leaves of Eucalyptus camaldulensis Dehnh. JOURNAL OF NATURAL PRODUCTS 2023; 86:1994-2005. [PMID: 37578330 DOI: 10.1021/acs.jnatprod.3c00443] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Three new bis-formyl phloroglucinol-meroterpenoids (1-3), three new euglobal type formyl phloroglucinol-meroterpenoids (4-6), and one new dimeric formyl phloroglucinol (7) were isolated from the leaves of Eucalyptus camaldulensis. Camaldulensal A (1) is the first bis-isovaleryl-formyl-phloroglucinol-sesquiterpenoid. It features a novel 6/6/10/3/6/6 fused ring system and contains six stereogenic centers. Camaldulensals B (2) and C (3) are the first bis-isovaleryl-formyl-phloroglucinols, each conjugated to a monoterpene. Formyl phloroglucinol compounds (FPCs) containing two spatially separated formyl phloroglucinols conjugated to a terpene core such as 1-3 have not been reported previously. The structures of these compounds were elucidated by spectroscopic methods and computational analysis. Camaldulensals B (2) and C (3) exhibited significant antibacterial activity against methicillin-susceptible and methicillin-resistant Staphylococcus aureus. Structure activity relationships are discussed in relation to previously reported antibacterial activities of other molecules from the FPC structure class.
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Affiliation(s)
- Mareena Daus
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Joshua B Hayton
- School of Environment and Science, Griffith University, Southport, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Darren C Holland
- School of Environment and Science, Griffith University, Southport, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Supayang P Voravuthikunchai
- Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Anthony R Carroll
- School of Environment and Science, Griffith University, Southport, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Suda Chakthong
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
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5
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Li JS, Liu YN, Li JY, Lei C, Hou AJ. Acylphloroglucinol-monoterpene meroterpenoids from Eucalyptus tereticornis and their inhibitory activity against ATP citrate lyase. PHYTOCHEMISTRY 2023; 207:113565. [PMID: 36549384 DOI: 10.1016/j.phytochem.2022.113565] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
Five undescribed enantiomeric pairs of acylphloroglucinol-monoterpene meroterpenoids ((+)-/(-)-eucateretins A-E) resolved by chiral-phase HPLC were obtained from the leaves of Eucalyptus tereticornis Smith, along with nine known analogues. Their structures were elucidated by spectroscopic methods and ECD calculations. This is the first report of meroterpenoid enantiomers from this plant. Some of the isolates, (-)-eucateretin A, (+)-/(-)-eucateretins E, 7'α-eucalrobusone X, eucalrobusone X, and robustadial B, exhibited inhibitory effects on ATP citrate lyase, and 7'α-eucalrobusone X significantly suppressed the hepatocyte lipogenesis.
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Affiliation(s)
- Jin-Sheng Li
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Yi-Nan Liu
- School of Pharmacy, Fudan University, Shanghai, 201203, China; Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Jing-Ya Li
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chun Lei
- School of Pharmacy, Fudan University, Shanghai, 201203, China.
| | - Ai-Jun Hou
- School of Pharmacy, Fudan University, Shanghai, 201203, China; School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China.
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6
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Huang J, Li C, Ma J, Zang Y, Sun X, Chen X, Zhang D. Psiguamers A–C, three cytotoxic meroterpenoids bearing a methylated benzoylphloroglucinol framework from Psidium guajava and total synthesis of 1 and 2. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.11.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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7
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Singh Chouhan P, Singh D, Purohit P, Sharma G, Kant R, Shukla SK, Chauhan PMS. PPh
3
Catalyzed Post‐Transformation Ugi‐4CR Intramolecular Cyclization Reaction: One‐Pot Synthesis of Functionalized Spiropyrrolidinochromanones. ChemistrySelect 2021. [DOI: 10.1002/slct.202003936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Pradeep Singh Chouhan
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Sector 10, Jankipuram extension Sitapur Road Lucknow 226031 India
| | - Deepti Singh
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Sector 10, Jankipuram extension Sitapur Road Lucknow 226031 India
| | - Pooja Purohit
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Sector 10, Jankipuram extension Sitapur Road Lucknow 226031 India
| | - Gaurav Sharma
- Sophisticated Analytical Instrument Facility Division CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension Sitapur Road Lucknow 226031 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Ruchir Kant
- Molecular and Structural Biology Division CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension Sitapur Road Lucknow 226031 India
| | - Sanjeev K. Shukla
- Sophisticated Analytical Instrument Facility Division CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension Sitapur Road Lucknow 226031 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Prem M. S. Chauhan
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute, Sector 10, Jankipuram extension Sitapur Road Lucknow 226031 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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8
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Affiliation(s)
- Dattatraya H. Dethe
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Boda VijayKumar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
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9
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Wu J, Mu R, Sun M, Zhao N, Pan M, Li H, Dong Y, Sun Z, Bai J, Hu M, Nathan CF, Javid B, Liu G. Derivatives of Natural Product Agrimophol as Disruptors of Intrabacterial pH Homeostasis in Mycobacterium tuberculosis. ACS Infect Dis 2019; 5:1087-1104. [PMID: 31016962 DOI: 10.1021/acsinfecdis.8b00325] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This article reports the rational medicinal chemistry of a natural product, agrimophol (1), as a new disruptor of intrabacterial pH (pHIB) homeostasis in Mycobacterium tuberculosis (Mtb). Through the systematic investigation of the structure-activity relationship of 1, scaffold-hopping of the diphenylmethane scaffold, pharmacophore displacement strategies, and studies of the structure-metabolism relationship, a new derivative 5a was achieved. Compound 5a showed 100-fold increased potency in the ability to reduce pHIB to pH 6.0 and similarly improved mycobactericidal activity compared with 1 against both Mycobacterium bovis-BCG and Mtb. Compound 5a possessed improved metabolic stability in human liver microsomes and hepatocytes, lower cytotoxicity, higher selectivity index, and similar pKa value to natural 1. This study introduces a novel scaffold to an old drug, resulting in improved mycobactericidal activity through decreasing pHIB, and may contribute to the critical search for new agents to overcome drug resistance and persistence in the treatment of tuberculosis.
