1
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Basu P, Satam N, Pati S, Suresh A, Namboothiri INN. Reactions of Sulfonylphthalide with Diverse Activated Imines for the Synthesis of Enaminophthalides, Spiro-isoquinolinones, and Homalicine Natural Products. J Org Chem 2022; 88:4038-4051. [PMID: 35797456 DOI: 10.1021/acs.joc.2c00816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactivity of the Hauser-Kraus (H-K) donor, 3-sulfonylphthalide, with various activated imines under basic conditions is demonstrated. The reaction of 3-sulfonylphthalide with Boc-protected aldimine provides a rapid access to 1,2-imine adducts and alkylidenephthalides depending upon the stoichiometry of the base. The alkylidenephthalides could be transformed to ketophthalides, a new class of phthalides, on acid hydrolysis, which upon reductive cyclization using Zn/AcOH afforded the natural product homalicine. On the contrary, the Boc-protected isatinimines undergo an efficient H-K annulation to provide spiro-isoquinolinone-oxindoles in excellent yields. However, the corresponding conjugated ketimines afforded Michael adducts, which were converted to the corresponding alkylidenephthalides under TBAF conditions.
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Affiliation(s)
- Pallabita Basu
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | - Nishikant Satam
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | - Soumyaranjan Pati
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | - Alati Suresh
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
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2
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Takeuchi T, Hatano M, Muramatsu H, Kubota Y, Sawa R, Igarashi M. Micromonosporamide A with Glutamine-Dependent Cytotoxicity from Micromonospora sp. MM609M-173N6: Isolation, Stereochemical Determination, and Synthesis. Org Lett 2021; 23:7981-7985. [PMID: 34585936 DOI: 10.1021/acs.orglett.1c02974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An acyldipeptide, micromonosporamide A, was isolated from the fermentation broth of Micromonospora sp. MM609M-173N6 by bioassay-guided fractionation using a glutamine compensation assay. The planar structure was elucidated on the basis of comprehensive one- and two-dimensional nuclear magnetic resonance and high-resolution mass spectrometry. The relative and absolute configuration of the entire molecule were determined using a combined approach, involving chromatographic analysis by liquid chromatography-mass spectrometry, advanced Marfey's method, and total synthesis. Micromonosporamide A exhibited glutamine-dependent antiproliferative activity.
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Affiliation(s)
- Toshifumi Takeuchi
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Masaki Hatano
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Hideyuki Muramatsu
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Yumiko Kubota
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Ryuichi Sawa
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Masayuki Igarashi
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
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3
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Satam N, Basu P, Pati S, Namboothiri INN. Michael Addition‐Elimination and [4+1] Annulation of Sulfonylphthalide with Hydroxychalcones for the Synthesis of Alkylidenephthalides and Indanediones. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Nishikant Satam
- Department of Chemistry Indian Institute of Technology Bombay Mumbai 400076 India
| | - Pallabita Basu
- Department of Chemistry Indian Institute of Technology Bombay Mumbai 400076 India
| | - Soumyaranjan Pati
- Department of Chemistry Indian Institute of Technology Bombay Mumbai 400076 India
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4
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Satham L, Suresh A, Namboothiri INN. Synthesis of Sulfonyloxindoles via Functional Group Exchange Between 3‐Sulfonylphthalide and Isatylidenemalononitrile. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100148] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Alati Suresh
- Department of Chemistry Indian Institute of Technology Bombay Mumbai 400 076 India
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5
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Narala SG, Nagalatha G, Venkat Narsaiah A. Stereoselective total synthesis of C 2-symmetric natural products pyrenophorol and its derivatives. Nat Prod Res 2020; 34:2173-2178. [PMID: 30822134 DOI: 10.1080/14786419.2019.1577843] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A stereoselective total synthesis of 16-membered C2-symmetric macrodiolide Pyrenophorol, Tetrahydropyrenophorol and 4,4-diacetylpyrenophorol have been accomplished. The synthesis started from commercially available L-Aspartic acid and the key reactions involved are regioselective epoxide opening, CBS reduction, Pinnick oxidation and Mitsunobu dilactonization.
