1
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Nuutila A, Xiao X, van der Heul HU, van Wezel GP, Dinis P, Elsayed SS, Metsä-Ketelä M. Divergence of Classical and C-Ring-Cleaved Angucyclines: Elucidation of Early Tailoring Steps in Lugdunomycin and Thioangucycline Biosynthesis. ACS Chem Biol 2024; 19:1131-1141. [PMID: 38668630 PMCID: PMC11106748 DOI: 10.1021/acschembio.4c00082] [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] [Received: 02/02/2024] [Revised: 04/16/2024] [Accepted: 04/16/2024] [Indexed: 05/18/2024]
Abstract
Angucyclines are an important group of microbial natural products that display tremendous chemical diversity. Classical angucyclines are composed of a tetracyclic benz[a]anthracene scaffold with one ring attached at an angular orientation. However, in atypical angucyclines, the polyaromatic aglycone is cleaved at A-, B-, or C-rings, leading to structural rearrangements and enabling further chemical variety. Here, we have elucidated the branching points in angucycline biosynthesis leading toward cleavage of the C-ring in lugdunomycin and thioangucycline biosynthesis. We showed that 12-hydroxylation and 6-ketoreduction of UWM6 are shared steps in classical and C-ring-cleaved angucycline pathways, although the bifunctional 6-ketoreductase LugOIIred harbors additional unique 1-ketoreductase activity. We identified formation of the key intermediate 8-O-methyltetrangomycin by the LugN methyltransferase as the branching point toward C-ring-cleaved angucyclines. The final common step in lugdunomycin and thioangucycline biosynthesis is quinone reduction, catalyzed by the 7-ketoreductases LugG and TacO, respectively. In turn, the committing step toward thioangucyclines is 12-ketoreduction catalyzed by TacA, for which no orthologous protein exists on the lugdunomycin pathway. Our results confirm that quinone reductions are early tailoring steps and, therefore, may be mechanistically important for subsequent C-ring cleavage. Finally, many of the tailoring enzymes harbored broad substrate promiscuity, which we utilized in combinatorial enzymatic syntheses to generate the angucyclines SM 196 A and hydranthomycin. We propose that enzyme promiscuity and the competition of many of the enzymes for the same substrates lead to a branching biosynthetic network and formation of numerous shunt products typical for angucyclines rather than a canonical linear metabolic pathway.
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Affiliation(s)
- Aleksi Nuutila
- Department
of Life Technologies, University of Turku, FIN20014 Turku, Finland
| | - Xiansha Xiao
- Molecular
Biotechnology, Leiden University, PO Box 9505, 2300RA Leiden, The
Netherlands
| | - Helga U. van der Heul
- Molecular
Biotechnology, Leiden University, PO Box 9505, 2300RA Leiden, The
Netherlands
| | - Gilles P. van Wezel
- Molecular
Biotechnology, Leiden University, PO Box 9505, 2300RA Leiden, The
Netherlands
| | - Pedro Dinis
- Department
of Life Technologies, University of Turku, FIN20014 Turku, Finland
| | - Somayah S. Elsayed
- Molecular
Biotechnology, Leiden University, PO Box 9505, 2300RA Leiden, The
Netherlands
| | - Mikko Metsä-Ketelä
- Department
of Life Technologies, University of Turku, FIN20014 Turku, Finland
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2
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Tistechok S, Roman I, Fedorenko V, Luzhetskyy A, Gromyko O. Diversity and bioactive potential of Actinomycetia from the rhizosphere soil of Juniperus excelsa. Folia Microbiol (Praha) 2023:10.1007/s12223-023-01047-x. [PMID: 36947395 PMCID: PMC10031196 DOI: 10.1007/s12223-023-01047-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 03/15/2023] [Indexed: 03/23/2023]
Abstract
Microbial natural products are among the main sources of compounds used in the medical biotechnology field for the purpose of drug development. However, as antibiotic resistance in pathogenic microorganisms is known to be increasing dramatically, there exists a need to develop new antibiotics. Actinomycetia have proven to be a good source of biologically active compounds, although the rediscovery of previously known compounds significantly slows down the introduction of new antibiotics. As a consequence, increasing attention is being paid to the isolation of actinomycete strains from previously unexplored sources, which can significantly increase the likelihood of discovering new biologically active compounds. This study investigated the diversity and bioactive potential of 372 actinomycete strains isolated from the rhizosphere soil of Juniperus excelsa M. Bieb. The examined actinomycete strains belonged to 11 genera, namely, Actinoplanes, Actinorectispora, Amycolatopsis, Kribbella, Micrococcus, Micromonospora, Nocardia, Promicromonospora, Rhodococcus, Saccharopolyspora and Streptomyces. The bioactive potential of each isolated actinomycete strain was determined on the basis of its ability to produce antimicrobial metabolites against Gram-positive and Gram-negative bacteria and yeast. Some 159 strains (42.74%) exhibited antimicrobial activity against at least one of the tested microbial strains. The dereplication analysis of the extract of the Streptomyces sp. Je 1-651 strain, which exhibited strong antimicrobial activity, led to the annotation of spiramycins and stambomycins. Moreover, the phylogenetic analysis based on the 16S rRNA gene sequence of the Je 1-651 strain revealed it to be close to the S. ambofaciens.
