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Seipp K, Grölz V, Glass H, Quraishi E, Vierengel N, Opatz T. Total Synthesis of (±)-Oxacyclododecindione. J Org Chem 2024; 89:5746-5763. [PMID: 38597924 DOI: 10.1021/acs.joc.4c00333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Racemic total synthesis of the natural product oxacyclododecindione, isolated in 2008 as the first member of the oxacyclododecindione family, is reported. Studies toward this molecule commenced with a biomimetic late-stage C-H oxidation starting from 14-deoxyoxacyclododecindione as a known precursor. This provided insights into the reactivity of the macrolactone class but did not permit the synthesis of the target natural product. Based on these results, a synthetic strategy through intramolecular Friedel-Crafts acylation combined with Barton decarboxylation to introduce the tertiary alcohol, a major challenge in previous synthetic efforts, was envisioned. This resulted in an 11-step racemic total synthesis of (±)-oxacyclododecindione, renowned for its potent anti-inflammatory and antifibrotic activities.
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Affiliation(s)
- Kevin Seipp
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Vincent Grölz
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Hagen Glass
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Elisabeth Quraishi
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Nina Vierengel
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Till Opatz
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
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2
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Larghi EL, Bracca ABJ, Simonetti SO, Kaufman TS. Recent developments in the total synthesis of natural products using the Ugi multicomponent reactions as the key strategy. Org Biomol Chem 2024; 22:429-465. [PMID: 38126459 DOI: 10.1039/d3ob01837g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
The total syntheses of selected natural products using different versions of the Ugi multicomponent reaction is reviewed on a case-by-case basis. The revision covers the period 2008-2023 and includes detailed descriptions of the synthetic sequences, the use of state-of-the-art chemical reagents and strategies, as well as the advantages and limitations of the transformation and some remedial solutions. Relevant data on the isolation and bioactivity of the different natural targets are also briefly provided. The examples clearly evidence the strategic importance of this transformation and its key role in the modern natural products synthetic chemistry toolbox. This methodology proved to be a valuable means for easily building molecular complexity and efficiently delivering step-economic syntheses even of intricate structures, with a promising future.
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Affiliation(s)
- Enrique L Larghi
- Instituto de Química Rosario (IQUIR, CONICET-UNR) and Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario, Suipacha 531 (2000), Rosario, Argentina.
| | - Andrea B J Bracca
- Instituto de Química Rosario (IQUIR, CONICET-UNR) and Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario, Suipacha 531 (2000), Rosario, Argentina.
| | - Sebastián O Simonetti
- Instituto de Química Rosario (IQUIR, CONICET-UNR) and Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario, Suipacha 531 (2000), Rosario, Argentina.
| | - Teodoro S Kaufman
- Instituto de Química Rosario (IQUIR, CONICET-UNR) and Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario, Suipacha 531 (2000), Rosario, Argentina.
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3
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Lindner H, Amberg WM, Carreira EM. Iron-Mediated Photochemical Anti-Markovnikov Hydroazidation of Unactivated Olefins. J Am Chem Soc 2023; 145:22347-22353. [PMID: 37811819 PMCID: PMC10591317 DOI: 10.1021/jacs.3c09122] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Indexed: 10/10/2023]
Abstract
Unactivated olefins are converted to alkyl azides with bench-stable NaN3 in the presence of FeCl3·6H2O under blue-light irradiation. The products are obtained with anti-Markovnikov selectivity, and the reaction can be performed under mild ambient conditions in the presence of air and moisture. The transformation displays broad functional group tolerance, which renders it suitable for functionalization of complex molecules. Mechanistic investigations are conducted to provide insight into the hydroazidation reaction and reveal the role of water from the iron hydrate as the H atom source.