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Affiliation(s)
- Siva Ganesh Narala
- Organic Synthesis Laboratory, Fluoro-Agrochemicals Department, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - G Nagalatha
- Organic Synthesis Laboratory, Fluoro-Agrochemicals Department, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - A Venkat Narsaiah
- Organic Synthesis Laboratory, Fluoro-Agrochemicals Department, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, India
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6
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Kraus GA, Wang S. Annulations with Butenolides and Phthalides: New Entries to Isocoumarins, 3,4-Dihydroisocoumarins, and Benzofurans. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The reactions of the anions of butenolides and substituted phthalides with sorbate esters and mono-epoxy sorbate esters furnish isocoumarins, 3,4-dihydroisocoumarins, and benzofurans. The yields range from 41% to 71%.
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7
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Basu P, Satam N, Namboothiri INN. Synthesis of indenofurans, benzofurans and spiro-lactones via Hauser–Kraus annulation involving 1,6-addition of phthalide to quinone methides. Org Biomol Chem 2020; 18:5677-5687. [DOI: 10.1039/d0ob01115k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Base mediated 1,6-addition–Dieckmann cyclization of phthalide with quinone methide leads to oxygen heterocycles such as indenofurans, spiro-lactones and benzofurans through a cascade of rearrangements involving multiple ring opening and ring closure.
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Affiliation(s)
- Pallabita Basu
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Nishikant Satam
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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8
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Awasthi A, Singh M, Rathee G, Chandra R. Recent advancements in synthetic methodologies of 3-substituted phthalides and their application in the total synthesis of biologically active natural products. RSC Adv 2020; 10:12626-12652. [PMID: 35497626 PMCID: PMC9051324 DOI: 10.1039/d0ra00701c] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/06/2020] [Indexed: 01/19/2023] Open
Abstract
We have provided a critical review that focuses on key developments in the area of 3-substituted phthalides and their role in the development of important biologically active natural products. 3-Substituted phthalides are vital molecules owing to their fascinating biological activity. The scope, isolation, and characterization of various naturally occurring racemic and chiral 3-substituted phthalides have been covered. We have put significant emphasis on recently developed research methodologies for the synthesis of racemic and chiral 3-substituted phthalides. These newer approaches are essential for the development of newer and elegant strategies for the synthesis of phthalide-based or similar molecular architecture with broader substrate scope and higher stereoselectivities. Also, we have discussed the application of 3-substituted phthalides as a precursor for the synthesis of natural products and their analogs. We have provided contextual information on the chemistry of 3-substituted phthalides and their significance in natural product synthesis.![]()
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Affiliation(s)
- Amardeep Awasthi
- Drug Discovery and Development Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Mandeep Singh
- Drug Discovery and Development Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Garima Rathee
- Drug Discovery and Development Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Ramesh Chandra
- Drug Discovery and Development Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
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9
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Chupakhin E, Babich O, Prosekov A, Asyakina L, Krasavin M. Spirocyclic Motifs in Natural Products. Molecules 2019; 24:E4165. [PMID: 31744211 PMCID: PMC6891393 DOI: 10.3390/molecules24224165] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 11/03/2019] [Accepted: 11/12/2019] [Indexed: 02/07/2023] Open
Abstract
Spirocyclic motifs are emerging privileged structures for drug discovery. They are also omnipresent in the natural products domain. However, until today, no attempt to analyze the structural diversity of various spirocyclic motifs occurring in natural products and their relative populations with unique compounds reported in the literature has been undertaken. This review aims to fill that void and analyze the diversity of structurally unique natural products containing spirocyclic moieties of various sizes.