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Affiliation(s)
- Jie Wu
- Tsinghua-Peking Center for Life Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Ran Mu
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Mingna Sun
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Nan Zhao
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York 10065, United States
| | - Miaomiao Pan
- Centre for Global Health and Infectious Diseases, Collaborative Innovation Centre for the Diagnosis and Treatment of Infectious Diseases, Tsinghua University School of Medicine, Beijing 100084, China
| | - Hongshuang Li
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Yi Dong
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Zhaogang Sun
- National Tuberculosis Clinical Laboratory, Beijing Chest Hospital, Capital Medical University and Beijing Key Laboratory in Drug Resistant Tuberculosis Research, Beijing Tuberculosis & Thoracic Tumor Research Institute, 9 Beiguan Street, Tongzhou District, Beijing 101149, China
| | - Jie Bai
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, China
| | - Minwan Hu
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, China
| | - Carl F. Nathan
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York 10065, United States
| | - Babak Javid
- Centre for Global Health and Infectious Diseases, Collaborative Innovation Centre for the Diagnosis and Treatment of Infectious Diseases, Tsinghua University School of Medicine, Beijing 100084, China
| | - Gang Liu
- Tsinghua-Peking Center for Life Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
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10
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Boyko N, Pisarev D, Zhilyakova E, Pravlotskaya A, Novikov O, Makarevich N, Kuznietsova V, Sushchuk N. Study and modeling of the distribution process of some phenolic compounds between the solid and liquid phases. J Adv Pharm Technol Res 2019; 10:56-62. [PMID: 31041183 PMCID: PMC6474166 DOI: 10.4103/japtr.japtr_392_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
The article presents the results related to the study of distribution of biologically active substances from the plant raw material between solid and liquid phases. The aim of this study is to develop theoretical bases of the extraction process in the equilibrium state by the example of study and modeling of the distribution process of biologically active substances from Eucalyptus viminalis leaves. In these studies, we used ground plant raw material of E. viminalis leaves with particle fraction of 0.1-0.5 mm; and ethanol with concentration 80% ±1% v/v was used as an extractant. Qualitative and quantitative analyses were carried out by reversed phase high-performance liquid chromatography with rutin, chlorogenic acid, and euglobal standards equivalent to spissum extract of chlorophyllipt of the State Pharmacopoeia of Ukraine. A hypothesis has been suggested that Henry's adsorption law and the law of conservation of matter play a fundamental role in this process. The experimental data are described well by the suggested equation with high value of determination coefficient R 2 =0.99. At the same time, F-test and the significance of coefficients in equations satisfy the statistic condition, which means that the current hypothesis about the adsorption mechanism of distribution of biologically active substances in the extraction system is not refuted. The results of these studies demonstrate good agreement of experimental data and theoretical model based on Henry's adsorption law and mass balance. The numerical values of constants in the model suggested have been calculated.
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Affiliation(s)
- Nikolay Boyko
- Department of Pharmaceutical Technology, Belgorod State University, Belgorod, Russia
| | - Dmitriy Pisarev
- Department of Pharmaceutical Technology, Belgorod State University, Belgorod, Russia
| | - Elena Zhilyakova
- Department of Pharmaceutical Technology, Belgorod State University, Belgorod, Russia
| | - Alina Pravlotskaya
- Department of Pharmaceutical Technology, Belgorod State University, Belgorod, Russia
| | - Oleg Novikov
- Test Department "Drugs Quality Control Center" of the Shared Research and Education Center, Peoples' Friendship University of Russia (RUDN University), Moscow, Russia
| | - Nikolay Makarevich
- Department of Pulp and Paper and Wood Chemical Industries, Higher School of Natural Sciences and Technologies, M.V. Lomonosov Northern (Arctic) Federal University, Arkhangelsk, Russia
| | - Viktoria Kuznietsova
- Department of Chemistry of Natural Compounds, National University of Pharmacy, Kharkiv, Ukraine
| | - Natalia Sushchuk
- Department of Technology of Drugs, Odessa National Medical University, Odessa, Ukraine
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11
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Dethe DH, B VK, Maiti R. Biomimetic total syntheses of chromane meroterpenoids, guadials B and C, guapsidial A and psiguajadial D. Org Biomol Chem 2019; 16:4793-4796. [PMID: 29931003 DOI: 10.1039/c8ob01092g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The first biomimetic total syntheses of chromane meroterpenoids, guadials B and C, guapsidial A and psiguajadial D have been completed. The key synthetic transformation involves an efficient and high yielding hetero-Diels-Alder reaction. The two structurally isomeric natural products, guadials B and C, were obtained from a common o-quinone methide in the separate reactions with α-pinene and β-pinene, respectively. The two regioisomeric natural products, guapsidial A and psiguajadial D, were achieved in a single chemical operation.