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Affiliation(s)
- Stepan Tistechok
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine
| | - Ivan Roman
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine
| | - Victor Fedorenko
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine
| | - Andriy Luzhetskyy
- Department of Pharmaceutical Biotechnology, Saarland University, Saarbruecken, 66123, Germany
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Saarbruecken, 66123, Germany
| | - Oleksandr Gromyko
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine.
- Microbial Culture Collection of Antibiotic Producers, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine.
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3
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Uiterweerd M, Minnaard AJ. Racemic Total Synthesis of Elmonin and Pratenone A, from Streptomyces, Using a Common Intermediate Prepared by peri-Directed C-H Functionalization. Org Lett 2022; 24:9361-9365. [PMID: 36533980 PMCID: PMC9806855 DOI: 10.1021/acs.orglett.2c03449] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Indexed: 12/23/2022]
Abstract
The first total synthesis of elmonin and pratenone A, two complex rearranged angucyclinones from Streptomyces, is reported. Using peri-directed C-H functionalization, the key naphthalene fragment present in both synthetic targets was efficiently prepared. Coupling to two anisole-derived fragments gave access to the natural products, in which elmonin was prepared using a biomimetic spiro-ketalization.
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Affiliation(s)
- Michiel
T. Uiterweerd
- University of Groningen, Stratingh Institute for Chemistry, Nijenborgh 7, 9747
AG Groningen, The Netherlands
| | - Adriaan J. Minnaard
- University of Groningen, Stratingh Institute for Chemistry, Nijenborgh 7, 9747
AG Groningen, The Netherlands
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4
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Fu XZ, Zhang SM, Wang GF, Yang QL, Guo L, Pescitelli G, Xie ZP. Atypical Angucyclinones with Ring Expansion and Cleavage from a Marine Streptomyces sp. J Org Chem 2022; 87:15998-16010. [PMID: 36395479 DOI: 10.1021/acs.joc.2c02134] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A unique ring C-expanded angucyclinone, oxemycin A (1), and seven new ring-cleavage derivatives (2-5 and 9-11) were isolated from the marine actinomycete Streptomyces pratensis KCB-132, together with eight known analogues (6-8 and 12-16). Their structures were elucidated by spectroscopic analyses, single-crystal X-ray diffractions, and NMR and ECD calculations. Among these atypical angucyclinones, compound 1 represented the first seven-membered ketoester in the angucyclinone family, which sheds light on the origin of fragmented angucyclinones with C-ring cleavage at C-12/C-12a in the Baeyer-Villiger hypothesis, such as 2-4, while the related "nonoxidized" analogues 5-8 seem to originate from a diverse pathway within the Grob fragmentation hypothesis. Additionally, we have succeeded in the challenging separation of elmenols E and F (12) into their four stereoisomers, which remained stable in aprotic solvents but rapidly racemized under protic conditions. Furthermore, the absolute configurations of LS1924 and its isomers (14 and 15) were assigned by ECD calculations for the first time. Surprisingly, these two bicyclic acetals are susceptible to hydrolysis in solution, resulting in fragmented derivatives 17 and 18 with C-ring cleavage between C-6a and C-7. Compared with ring C-modified angucyclinones, ring A-cleaved 11 was more active to multiple resistant "ESKAPE" pathogens with MIC values ranging from 4.7 to 37.5 μg/mL.