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Affiliation(s)
- Evgeny Chupakhin
- Immanuel Kant Baltic Federal University, 236016 Kaliningrad, Alexandra Nevskogo 14, Russia; (E.C.); (O.B.)
| | - Olga Babich
- Immanuel Kant Baltic Federal University, 236016 Kaliningrad, Alexandra Nevskogo 14, Russia; (E.C.); (O.B.)
- Kemerovo State University, 650000 Krasnaya, Kemerovo, Russia; (A.P.); (L.A.)
| | - Alexander Prosekov
- Kemerovo State University, 650000 Krasnaya, Kemerovo, Russia; (A.P.); (L.A.)
| | - Lyudmila Asyakina
- Kemerovo State University, 650000 Krasnaya, Kemerovo, Russia; (A.P.); (L.A.)
| | - Mikhail Krasavin
- Immanuel Kant Baltic Federal University, 236016 Kaliningrad, Alexandra Nevskogo 14, Russia; (E.C.); (O.B.)
- Saint Petersburg State University, 199034 Saint Petersburg, Russia
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10
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Zhang Y, Ye Q, Ponomareva LV, Cao Y, Liu Y, Cui Z, Van Lanen SG, Voss SR, She QB, Thorson JS. Total synthesis of griseusins and elucidation of the griseusin mechanism of action. Chem Sci 2019; 10:7641-7648. [PMID: 31583069 PMCID: PMC6755659 DOI: 10.1039/c9sc02289a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 06/26/2019] [Indexed: 12/15/2022] Open
Abstract
An efficient divergent synthesis of griseusins enabled SAR studies, mechanistic elucidation and evaluation in an axolotl tail regeneration model.
A divergent modular strategy for the enantioselective total synthesis of 12 naturally-occurring griseusin type pyranonaphthoquinones and 8 structurally-similar analogues is described. Key synthetic highlights include Cu-catalyzed enantioselective boration–hydroxylation and hydroxyl-directed C–H olefination to afford the central pharmacophore followed by epoxidation–cyclization and maturation via diastereoselective reduction and regioselective acetylation. Structural revision of griseusin D and absolute structural assignment of 2a,8a-epoxy-epi-4′-deacetyl griseusin B are also reported. Subsequent mechanistic studies establish, for the first time, griseusins as potent inhibitors of peroxiredoxin 1 (Prx1) and glutaredoxin 3 (Grx3). Biological evaluation, including comparative cancer cell line cytotoxicity and axolotl embryo tail inhibition studies, highlights the potential of griseusins as potent molecular probes and/or early stage leads in cancer and regenerative biology.
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Affiliation(s)
- Yinan Zhang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine , School of Pharmacy , Nanjing University of Chinese Medicine , Nanjing , Jiangsu 210023 , China.,Center for Pharmaceutical Research and Innovation , University of Kentucky , Lexington , KY 40536 , USA.,College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - Qing Ye
- Markey Cancer Center , Department of Pharmacology and Nutritional Sciences , College of Medicine , University of Kentucky , Lexington , KY 40536 , USA .
| | - Larissa V Ponomareva
- Center for Pharmaceutical Research and Innovation , University of Kentucky , Lexington , KY 40536 , USA.,College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - Yanan Cao
- Markey Cancer Center , Department of Pharmacology and Nutritional Sciences , College of Medicine , University of Kentucky , Lexington , KY 40536 , USA .
| | - Yang Liu
- Center for Pharmaceutical Research and Innovation , University of Kentucky , Lexington , KY 40536 , USA.,College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - Zheng Cui
- College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - Steven G Van Lanen
- College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - S Randal Voss
- Department of Neuroscience , Spinal Cord and Brain Injury Research Center , Ambystoma Genetic Stock Center , University of Kentucky , Lexington , KY 40536 , USA
| | - Qing-Bai She
- Markey Cancer Center , Department of Pharmacology and Nutritional Sciences , College of Medicine , University of Kentucky , Lexington , KY 40536 , USA .