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Affiliation(s)
- Henry Lindner
- Department of Chemistry and
Applied Biosciences, Laboratory of Organic Chemistry, ETH Zürich, 8093 Zurich, Switzerland
| | - Willi M. Amberg
- Department of Chemistry and
Applied Biosciences, Laboratory of Organic Chemistry, ETH Zürich, 8093 Zurich, Switzerland
| | - Erick M. Carreira
- Department of Chemistry and
Applied Biosciences, Laboratory of Organic Chemistry, ETH Zürich, 8093 Zurich, Switzerland
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4
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Xiong W, Shi Q, Liu WH. Simple and Practical Conversion of Benzoic Acids to Phenols at Room Temperature. J Am Chem Soc 2022; 144:15894-15902. [PMID: 35997485 DOI: 10.1021/jacs.2c07529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Phenols are important organic molecules because they have found widespread applications in many fields. Herein, an efficient and practical approach to prepare phenols from benzoic acids via simple organic reagents at room temperature is reported. This approach is compatible with various functional groups and heterocycles and can be easily scaled up. To demonstrate its synthetic utility, bioactive molecules and unsymmetrical hexaarylbenzenes have been prepared by leveraging this transformation as strategic steps. Mechanistic investigations suggest that the key migration step involves a free carbocation instead of a radical intermediate. Considering the abundance of benzoic acids and the utility of phenols, it is anticipated that this method will find broad applications in organic synthesis.
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Affiliation(s)
- Wenzhang Xiong
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
| | - Qiu Shi
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
| | - Wenbo H Liu
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
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Marine Heterocyclic Compounds That Modulate Intracellular Calcium Signals: Chemistry and Synthesis Approaches. Mar Drugs 2021; 19:md19020078. [PMID: 33572583 PMCID: PMC7911796 DOI: 10.3390/md19020078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/26/2021] [Accepted: 01/28/2021] [Indexed: 11/21/2022] Open
Abstract
Intracellular Ca2+ plays a pivotal role in the control of a large series of cell functions in all types of cells, from neurotransmitter release and muscle contraction to gene expression, cell proliferation and cell death. Ca2+ is transported through specific channels and transporters in the plasma membrane and subcellular organelles such as the endoplasmic reticulum and mitochondria. Therefore, dysregulation of intracellular Ca2+ homeostasis may lead to cell dysfunction and disease. Accordingly, chemical compounds from natural origin and/or synthesis targeting directly or indirectly these channels and proteins may be of interest for the treatment of cell dysfunction and disease. In this review, we show an overview of a group of marine drugs that, from the structural point of view, contain one or various heterocyclic units in their core structure, and from the biological side, they have a direct influence on the transport of calcium in the cell. The marine compounds covered in this review are divided into three groups, which correspond with their direct biological activity, such as compounds with a direct influence in the calcium channel, compounds with a direct effect on the cytoskeleton and drugs with an effect on cancer cell proliferation. For each target, we describe its bioactive properties and synthetic approaches. The wide variety of chemical structures compiled in this review and their significant medical properties may attract the attention of many different researchers.
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7
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Ma Z, You L, Chen C. Stereocontrolled Formation of a [4.4]Heterospiro Ring System with Unexpected Inversion of Configuration at the Spirocenter. J Org Chem 2017; 82:731-736. [PMID: 27933858 PMCID: PMC5527678 DOI: 10.1021/acs.joc.6b02266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Stereoselective construction of the 1,3-diazaspiro[4.4]nonane core skeleton of massadine and related dimeric pyrrole-imidazole alkaloids is a synthetic challenge. We describe herein the synthesis of all C13/14 diastereomers of this spiro molecule through controlled oxidation and epimerization of the C13 spirocenter under mild acidic conditions.