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Affiliation(s)
- Xin-Zhen Fu
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Shu-Min Zhang
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Guang-Fei Wang
- College of Life Sciences, Yantai University, Yantai 264003, China
| | - Qiao-Li Yang
- College of Life Sciences, Yantai University, Yantai 264003, China
| | - Lin Guo
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, 56124 Pisa, Italy
| | - Ze-Ping Xie
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
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5
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Spiegel M, Sroka Z. Natural dihydroisobenzofuran derivatives as a template for promising radical scavengers: theoretical insights into structure–activity relationships, thermochemistry and kinetics. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02922-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AbstractDihydroisobenzofuran heterocycle is a structural motif found in a number of medications with anti-tumour, anti-diabetic, and antibacterial activities. It is also found in a slew of natural substances, most notably fungus metabolites, which have been shown to possess credible radical scavenging activity. Density functional theory studies on three different derivatives were conducted to investigate their electronic structures as well as thermochemical and kinetic behaviour against ·OOH, ·OH, and ·OCH3 in biologically relevant solvents, with the goal of elucidating structure–activity relationships and discussing the potential role of the scaffolds as a template for new semisynthetic antioxidants. The importance of resonance and inductive effects, and also hydrogen bonding, has been underlined, but most importantly, it has been demonstrated that all structures have considerable scavenging potential against all studied radicals, with reactions rates close to the diffusion limit.
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6
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Cao M, Zheng C, Yang D, Kalkreuter E, Adhikari A, Liu YC, Rateb ME, Shen B. Cryptic Sulfur Incorporation in Thioangucycline Biosynthesis. Angew Chem Int Ed Engl 2021; 60:7140-7147. [PMID: 33465268 PMCID: PMC7969429 DOI: 10.1002/anie.202015570] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 12/30/2020] [Indexed: 12/16/2022]
Abstract
Sulfur incorporation into natural products is a critical area of biosynthetic studies. Recently, a subset of sulfur-containing angucyclines has been discovered, and yet, the sulfur incorporation step is poorly understood. In this work, a series of thioether-bridged angucyclines were discovered, and a cryptic epoxide Michael acceptor intermediate was revealed en route to thioangucyclines (TACs) A and B. However, systematic gene deletion of the biosynthetic gene cluster (BGC) by CRISPR/Cas9 could not identify any gene responsible for the conversion of the epoxide intermediate to TACs. Instead, a series of in vitro and in vivo experiments conclusively showed that the conversion is the result of two non-enzymatic steps, possibly mediated by endogenous hydrogen sulfide. Therefore, the TACs are proposed to derive from a detoxification process. These results are expected to contribute to the study of both angucyclines and the utilization of inorganic sulfur in natural product biosynthesis.
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Affiliation(s)
| | | | - Dong Yang
- Department of Chemistry, Department of Molecular Medicine, Natural Products Discovery Center at Scripps Research, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Edward Kalkreuter
- Department of Chemistry, Department of Molecular Medicine, Natural Products Discovery Center at Scripps Research, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Ajeeth Adhikari
- Department of Chemistry, Department of Molecular Medicine, Natural Products Discovery Center at Scripps Research, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Yu-Chen Liu
- Department of Chemistry, Department of Molecular Medicine, Natural Products Discovery Center at Scripps Research, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Mostafa E. Rateb
- Department of Chemistry, Department of Molecular Medicine, Natural Products Discovery Center at Scripps Research, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Ben Shen
- Department of Chemistry, Department of Molecular Medicine, Natural Products Discovery Center at Scripps Research, The Scripps Research Institute, Jupiter, Florida 33458, United States
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7
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Cao M, Zheng C, Yang D, Kalkreuter E, Adhikari A, Liu Y, Rateb ME, Shen B. Cryptic Sulfur Incorporation in Thioangucycline Biosynthesis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mingming Cao
- Department of Chemistry Department of Molecular Medicine Natural Products Discovery Center at Scripps Research The Scripps Research Institute Jupiter FL 33458 USA
| | - Chengjian Zheng
- Department of Chemistry Department of Molecular Medicine Natural Products Discovery Center at Scripps Research The Scripps Research Institute Jupiter FL 33458 USA
| | - Dong Yang