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Affiliation(s)
- Dattatraya H Dethe
- Department of Chemistry, Indian Institute of Technology, Kanpur, 208016, India.
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12
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dos Santos BM, Zibrandtsen JFS, Gunbilig D, Sørensen M, Cozzi F, Boughton BA, Heskes AM, Neilson EHJ. Quantification and Localization of Formylated Phloroglucinol Compounds (FPCs) in Eucalyptus Species. FRONTIERS IN PLANT SCIENCE 2019; 10:186. [PMID: 30863416 PMCID: PMC6399404 DOI: 10.3389/fpls.2019.00186] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 02/05/2019] [Indexed: 05/05/2023]
Abstract
The Eucalyptus genus is a hyper-diverse group of long-lived trees from the Myrtaceae family, consisting of more than 700 species. Eucalyptus are widely distributed across their native Australian landscape and are the most widely planted hardwood forest trees in the world. The ecological and economic success of Eucalyptus trees is due, in part, to their ability to produce a plethora of specialized metabolites, which moderate abiotic and biotic interactions. Formylated phloroglucinol compounds (FPCs) are an important class of specialized metabolites in the Myrtaceae family, particularly abundant in Eucalyptus. FPCs are mono- to tetra-formylated phloroglucinol based derivatives, often with an attached terpene moiety. These compounds provide chemical defense against herbivory and display various bioactivities of pharmaceutical relevance. Despite their ecological and economic importance, and continued improvements into analytical techniques, FPCs have proved challenging to study. Here we present a simple and reliable method for FPCs extraction, identification and quantification by UHPLC-DAD-ESI-Q-TOF-MS/MS. The method was applied to leaf, flower bud, and flower samples of nine different eucalypt species, using a small amount of plant material. Authentic analytical standards were used to provide high resolution mass spectra and fragmentation patterns. A robust method provides opportunities for future investigations into the identification and quantification of FPCs in complex biological samples with high confidence. Furthermore, we present for the first time the tissue-based localization of FPCs in stem, leaf, and flower bud of Eucalyptus species measured by mass spectrometry imaging, providing important information for biosynthetic pathway discovery studies and for understanding the role of those compounds in planta.
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Affiliation(s)
- Bruna Marques dos Santos
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Juliane F. S. Zibrandtsen
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Disan Gunbilig
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mette Sørensen
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Federico Cozzi
- Section for Molecular Plant Biology, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Berin A. Boughton
- School of BioSciences, University of Melbourne, Parkville, VIC, Australia
- Metabolomics Australia, School of BioSciences, University of Melbourne, Parkville, VIC, Australia
| | - Allison Maree Heskes
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- Center for Synthetic Biology ‘bioSYNergy’, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Elizabeth Heather Jakobsen Neilson
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- Center for Synthetic Biology ‘bioSYNergy’, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- *Correspondence: Elizabeth Heather Jakobsen Neilson
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13
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Li D, Luong TTM, Dan WJ, Ren Y, Nien HX, Zhang AL, Gao JM. Natural products as sources of new fungicides (IV): Synthesis and biological evaluation of isobutyrophenone analogs as potential inhibitors of class-II fructose-1,6-bisphosphate aldolase. Bioorg Med Chem 2017; 26:386-393. [PMID: 29248352 DOI: 10.1016/j.bmc.2017.10.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 10/24/2017] [Accepted: 10/30/2017] [Indexed: 11/19/2022]
Abstract
Several recently identified antifungal compounds share the backbone structure of acetophenones. The aim of the present study was to develop new isobutyrophenone analogs as new antifungal agents. A series of new 2,4-dihydroxy-5-methyl isobutyrophenone derivatives were prepared and characterized by 1H, 13C NMR and MS spectroscopic data. These products were evaluated for in vitro antifungal activities against seven plant fungal pathogens by the mycelial growth inhibitory rate assay. Compounds 3, 4a, 5a, 5b, 5e, 5f and 5g showed a broad-spectrum high antifungal activity. On the other hand, for the first time, these compounds were also assayed as potential inhibitors against Class II fructose-1,6-bisphosphate aldolase (Fba) from the rice blast fungus, Magnaporthe grisea. Compounds 5e and 5g were found to exhibit the inhibition constants (Ki) for 15.12 and 14.27 μM, respectively, as the strongest competitive inhibitors against Fba activity. The possible binding-modes of compounds 5e and 5g were further analyzed by molecular docking algorithms. The results strongly suggested that compound 5g could be a promising lead for the discovery of new fungicides via targeting Class II Fba.