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation , University of Kentucky , Lexington , KY 40536 , USA.,College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
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11
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Suresh A, Baiju TV, Kumar T, Namboothiri INN. Synthesis of Spiro- and Fused Heterocycles via (4+4) Annulation of Sulfonylphthalide with o-Hydroxystyrenyl Derivatives. J Org Chem 2019; 84:3158-3168. [PMID: 30776237 DOI: 10.1021/acs.joc.8b03039] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An expedient one-pot protocol for the synthesis of functionalized benzofuran containing fused and spiro-heterocycles has been accomplished by the modified Hauser-Kraus (HK) annulation of sulfonylphthalide with o-hydroxychalcones and o-hydroxynitrostyrylisoxazoles. The multicascade process involves Michael addition, Dieckmann cyclization, and a series of cyclizations, eliminations, and rearrangements to deliver the fused and spiro-heterocyclic products. An unusual transformation of fused indenofuran to naphthoquinone, the classical HK adduct, unraveled a novel pathway for the synthesis unsymmetrical naphthoquinones.
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Affiliation(s)
- Alati Suresh
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai , 400076 , India
| | - Thekke V Baiju
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai , 400076 , India
| | - Tarun Kumar
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai , 400076 , India
| | - Irishi N N Namboothiri
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai , 400076 , India
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12
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Sivasankara C, Satham L, Namboothiri INN. One-Pot Construction of Functionalized Spiro-dihydronaphthoquinone-oxindoles via Hauser–Kraus Annulation of Sulfonylphthalide with 3-Alkylideneoxindoles. J Org Chem 2017; 82:12939-12944. [DOI: 10.1021/acs.joc.7b02656] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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13
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Lokesh K, Kesavan V. Efficient Synthesis of Highly Functionalized Spirocarbocyclic Oxindoles through Hauser Annulation. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Kanduru Lokesh
- Chemical Biology Laboratory; Department of Biotechnology; Bhupat and Jyoti Mehta School of Biosciences; Indian Institute of Technology Madras; 600036 Chennai India
| | - Venkitasamy Kesavan
- Chemical Biology Laboratory; Department of Biotechnology; Bhupat and Jyoti Mehta School of Biosciences; Indian Institute of Technology Madras; 600036 Chennai India
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14
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Kumar T, Mane V, Namboothiri INN. Synthesis of Aminophenanthrenes and Benzoquinolines via Hauser–Kraus Annulation of Sulfonyl Phthalide with Rauhut–Currier Adducts of Nitroalkenes. Org Lett 2017; 19:4283-4286. [DOI: 10.1021/acs.orglett.7b01924] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tarun Kumar
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India
| | - Vaijinath Mane
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India
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15
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Naysmith BJ, Hume PA, Sperry J, Brimble MA. Pyranonaphthoquinones - isolation, biology and synthesis: an update. Nat Prod Rep 2017; 34:25-61. [PMID: 27759131 DOI: 10.1039/c6np00080k] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: 2008 to 2015. A review on the isolation, biological activity and synthesis of pyranonaphthoquinone natural products from 2008-2015 is providedThis review discusses the isolation, biological activity and synthesis of pyranonaphthoquinone natural products, covering the years 2008-2015. The pyranonaphthoquinones are a group of metabolites sharing a common naphtho[2,3-c]pyran-5,10-dione ring system that have been isolated from a wide range of microorganisms, plants and insects. In addition to their synthetically challenging molecular structures, pyranonaphthoquinones exhibit a wide array of biological activity, including anti-bacterial, anti-fungal and anti-cancer properties. The therapeutic potential of these compounds has led to a dynamic interplay between total synthesis and biological evaluation.