- Department of Chemistry Department of Molecular Medicine Natural Products Discovery Center at Scripps Research The Scripps Research Institute Jupiter FL 33458 USA
| | - Edward Kalkreuter
- Department of Chemistry Department of Molecular Medicine Natural Products Discovery Center at Scripps Research The Scripps Research Institute Jupiter FL 33458 USA
| | - Ajeeth Adhikari
- Department of Chemistry Department of Molecular Medicine Natural Products Discovery Center at Scripps Research The Scripps Research Institute Jupiter FL 33458 USA
| | - Yu‐Chen Liu
- Department of Chemistry Department of Molecular Medicine Natural Products Discovery Center at Scripps Research The Scripps Research Institute Jupiter FL 33458 USA
| | - Mostafa E. Rateb
- Department of Chemistry Department of Molecular Medicine Natural Products Discovery Center at Scripps Research The Scripps Research Institute Jupiter FL 33458 USA
| | - Ben Shen
- Department of Chemistry Department of Molecular Medicine Natural Products Discovery Center at Scripps Research The Scripps Research Institute Jupiter FL 33458 USA
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8
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Mikhaylov AA, Ikonnikova VA, Solyev PN. Disclosing biosynthetic connections and functions of atypical angucyclinones with a fragmented C-ring. Nat Prod Rep 2021; 38:1506-1517. [PMID: 33480893 DOI: 10.1039/d0np00082e] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review on atypical angucyclinones possessing an aromatic cleavage of the C-ring covers literature between 1995 and early 2020.The unusual framework of the middle C-ring, "broken" as a result of biotransformations and oxidations in vivo and bearing an sp3-C connection, is of interest for biosynthetic investigations. The reported 39 natural compounds (55 including stereoisomers) have been analyzed and arranged into three structural groups. The biosynthetic origin of all these compounds has been thoroughly reviewed and revised, based on the found connections with oxidized angucyclinone structures. The data on biological activities has been summarized. Careful consideration of the origin of the structure allowed us to outline a hypothesis on the biological function as well as prospective applications of such atypical angucyclinones.
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Affiliation(s)
- Andrey A Mikhaylov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 16/10 Miklukho-Maklaya St., Moscow, 117997, Russia.
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9
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Tistechok S, Mytsyk Y, Fedorenko V, Gromyko O. Biosynthetic Potential of Actinomycetes from Helianthemum stevenii Rupr. Ex Juz. & Pozd. Rhizosphere. INNOVATIVE BIOSYSTEMS AND BIOENGINEERING 2019. [DOI: 10.20535/ibb.2019.3.2.170129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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10
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Zhang S, Yang Q, Guo L, Zhang Y, Feng L, Zhou L, Yang S, Yao Q, Pescitelli G, Xie Z. Isolation, structure elucidation and racemization of (+)- and (-)-pratensilins A-C: unprecedented spiro indolinone-naphthofuran alkaloids from a marine Streptomyces sp. Chem Commun (Camb) 2018; 53:10066-10069. [PMID: 28840219 DOI: 10.1039/c7cc04983h] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three pairs of new enantiomeric alkaloids with an unprecedented spiro indolinone-naphthofuran skeleton were isolated from a marine Streptomyces sp. The pure enantiomers had a marked difference in the enantiomerization processes for the three compounds. DFT calculations in combination with chemical derivatization were performed to corroborate the racemization process via a keto-enol-type tautomerism.
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Affiliation(s)
- Shumin Zhang
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China.
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11
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Gopalakrishnan S, Rajendran V, Arumugam S, Sharma HC, Vadlamudi S, Bhimineni RK, V Gonzalez S, M Melø T, Simic N. Insecticidal activity of a novel fatty acid amide derivative from Streptomyces species against Helicoverpa armigera. Nat Prod Res 2016; 30:2760-2769. [PMID: 26956775 DOI: 10.1080/14786419.2016.1154055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Helicoverpa armigera, an important pest causes serious damage to grain legumes. The main objective of this study was to isolate and identify the metabolite against H. armigera from a previously characterised Streptomyces sp. CAI-155. The culture filtrate of CAI-155 was extracted using Diaion HP-20 and the active fractions were fractionated on Silica and C18 column chromatography. The C18 active fraction was further fractionated on Silica gel 60 F254 thin layer chromatography (TLC). The most active fraction (Rf 0.64) purified from TLC led to the identification of a novel metabolite N-(1-(2,2-dimethyl-5-undecyl-1,3-dioxolan-4-yl)-2-hydroxyethyl)stearamide by spectral studies. The purified metabolite showed 70-78% mortality in 2nd instar H. armigera by diet impregnation assay, detached leaf assay and greenhouse assay. The LD50 and LD90 values of the purified metabolite were 627 and 2276 ppm, respectively. Hence, this novel metabolite can be exploited for pest management in future.