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Affiliation(s)
- Ding Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, Shaanxi Engineering Center of Bioresource Chemistry & Sustainable Utilization, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Tuong Thi Mai Luong
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, Shaanxi Engineering Center of Bioresource Chemistry & Sustainable Utilization, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; Institute of Scientific Research and Technological Development, Thu Dau Mot University, Binh Duong, Viet Nam
| | - Wen-Jia Dan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, Shaanxi Engineering Center of Bioresource Chemistry & Sustainable Utilization, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Yanliang Ren
- Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China.
| | - Hoang Xuan Nien
- Institute of Scientific Research and Technological Development, Thu Dau Mot University, Binh Duong, Viet Nam
| | - An-Ling Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, Shaanxi Engineering Center of Bioresource Chemistry & Sustainable Utilization, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, Shaanxi Engineering Center of Bioresource Chemistry & Sustainable Utilization, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.
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14
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Allen EE, Zhu C, Panek JS, Schaus SE. Multicomponent Condensation Reactions via ortho-Quinone Methides. Org Lett 2017; 19:1878-1881. [PMID: 28357870 DOI: 10.1021/acs.orglett.7b00647] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Iron(III) salts promote the condensation of aldehydes or acetals with electron-rich phenols to generate ortho-quinone methides that undergo Diels-Alder condensations with alkenes. The reaction sequence occurs in a single vessel to afford benzopyrans in up to 95% yield. The reaction was discovered while investigating a two-component strategy using 2-(hydroxy(phenyl)methyl)phenols to access the desired ortho-quinone methide in a Diels-Alder condensation. The two-component condensation also afforded the corresponding benzopyran products in yields up to 97%. Taken together, the two- and three-component strategies using ortho-quinone methide intermediates provide efficient access to benzopyrans in good yields and selectivities.
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Affiliation(s)
- Emily E Allen
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Life Science and Engineering Building, Boston University , 24 Cummington Mall, Boston, Massachusetts 02215, United States
| | - Calvin Zhu
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Life Science and Engineering Building, Boston University , 24 Cummington Mall, Boston, Massachusetts 02215, United States
| | - James S Panek
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Life Science and Engineering Building, Boston University , 24 Cummington Mall, Boston, Massachusetts 02215, United States
| | - Scott E Schaus
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Life Science and Engineering Building, Boston University , 24 Cummington Mall, Boston, Massachusetts 02215, United States
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15
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Eaton A, Dalal S, Cassera MB, Zhao S, Kingston DGI. Synthesis and Antimalarial Activity of Mallatojaponin C and Related Compounds. JOURNAL OF NATURAL PRODUCTS 2016; 79:1679-1683. [PMID: 27228055 PMCID: PMC4924580 DOI: 10.1021/acs.jnatprod.6b00347] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Indexed: 06/05/2023]
Abstract
The phloroglucinol mallotojaponin C (1) from Mallotus oppositifolius, which was previously shown by us to have both antiplasmodial and cytocidal activities against the malaria parasite Plasmodium falciparum, was synthesized in three steps from 2',4',6'-trihydroxyacetophenone, and various derivatives were synthesized in an attempt to improve the bioactivity of this class of compounds. Two derivatives, the simple prenylated phloroglucinols 12 and 13, were found to have comparable antiplasmodial activities to that of mallotojaponin C.
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Affiliation(s)
- Alexander
L. Eaton
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Seema Dalal
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - M. Belen Cassera
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Shuqi Zhao
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - David G. I. Kingston
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
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16
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Gervais A, Lazarski KE, Porco JA. Divergent Total Syntheses of Rhodomyrtosones A and B. J Org Chem 2016; 80:9584-91. [PMID: 26351970 DOI: 10.1021/acs.joc.5b01570] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Herein, we report total syntheses of the tetramethyldihydroxanthene natural product rhodomyrtosone B and the related bis-furan β-triketone natural product rhodomyrtosone A. Nickel-(II)-catalyzed 1,4-conjugate addition of an α-alkylidene-β-dicarbonyl substrate was developed to access the congener rhodomyrtosone B, and oxygenation of the same monoalkylidene derivative followed by cyclization was employed to obtain the bis-furan natural product rhodomyrtosone A.
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Affiliation(s)
- Anais Gervais
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University , 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Kiel E Lazarski
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University , 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - John A Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University , 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
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17
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18
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Abstract
The first total synthesis of rottlerin is described. The methodology allows the development of potential novel protein kinase C δ (PKCδ) analogues for better treatment of various diseases. Kamalachalcone A and dimeric rottlerin were synthesized in a very practical and economical way using FeCl3 as a catalyst.