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Affiliation(s)
- Briar J Naysmith
- School of Chemical Sciences, Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Paul A Hume
- School of Chemical Sciences, Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Jonathan Sperry
- School of Chemical Sciences, Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Margaret A Brimble
- School of Chemical Sciences, Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
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16
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Chaturvedi AK, Kant R, Rastogi N. Access to the Phosphorylindenopyrazole Scaffold via a Metal-Free Domino Reaction of Diazoalkylphosphonates with 3-Bromophthalides. J Org Chem 2016; 81:11291-11296. [DOI: 10.1021/acs.joc.6b02267] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Namrata Rastogi
- Academy of Scientific and Innovative Research, New Delhi 110001, India
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17
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Kumar T, Satam N, Namboothiri INN. Hauser-Kraus Annulation of Phthalides with Nitroalkenes for the Synthesis of Fused and Spiro Heterocycles. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600390] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tarun Kumar
- Department of Chemistry; Indian Institute of Technology; 400 076 Bombay Mumbai India
| | - Nishikant Satam
- Department of Chemistry; Indian Institute of Technology; 400 076 Bombay Mumbai India
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18
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Roy J, Mal T, Jana S, Mal D. Regiodefined synthesis of brominated hydroxyanthraquinones related to proisocrinins. Beilstein J Org Chem 2016; 12:531-6. [PMID: 27340445 PMCID: PMC4901998 DOI: 10.3762/bjoc.12.52] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 02/26/2016] [Indexed: 11/23/2022] Open
Abstract
Dibromobenzoisofuranone 12, synthesized in six steps, was regiospecifically annulated with 5-substituted cyclohexenones 13/36 in the presence of LiOt-Bu to give brominated anthraquinones 14/38 in good yields. Darzens condensation of 30 was shown to give chain-elongated anthraquinone 32. Alkaline hydrolysis of 38 furnished 39 representing desulfoproisocrinin F.
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Affiliation(s)
- Joyeeta Roy
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| | - Tanushree Mal
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| | - Supriti Jana
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| | - Dipakranjan Mal
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
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19
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Spaniol JM, Wheeler KA. Accessing Centnerszwer's quasiracemate – molecular shape controlled molecular recognition. RSC Adv 2016. [DOI: 10.1039/c6ra08131b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Reinvestigation of M. Centnerszwer's 1899 quasiracemate using tailor-made additives offers important insight to molecular shape directed supramolecular assemblies.
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20
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Elshahawi SI, Shaaban KA, Kharel MK, Thorson JS. A comprehensive review of glycosylated bacterial natural products. Chem Soc Rev 2015; 44:7591-697. [PMID: 25735878 PMCID: PMC4560691 DOI: 10.1039/c4cs00426d] [Citation(s) in RCA: 299] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A systematic analysis of all naturally-occurring glycosylated bacterial secondary metabolites reported in the scientific literature up through early 2013 is presented. This comprehensive analysis of 15 940 bacterial natural products revealed 3426 glycosides containing 344 distinct appended carbohydrates and highlights a range of unique opportunities for future biosynthetic study and glycodiversification efforts.
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Affiliation(s)
- Sherif I Elshahawi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA. and Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA. and Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Madan K Kharel
- School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, Maryland, USA
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA. and Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
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21
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Zhang Y, Ye Q, Wang X, She QB, Thorson JS. A divergent enantioselective strategy for the synthesis of griseusins. Angew Chem Int Ed Engl 2015; 54:11219-22. [PMID: 26230189 PMCID: PMC4565752 DOI: 10.1002/anie.201505022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 06/24/2015] [Indexed: 12/12/2022]
Abstract
The first enantioselective total synthesis of griseusin A, griseusin C, 4'-deacetyl-griseusin A, and two non-native counterparts in 11-14 steps is reported. This strategy highlights a key hydroxy-directed CH olefination of 1-methylene isochroman with an α,β-unsaturated ketone followed by subsequent stereoselective epoxidation and regioselective cyclization to afford the signature tetrahydro-spiropyran ring. Colorectal cancer cell cytotoxicities of the final products highlight the impact of the griseusin tetrahydro-spiropyran ring on bioactivity. As the first divergent enantioselective synthesis, the strategy put forth sets the stage for further griseusin mechanism-of-action and SAR studies.