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Affiliation(s)
| | - Lin You
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
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8
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Lindel T. Chemistry and Biology of the Pyrrole–Imidazole Alkaloids. THE ALKALOIDS: CHEMISTRY AND BIOLOGY 2017; 77:117-219. [DOI: 10.1016/bs.alkal.2016.12.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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9
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Song HT, Ding W, Zhou QQ, Liu J, Lu LQ, Xiao WJ. Photocatalytic Decarboxylative Hydroxylation of Carboxylic Acids Driven by Visible Light and Using Molecular Oxygen. J Org Chem 2016; 81:7250-5. [DOI: 10.1021/acs.joc.6b01360] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Hai-Tao Song
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Wei Ding
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Quan-Quan Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Jing Liu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Liang-Qiu Lu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Wen-Jing Xiao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
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10
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Ma Z, Wang X, Ma Y, Chen C. Asymmetric Synthesis of Axinellamines A and B. Angew Chem Int Ed Engl 2016; 55:4763-6. [PMID: 27037993 PMCID: PMC4836294 DOI: 10.1002/anie.201600007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Revised: 02/05/2016] [Indexed: 11/10/2022]
Abstract
Axinellamines A and B are broad-spectrum antibacterial pyrrole-imidazole alkaloids that have a complex polycyclic skeleton. A new asymmetric synthesis of these marine sponge metabolites is described herein, featuring an oxidative rearrangement and an anchimeric chlorination reaction.
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Affiliation(s)
- Zhiqiang Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Xiao Wang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
- Department of Chemistry and Biochemistry, The University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Yuyong Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
- Department of Chemistry and Biochemistry, The University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA.
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11
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Affiliation(s)
- Zhiqiang Ma
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
| | - Xiao Wang
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
- Department of Chemistry and Biochemistry The University of California, San Diego 9500 Gilman Drive La Jolla CA 92093 USA
| | - Yuyong Ma
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
- Department of Chemistry and Biochemistry The University of California, San Diego 9500 Gilman Drive La Jolla CA 92093 USA
| | - Chuo Chen
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
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12
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Abstract
The carbocyclic core of massadine has been synthesized relying on a stereoselective formal [3 + 2] cycloaddition of lithiumtrimethylsilyldiazomethane with α,β-unsaturated esters to form a Δ(2)-pyrazoline moiety followed by facile N-N bond cleavage. A unique feature of the current approach is the direct installation of the tertiary α-amino center and a β-cyano group in a cis arrangement on the resulting cyclopentane framework via a previously developed formal aminocyanation protocol.
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Affiliation(s)
- Chunrui Sun
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Hyunjin Lee
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Daesung Lee
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
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13
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Allen SK, Lathrop TE, Patel SB, Harrell Moody DM, Sommer RD, Coombs TC. Synthesis of 7-norbornenols via Diels–Alder cycloadditions of cyclopentadienol generated by decomposition of ferrocenium cation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.051] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Moriyama K, Sugiue T, Nishinohara C, Togo H. Divergent Synthesis of α,γ-Disubstituted γ-Butyrolactones through Diastereoselective Bromolactonization with Alkali Metal Bromide: Asymmetric Total Synthesis of (+)-Dubiusamine C. J Org Chem 2015; 80:9132-40. [PMID: 26313874 DOI: 10.1021/acs.joc.5b01497] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A divergent synthesis of α-substituted bromomethyl γ-lactones was developed, which involves the diastereoselective bromolactonization of α-substituted 4-pentenoic acids and 4-pentenamides via umpolung of bromide by use of alkali metal bromide and Oxone (potassium peroxymonosulfate mixture, 2KHSO5·KHSO4·K2SO4) to obtain mainly cis-products from α-substituted 4-pentenoic acids and trans-products from α-substituted 4-pentenamides, and it was found that the bromonium species generated from KBr and Oxone had higher activity than N-bromosuccinimide. Furthermore, the asymmetric total synthesis of (+)-dubiusamine C, which was isolated as a minor diastereomer from Pandanus dubius, was accomplished for the first time through the cis-selective bromolactonization of (S)-α-methyl-4-pentenoic acid in nine linear steps and 36% overall yield.