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Affiliation(s)
- Kenneth K C Hong
- School of Chemistry, The University of New South Wales , Sydney, New South Wales 2052, Australia
| | - Graham E Ball
- School of Chemistry, The University of New South Wales , Sydney, New South Wales 2052, Australia
| | - David StC Black
- School of Chemistry, The University of New South Wales , Sydney, New South Wales 2052, Australia
| | - Naresh Kumar
- School of Chemistry, The University of New South Wales , Sydney, New South Wales 2052, Australia
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19
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Shen T, Fu Z, Che F, Dang H, Lin Y, Song Q. An efficient one-pot four-component synthesis of 5H-spiro[benzo[7,8]chromeno[2,3-c]pyrazole-7,3′-indoline]-2′,5,6(9H)-trione derivatives catalyzed by MgCl2. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Zhuo X, En-Zhen L, Hai L, Hong-Ju G, Ning S, Xue-Hui Z, Qi-Fang Q, Jiu-Hong W. Concise Synthesis and Cellular Evaluation of 3′-Formyl-4′,6′-dihydroxy-2′-methoxy-5′-methylchalcone (FMC) and Its Analogues. SYNTHETIC COMMUN 2014. [DOI: 10.1080/00397911.2014.930492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Xiang Zhuo
- a School of Pharmacy , Fourth Military Medical University , Xi'an , China
- b Department of Pharmacy, 306 Hospital of PLA , Beijing , China
| | - Li En-Zhen
- b Department of Pharmacy, 306 Hospital of PLA , Beijing , China
| | - Liang Hai
- b Department of Pharmacy, 306 Hospital of PLA , Beijing , China
- c School of Pharmacy , Anhui Medical University , Hefei , China
| | - Guo Hong-Ju
- b Department of Pharmacy, 306 Hospital of PLA , Beijing , China
| | - Shi Ning
- b Department of Pharmacy, 306 Hospital of PLA , Beijing , China
| | - Zhang Xue-Hui
- b Department of Pharmacy, 306 Hospital of PLA , Beijing , China
| | - Qian Qi-Fang
- b Department of Pharmacy, 306 Hospital of PLA , Beijing , China
| | - Wu Jiu-Hong
- a School of Pharmacy , Fourth Military Medical University , Xi'an , China
- b Department of Pharmacy, 306 Hospital of PLA , Beijing , China
- c School of Pharmacy , Anhui Medical University , Hefei , China
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21
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Park JS, Kwon JK, Kim HR, Kim HJ, Kim BS, Jung JY. Farnesol induces apoptosis of DU145 prostate cancer cells through the PI3K/Akt and MAPK pathways. Int J Mol Med 2014; 33:1169-76. [PMID: 24584843 DOI: 10.3892/ijmm.2014.1679] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 02/13/2014] [Indexed: 11/06/2022] Open
Abstract
The aim of this study was to investigate the effect of farnesol on the induction of apoptosis in DU145 prostate cancer cells. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay showed that cell proliferation decreased significantly in a dose- and time-dependent manner. 4',6-Diamidino-2-phenylindole staining showed that chromatin condensation in cells treated with 60 µM of farnesol was markedly higher than in the control groups. Farnesol increased the expression of p53, p-c-Jun N-terminal kinase, cleaved-caspase-3, Bax, and cleaved-caspase-9, but decreased the expression of p-phosphatidylinositol-3-kinase (PI3K), p-Akt, p-p38, Bcl-2, and p-extracellular signal-regulated protein kinase, in a dose-dependent manner. The apoptotic cell ratio increased in a dose-dependent manner. The tumor growth inhibitory effect of farnesol was investigated in a mouse model. Compared to the control group, tumor volume decreased significantly in the group administered 50 mg/kg farnesol. Apoptosis was frequently detected in this same group by terminal deoxynucleotidyl transferase dUTP nick-end labeling assay. The results indicated that farnesol induced apoptosis of DU145 prostate cancer cells through the PI3K/Akt and mitogen-activated protein kinase signaling pathways.
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Affiliation(s)
- Jin Soo Park
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan, Chungnam 340702, Republic of Korea
| | - Jung Ki Kwon
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan, Chungnam 340702, Republic of Korea
| | - Hye Ri Kim
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan, Chungnam 340702, Republic of Korea
| | - Hyeong Jin Kim
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan, Chungnam 340702, Republic of Korea
| | - Byeong Soo Kim
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan, Chungnam 340702, Republic of Korea
| | - Ji Youn Jung
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan, Chungnam 340702, Republic of Korea
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22
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Guo QY, Huang XJ, Zhao BX, Jian YQ, Luo SL, Wang Y, Ye WC. Five New Acylphloroglucinol Glycosides from the Leaves of Eucalyptus robusta. Nat Prod Commun 2014. [DOI: 10.1177/1934578x1400900218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Five new acylphloroglucinol glycosides, robustasides A-E (1–5), together with a known one (6), were isolated from the leaves of Eucalyptus robusta. The structures were elucidated on the basis of extensive spectroscopic and spectrometric analysis and chemical evidence. The absolute configuration of 1 was further determined by quantum chemical CD calculation.