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Affiliation(s)
| | - Vijayabharathi Rajendran
- a International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) , Patancheru , India
| | - Sathya Arumugam
- a International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) , Patancheru , India
| | - Hari C Sharma
- a International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) , Patancheru , India
| | - Srinivas Vadlamudi
- a International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) , Patancheru , India
| | - Ratna Kumari Bhimineni
- a International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) , Patancheru , India
| | - Susana V Gonzalez
- b Department of Chemistry , Norwegian University of Science and Technology (NTNU) , Trondheim , Norway
| | - Torunn M Melø
- c Department of Biotechnology , Norwegian University of Science and Technology (NTNU) , Trondheim , Norway
| | - Nebojsa Simic
- b Department of Chemistry , Norwegian University of Science and Technology (NTNU) , Trondheim , Norway
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12
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Abdelfattah MS, Arai MA, Ishibashi M. Bioactive Secondary Metabolites with Unique Aromatic and Heterocyclic Structures Obtained from Terrestrial Actinomycetes Species. Chem Pharm Bull (Tokyo) 2016; 64:668-75. [DOI: 10.1248/cpb.c16-00038] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Mohamed S. Abdelfattah
- Graduate School of Pharmaceutical Sciences, Chiba University
- Chemistry Department, Faculty of Science,
Helwan University
| | - Midori A. Arai
- Graduate School of Pharmaceutical Sciences, Chiba University
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13
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Bankar SK, Mathew J, Ramasastry SSV. Synthesis of benzofurans via an acid catalysed transacetalisation/Fries-type O → C rearrangement/Michael addition/ring-opening aromatisation cascade of β-pyrones. Chem Commun (Camb) 2016; 52:5569-72. [DOI: 10.1039/c6cc01016d] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An unusual and facile approach for the synthesis of 2-benzofuranyl-3-hydroxyacetones from 6-acetoxy-β-pyrones and phenols is presented.
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Affiliation(s)
- Siddheshwar K. Bankar
- Organic Synthesis and Catalysis Lab
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Mohali
- Manuali PO
- India
| | - Jopaul Mathew
- Organic Synthesis and Catalysis Lab
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Mohali
- Manuali PO
- India
| | - S. S. V. Ramasastry
- Organic Synthesis and Catalysis Lab
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Mohali
- Manuali PO
- India
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14
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Yixizhuoma, Tsukahara K, Toume K, Ishikawa N, Abdelfattah MS, Ishibashi M. Novel cytotoxic isobenzofuran derivatives from Streptomyces sp. IFM 11490. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.116] [Citation(s) in RCA: 12] [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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15
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Albaflavenol B, a new sesquiterpene isolated from the terrestrial actinomycete, Streptomyces sp. J Antibiot (Tokyo) 2014; 68:286-8. [DOI: 10.1038/ja.2014.138] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 07/12/2014] [Accepted: 08/01/2014] [Indexed: 11/08/2022]
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16
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Bioactive heterocyclic natural products from actinomycetes having effects on cancer-related signaling pathways. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2014; 99:147-98. [PMID: 25296439 DOI: 10.1007/978-3-319-04900-7_3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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17
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Liu WZ, Ma LY, Liu DS, Huang YL, Wang CH, Shi SS, Pan XH, Song XD, Zhu RX. Peniciketals A–C, New Spiroketals from Saline Soil Derived Penicillium raistrichii. Org Lett 2013; 16:90-3. [DOI: 10.1021/ol403076s] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wei-Zhong Liu
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Li-Ying Ma
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - De-Sheng Liu
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Yu-Ling Huang
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Chun-Hua Wang
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Shou-Sen Shi
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Xiao-Hong Pan
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Xiao-Dong Song
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Rong-Xiu Zhu
- Institute of
Theoretical Chemistry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People’s Republic of China
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