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Affiliation(s)
- Katsuhiko Moriyama
- Department of Chemistry, Graduate School of Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Toru Sugiue
- Department of Chemistry, Graduate School of Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Chihiro Nishinohara
- Department of Chemistry, Graduate School of Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Hideo Togo
- Department of Chemistry, Graduate School of Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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15
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Wang X, Gao Y, Ma Z, Rodriguez RA, Yu ZX, Chen C. Syntheses of Sceptrins and Nakamuric Acid and Insights into the Biosyntheses of Pyrrole-Imidazole Dimers. Org Chem Front 2015; 2:978-984. [PMID: 26328059 PMCID: PMC4551504 DOI: 10.1039/c5qo00165j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sceptrins and nakamuric acid are structurally unique antibiotics isolated from marine sponges. Recent studies suggest that the biosynthesis of these dimeric pyrrole-imidazole alkaloids involves a single-electron transfer (SET)-promoted [2+2] cycloaddition to form their cyclobutane core skeletons. We describe herein the biomimetic syntheses of racemic sceptrin and nakamuric acid. We also report the asymmetric syntheses of sceptrin, bromosceptrin, and dibromosceptrin in their natural enantiomeric form. We further provide mechanistic insights into the pathway selectivity of the SET-promoted [2+2] and [4+2] cycloadditions that lead to the divergent formation of the sceptrin and ageliferin core skeletons. Both the [2+2] and [4+2] cycloadditions are stepwise reactions, with the [2+2] pathway kinetically and thermodynamically favored over the [4+2] pathway. For the [2+2] cycloaddition, the dimerization of pyrrole-imidazole monomers is rate-limiting, whereas for the [4+2] cycloaddition, the cyclization is the slowest step.
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Affiliation(s)
- Xiaolei Wang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yang Gao
- College of Chemistry, Peking University, Beijing 100871, China ; Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, China
| | - Zhiqiang Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Rodrigo A Rodriguez
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Zhi-Xiang Yu
- College of Chemistry, Peking University, Beijing 100871, China
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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16
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Abstract
Naturally occurring guanidine derivatives frequently display medicinally useful properties. Among them, the higher order pyrrole-imidazole alkaloids, the dragmacidins, the crambescidins/batzelladines, and the saxitoxins/tetradotoxins have stimulated the development of many new synthetic methods over the past decades. We provide here an overview of the syntheses of these cyclic guanidine-containing natural products.
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Affiliation(s)
- Yuyong Ma
- Division of Chemistry, Department of Biochemistry, U T Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
| | - Saptarshi De
- Division of Chemistry, Department of Biochemistry, U T Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
| | - Chuo Chen
- Division of Chemistry, Department of Biochemistry, U T Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
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Abstract
Covering: 2009 to 2013. This review covers the 188 novel marine natural products described since 2008, from deep-water (50->5000 m) marine fauna including bryozoa, chordata, cnidaria, echinodermata, microorganisms, mollusca and porifera. The structures of the new compounds and details of the source organism, depth of collection and country of origin are presented, along with any relevant biological activities of the metabolites. Where reported, synthetic studies on the deep-sea natural products have also been included. Most strikingly, 75% of the compounds were reported to possess bioactivity, with almost half exhibiting low micromolar cytotoxicity towards a range of human cancer cell lines, along with a significant increase in the number of microbial deep-sea natural products reported.
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Affiliation(s)
- Danielle Skropeta
- School of Chemistry, University of Wollongong, Wollongong, NSW 2500, Australia
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18
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Wang X, Ma Z, Wang X, De S, Ma Y, Chen C. Dimeric pyrrole-imidazole alkaloids: synthetic approaches and biosynthetic hypotheses. Chem Commun (Camb) 2014; 50:8628-39. [PMID: 24828265 PMCID: PMC4096073 DOI: 10.1039/c4cc02290d] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The pyrrole-imidazole alkaloids are a group of structurally unique and biologically interesting marine sponge metabolites. Among them, the cyclic dimers have caught synthetic chemists' attention particularly. Numerous synthetic strategies have been developed and various biosynthetic hypotheses have been proposed for these fascinating natural products. We discuss herein the synthetic approaches and the biosynthetic insights obtained from these studies.
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Affiliation(s)
- Xiao Wang
- Division of Chemistry, Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA.