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Affiliation(s)
- Qian-Yi Guo
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
| | - Bing-Xin Zhao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
| | - Yu-Qing Jian
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
| | - Shi-Lin Luo
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- Department of Phytochemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Ying Wang
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
- Department of Phytochemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
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23
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Singh MS, Nagaraju A, Anand N, Chowdhury S. ortho-Quinone methide (o-QM): a highly reactive, ephemeral and versatile intermediate in organic synthesis. RSC Adv 2014. [DOI: 10.1039/c4ra11444b] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
In this critical review, we provide a comprehensive view of the chemistry of ortho-quinone methides as versatile reactive intermediates in organic synthesis.
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Affiliation(s)
- Maya Shankar Singh
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| | - Anugula Nagaraju
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| | - Namrata Anand
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| | - Sushobhan Chowdhury
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
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24
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25
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High-throughput virtual screening of phloroglucinol derivatives against HIV-reverse transcriptase. Mol Divers 2013; 17:97-110. [DOI: 10.1007/s11030-012-9417-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Accepted: 12/20/2012] [Indexed: 10/27/2022]
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26
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Jian YQ, Wang Y, Huang XJ, Li GQ, Zhao BX, Guo QY, Ye WC. Two new euglobals from the leaves of Eucalyptus robusta. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2012; 14:831-837. [PMID: 22873485 DOI: 10.1080/10286020.2012.697457] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Two new euglobals, R1 (1) and R2 (2), together with eight known euglobals (3-10) were isolated from the leaves of Eucalyptus robusta. Their structures were established by means of spectroscopic analysis and single-crystal X-ray diffraction. Euglobal R1 (1) represents a new skeleton of formyl-isovaleryl phloroglucinol-coupled β-phellandrene.
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Affiliation(s)
- Yu-Qing Jian
- Department of Phytochemistry, China Pharmaceutical University, Nanjing, China
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27
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Use of SO3H-functionalized halogenfree ionic liquid ([MIM(CH2)4SO3H] [HSO4]) as efficient promoter for the synthesis of structurally diverse spiroheterocycles. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.06.085] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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28
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Chauthe SK, Bharate SB, Periyasamy G, Khanna A, Bhutani KK, Mishra PD, Singh IP. One pot synthesis and anticancer activity of dimeric phloroglucinols. Bioorg Med Chem Lett 2012; 22:2251-6. [DOI: 10.1016/j.bmcl.2012.01.089] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2011] [Revised: 01/05/2012] [Accepted: 01/24/2012] [Indexed: 10/14/2022]
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29
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Faqueti LG, Petry CM, Meyre-Silva C, Machado KE, Cruz AB, Garcia PA, Cechinel-Filho V, San Feliciano A, Monache FD. Euglobal-like compounds from the genus Eugenia. Nat Prod Res 2012; 27:28-31. [DOI: 10.1080/14786419.2012.656113] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Larissa G. Faqueti
- a Nucleo de Investigaçoes Quimico-Farmaceuticas (NIQFAR), Universidade do Vale do Itajaì , Itajaì , SC , Brazil
| | - Christiane Maes Petry
- a Nucleo de Investigaçoes Quimico-Farmaceuticas (NIQFAR), Universidade do Vale do Itajaì , Itajaì , SC , Brazil
| | - Christiane Meyre-Silva
- a Nucleo de Investigaçoes Quimico-Farmaceuticas (NIQFAR), Universidade do Vale do Itajaì , Itajaì , SC , Brazil
| | - Karima E. Machado
- a Nucleo de Investigaçoes Quimico-Farmaceuticas (NIQFAR), Universidade do Vale do Itajaì , Itajaì , SC , Brazil
| | - Alexandre Belle Cruz
- a Nucleo de Investigaçoes Quimico-Farmaceuticas (NIQFAR), Universidade do Vale do Itajaì , Itajaì , SC , Brazil
| | - Pablo A. Garcia
- b Department of Pharmaceutical Science , University of Salamanca , Salamanca , Spain
| | - Valdir Cechinel-Filho
- a Nucleo de Investigaçoes Quimico-Farmaceuticas (NIQFAR), Universidade do Vale do Itajaì , Itajaì , SC , Brazil
| | - Arturo San Feliciano
- b Department of Pharmaceutical Science , University of Salamanca , Salamanca , Spain
| | - Franco Delle Monache
- a Nucleo de Investigaçoes Quimico-Farmaceuticas (NIQFAR), Universidade do Vale do Itajaì , Itajaì , SC , Brazil
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30
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Bharate SB, Mudududdla R, Bharate JB, Battini N, Battula S, Yadav RR, Singh B, Vishwakarma RA. Tandem one-pot synthesis of flavans by recyclable silica–HClO4 catalyzed Knoevenagel condensation and [4 + 2]-Diels–Alder cycloaddition. Org Biomol Chem 2012; 10:5143-50. [DOI: 10.1039/c2ob25376c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Peng LY, He J, Xu G, Wu XD, Dong LB, Gao X, Cheng X, Su J, Li Y, Zhao QS. Euglobal-IIIa, a novel acylphloroglucinol-sesquiterpene derivative from Eucalyptus robusta: absolute structure and cytotoxicity. NATURAL PRODUCTS AND BIOPROSPECTING 2011; 1:101-103. [PMCID: PMC4131649 DOI: 10.1007/s13659-011-0021-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2011] [Accepted: 10/11/2011] [Indexed: 05/26/2023]
Abstract