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Affiliation(s)
- Yinan Zhang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY 40536 (USA)
| | - Qing Ye
- Markey Cancer Center, University of Kentucky, 741 South Limestone Street, Lexington, KY 40536 (USA)
| | - Xiachang Wang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY 40536 (USA)
| | - Qing-Bai She
- Markey Cancer Center, University of Kentucky, 741 South Limestone Street, Lexington, KY 40536 (USA)
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY 40536 (USA).
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22
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Hassan NP, Naysmith BJ, Sperry J, Brimble MA. Formal synthesis of nanaomycin D via a Hauser–Kraus annulation using a chiral enone-lactone. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.09.014] [Citation(s) in RCA: 15] [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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23
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Zhang Y, Ye Q, Wang X, She QB, Thorson JS. A Divergent Enantioselective Strategy for the Synthesis of Griseusins. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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24
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Brimble MA, Hassan NPS, Naysmith BJ, Sperry J. Toward an Asymmetric Synthesis of the Dimeric Pyranonaphthoquinone Antibiotic Crisamicin A. J Org Chem 2014; 79:7169-78. [DOI: 10.1021/jo501344c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Margaret A. Brimble
- School
of Chemical Sciences, The University of Auckland, 23 Symonds
Street, Auckland 1010, New Zealand
- Maurice
Wilkins Centre for Molecular Biodiscovery, c/o School of Biological
Sciences, The University of Auckland, Private Bag 92019, Auckland 1010, New Zealand
| | - Najmah P. S. Hassan
- School
of Chemical Sciences, The University of Auckland, 23 Symonds
Street, Auckland 1010, New Zealand
- Maurice
Wilkins Centre for Molecular Biodiscovery, c/o School of Biological
Sciences, The University of Auckland, Private Bag 92019, Auckland 1010, New Zealand
| | - Briar J. Naysmith
- School
of Chemical Sciences, The University of Auckland, 23 Symonds
Street, Auckland 1010, New Zealand
| | - Jonathan Sperry
- Maurice
Wilkins Centre for Molecular Biodiscovery, c/o School of Biological
Sciences, The University of Auckland, Private Bag 92019, Auckland 1010, New Zealand
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25
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One-Pot Synthesis of Spirooxazino DerivativesviaEnzyme- Initiated Multicomponent Reactions. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300965] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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26
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Naysmith BJ, Furkert D, Brimble MA. Synthesis of highly substituted pyranonaphthalene spiroketals related to the griseusins using a Hauser–Kraus annulation strategy. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.12.066] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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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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28
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Lu H, Zhang FM, Pan JL, Chen T, Li YF. NH4HF2 as a Selective TBS-Removal Reagent for the Synthesis of Highly Functionalized Spiroketal via Tandem Deprotection/Spiroketalization Procedure. J Org Chem 2013; 79:546-58. [DOI: 10.1021/jo402167q] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hui Lu
- State Key
Laboratory of Applied
Organic Chemistry and Department of Chemistry Lanzhou University, Lanzhou 730000, P. R. China
| | - Fu-Min Zhang
- State Key
Laboratory of Applied
Organic Chemistry and Department of Chemistry Lanzhou University, Lanzhou 730000, P. R. China
| | - Jin-Long Pan
- State Key
Laboratory of Applied
Organic Chemistry and Department of Chemistry Lanzhou University, Lanzhou 730000, P. R. China
| | - Tao Chen
- State Key
Laboratory of Applied
Organic Chemistry and Department of Chemistry Lanzhou University, Lanzhou 730000, P. R. China
| | - Yi-Fan Li
- State Key
Laboratory of Applied
Organic Chemistry and Department of Chemistry Lanzhou University, Lanzhou 730000, P. R. China
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