Euglobal-IIIa (1), a novel acylphloroglucinol-sesquiterpene derivative, and a known analogue, have been isolated from leaves of Eucalyptus robusta. The structures was elucidated by extensive spectroscopic data and by comparison with data reported in literature, while the absolute configuration of 1 was determined by the X-ray diffraction analysis. Compound 1 exhibited comparable cytotoxicity with that of cisplatin against five human cancer cell lines HL-60, SMMC-7721, A-549, MCF-7, and SW480 with IC50 values of 15.7, 15.5, 17.6, 14.3, and 21.8 µM, respectively. ![]()
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Affiliation(s)
- Li-Yan Peng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Juan He
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Gang Xu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Xing-De Wu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Liao-Bin Dong
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Xiu Gao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Xiao Cheng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Jia Su
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Yan Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Qin-Shi Zhao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
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32
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Sidana J, Singh S, Arora SK, Foley WJ, Singh IP. Formylated phloroglucinols from Eucalyptus loxophleba foliage. Fitoterapia 2011; 82:1118-22. [DOI: 10.1016/j.fitote.2011.07.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 07/13/2011] [Accepted: 07/14/2011] [Indexed: 10/18/2022]
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33
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Sidana J, Foley WJ, Singh IP. Quantitative Analysis of Euglobals in Eucalyptus loxophleba Leaves by qNMR ¶. Nat Prod Commun 2011. [DOI: 10.1177/1934578x1100600918] [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
A simple, rapid, accurate and selective 1H NMR spectroscopic method to detect and quantify euglobals in the leaves of Eucalyptus loxophleba ssp. lissophloia has been developed. The method allows for the estimation of total concentration of diformylphloroglucinol-monoterpene adducts, as well as the quantitation of sabinene- and α/β-phellandrene-adducts, separately. The method was validated for accuracy, precision and linearity using as reference standards 2-ethyl phenol and mixtures of jensenone, a monomeric formylated phloroglucinol, and 2-ethyl phenol.
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Affiliation(s)
- Jasmeen Sidana
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, S.A.S. Nagar, Punjab-160062, India
| | - William J. Foley
- Research School of Biology, The Australian National University, Canberra 0200, Australia
| | - Inder Pal Singh
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, S.A.S. Nagar, Punjab-160062, India
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34
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Bharate SB, Singh IP. Quantitative structure–activity relationship study of phloroglucinol-terpene adducts as anti-leishmanial agents. Bioorg Med Chem Lett 2011; 21:4310-5. [DOI: 10.1016/j.bmcl.2011.05.053] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Revised: 05/07/2011] [Accepted: 05/17/2011] [Indexed: 11/28/2022]
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35
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Andersen F, Douglas NM, Bustos D, Galappaththy G, Qi G, Hsiang MS, Kusriastuti R, Mendis K, Taleo G, Whittaker M, Price RN, von Seidlein L. Trends in malaria research in 11 Asian Pacific countries: an analysis of peer-reviewed publications over two decades. Malar J 2011; 10:131. [PMID: 21586174 PMCID: PMC3118956 DOI: 10.1186/1475-2875-10-131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 05/18/2011] [Indexed: 12/01/2022] Open
Abstract
Background Quantitative data are lacking on published malaria research. The purpose of the study is to characterize trends in malaria-related literature from 1990 to 2009 in 11 Asian-Pacific countries that are committed to malaria elimination as a national goal. Methods A systematic search was conducted for articles published from January 1990 to December 2009 in PubMed/MEDLINE using terms for malaria and 11 target countries (Bhutan, China, North Korea, Indonesia, Malaysia, Philippines, Solomon Islands, South Korea, Sri Lanka, Thailand and Vanuatu). The references were collated and categorized according to subject, Plasmodium species, and whether they contained original or derivative data. Results 2,700 articles published between 1990 and 2009 related to malaria in the target countries. The annual output of malaria-related papers increased linearly whereas the overall biomedical output from these countries grew exponentially. The percentage of malaria-related publications was nearly 3% (111/3741) of all biomedical publications in 1992 and decreased to less than 1% (118/12171; p < 0.001) in 2009. Thailand had the highest absolute output of malaria-related papers (n = 1211), followed by China (n = 609) and Indonesia (n = 346). Solomon Islands and Vanuatu had lower absolute numbers of publications, but both countries had the highest number of publications per capita (1.3 and 2.5 papers/1,000 population). The largest percentage of papers concerned the epidemiology and control of malaria (53%) followed by studies of drugs and drug resistance (47%). There was an increase in the proportion of articles relating to epidemiology, entomology, biology, molecular biology, pathophysiology and diagnostics from the first to the second decade, whereas the percentage of papers on drugs, clinical aspects of malaria, immunology, and social sciences decreased. Conclusions The proportion of malaria-related publications out of the overall biomedical output from the 11 target Asian-Pacific countries is decreasing. The discovery and evaluation of new, safe and effective drugs and vaccines is paramount. In addition the elimination of malaria will require operational research to implement and scale up interventions.
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Affiliation(s)
- Finn Andersen
- Global Health Division, Menzies School of Health Research, Casuarina, NT 0811, Australia
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Arya AK, Kumar M. Base catalyzed multicomponent synthesis of spiroheterocycles with fused heterosystems. Mol Divers 2011; 15:781-9. [DOI: 10.1007/s11030-011-9309-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2010] [Accepted: 02/28/2011] [Indexed: 11/29/2022]
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Sidana J, Rohilla RK, Roy N, Barrow RA, Foley WJ, Singh IP. Antibacterial sideroxylonals and loxophlebal A from Eucalyptus loxophleba foliage. Fitoterapia 2010; 81:878-83. [PMID: 20570611 DOI: 10.1016/j.fitote.2010.05.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2010] [Revised: 05/25/2010] [Accepted: 05/26/2010] [Indexed: 11/30/2022]
Abstract
Loxophlebal A, a new antibacterial formylated phloroglucinol was isolated from the mother liquor obtained after separation of sideroxylonals from the chloroform-methanol extract of leaves of Eucalyptus loxophleba ssp lissophloia. The structure of loxophlebal A was determined to be 3-desformyl sideroxylonal A by spectroscopic methods including 1D- and 2D-NMR. The stereochemistry of loxophlebal A was determined by chemical correlation with sideroxylonal A. This article also reports an efficient, simple and economic method for large scale isolation of sideroxylonals in a purity of >90% from the leaves of Eucalyptus loxophleba ssp lissophloia.
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Affiliation(s)
- Jasmeen Sidana
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S. Nagar, Punjab-160062, India
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Chauthe SK, Bharate SB, Sabde S, Mitra D, Bhutani KK, Singh IP. Biomimetic synthesis and anti-HIV activity of dimeric phloroglucinols. Bioorg Med Chem 2010; 18:2029-36. [DOI: 10.1016/j.bmc.2010.01.023] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Revised: 01/08/2010] [Accepted: 01/09/2010] [Indexed: 11/30/2022]
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Singh IP, Sidana J, Bharate SB, Foley WJ. Phloroglucinol compounds of natural origin: Synthetic aspects. Nat Prod Rep 2010; 27:393-416. [DOI: 10.1039/b914364p] [Citation(s) in RCA: 170] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Marcaccini S, Neo AG, Marcos CF. Sequential five-component synthesis of spiropyrrolidinochromanones. J Org Chem 2009; 74:6888-90. [PMID: 19634867 DOI: 10.1021/jo900992w] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein we report a novel, diastereoselective, one-pot, two-step, sequential synthesis of highly functionalized natural product-like spiropyrrolidinochromanones. The process consists of an Ugi four-component condensation of 3-formylchromones with amines, isocyanides, and glyoxylic acids followed by a nucleophilic conjugate addition and intramolecular cyclization. The experimental simplicity and tolerance to a wide variety of substituents makes this method suitable for combinatorial synthesis.
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Affiliation(s)
- Stefano Marcaccini
- Dipartimento di Chimica Organica Ugo Schiff, Università di Firenze, 50019 Sesto Fiorentino FI, Italy.
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Singh IP, Sidana J, Bansal P, Foley WJ. Phloroglucinol compounds of therapeutic interest: global patent and technology status. Expert Opin Ther Pat 2009; 19:847-66. [DOI: 10.1517/13543770902916614] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Bharate SB, Rodge A, Joshi RK, Kaur J, Srinivasan S, Kumar SS, Kulkarni-Almeida A, Balachandran S, Balakrishnan A, Vishwakarma RA. Discovery of diacylphloroglucinols as a new class of GPR40 (FFAR1) agonists. Bioorg Med Chem Lett 2008; 18:6357-61. [PMID: 18993064 DOI: 10.1016/j.bmcl.2008.10.085] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2008] [Revised: 09/26/2008] [Accepted: 10/20/2008] [Indexed: 10/21/2022]
Abstract
In this letter, we report discovery of diacylphloroglucinol compounds as a new class of GPR40 (FFAR1) agonists. Several diacylphloroglucinols with varying length of acyl functionality and substitution on aromatic hydroxyls were synthesized and evaluated for GPR40 agonism using functional calcium-flux assay. Out of 17 compounds evaluated, 14, 17, 19 and 25 exhibited good GPR40 agonistic activity with EC(50) values ranging from 0.07 to 8 microM (pEC(50) 7.12-5.09), respectively, with maximal agonistic response of 84-102%.
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Affiliation(s)
- Sandip B Bharate
- Department of Medicinal Chemistry, Piramal Life Sciences Limited, 1 Nirlon Complex, Off Western Express Highway, Goregaon (E), Mumbai 400063, India
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Sugimoto H, Nakamura S, Ohwada T. Generation and Application ofo-Quinone Methides Bearing Various Substituents on the Benzene Ring. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600508] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Mammino L, Kabanda MM. Model structures for the study of acylated phloroglucinols and computational study of the caespitate molecule. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.theochem.2006.10.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Affiliation(s)
- Inder Pal Singh
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, SAS Nagar, Punjab 160062, India.
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