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Kreye O, Trefzger C, Sehlinger A, Meier MAR. Multicomponent Reactions with a Convertible Isocyanide: Efficient and Versatile Grafting of ADMET-Derived Polymers. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400187] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Oliver Kreye
- Karlsruhe Institute of Technology, Institute of Organic Chemistry; Laboratory of Applied Chemistry; Fritz-Haber-Weg 6, Building 30.42 D-76131 Karlsruhe Germany
| | - Carsten Trefzger
- Karlsruhe Institute of Technology, Institute of Organic Chemistry; Laboratory of Applied Chemistry; Fritz-Haber-Weg 6, Building 30.42 D-76131 Karlsruhe Germany
| | - Ansgar Sehlinger
- Karlsruhe Institute of Technology, Institute of Organic Chemistry; Laboratory of Applied Chemistry; Fritz-Haber-Weg 6, Building 30.42 D-76131 Karlsruhe Germany
| | - Michael A. R. Meier
- Karlsruhe Institute of Technology, Institute of Organic Chemistry; Laboratory of Applied Chemistry; Fritz-Haber-Weg 6, Building 30.42 D-76131 Karlsruhe Germany
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20
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Abstract
Review of deep-sea natural products covering the five-year period 2009–2013.
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Affiliation(s)
| | - Liangqian Wei
- Centre of Medicinal Chemistry
- University of Wollongong
- Wollongong, Australia
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21
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Malakhov MV, Dubinnyi MA, Vlasova NV, Zgoda VG, Efremov RG, Boldyrev IA. End-group differentiating ozonolysis of furocoumarins. RSC Adv 2014. [DOI: 10.1039/c4ra08106d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ozonolysis of furocoumarins followed by reductive work-up yields not only common symmetrical dialdehydes, but also o-formylumbelliferones with moderate-to-high yields.
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Affiliation(s)
| | - Maxim A. Dubinnyi
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences
- Moscow 117997, Russia
| | - Natalia V. Vlasova
- Pirogov Russian National Research Medical University
- Moscow 117997, Russia
| | - Victor G. Zgoda
- Orekhovich Institute of Biomedical Chemistry of the Russian Academy of Medical Sciences
- Moscow 119121, Russia
| | - Roman G. Efremov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences
- Moscow 117997, Russia
| | - Ivan A. Boldyrev
- Pirogov Russian National Research Medical University
- Moscow 117997, Russia
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences
- Moscow 117997, Russia
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22
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Testero SA, Mangione MI, Suárez AG, Spanevello RA. End-Group-Differentiating Ozonolysis of Norbornene Systems To Afford Highly Substituted Cyclopentane Rings. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300384] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Lewis Acid Catalyzed Site-Selective Cycloadditions of 2,6-Diazasemibullvalenes with Isocyanides, Azides, and Diazo Compounds for the Synthesis of Diaza- and Triazabrexadiene Derivatives. Angew Chem Int Ed Engl 2013; 52:3485-9. [DOI: 10.1002/anie.201210126] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Indexed: 11/07/2022]
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24
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Zhang S, Zhang WX, Xi Z. Lewis Acid Catalyzed Site-Selective Cycloadditions of 2,6-Diazasemibullvalenes with Isocyanides, Azides, and Diazo Compounds for the Synthesis of Diaza- and Triazabrexadiene Derivatives. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201210126] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Wang X, Wang X, Tan X, Lu J, Cormier KW, Ma Z, Chen C. A biomimetic route for construction of the [4+2] and [3+2] core skeletons of dimeric pyrrole-imidazole alkaloids and asymmetric synthesis of ageliferins. J Am Chem Soc 2012; 134:18834-42. [PMID: 23072663 DOI: 10.1021/ja309172t] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The pyrrole-imidazole alkaloids have fascinated chemists for decades because of their unique structures. The high nitrogen and halogen contents and the densely functionalized skeletons make their laboratory synthesis challenging. We describe herein an oxidative method for accessing the core skeletons of two classes of pyrrole-imidazole dimers. This synthetic strategy was inspired by the putative biosynthesis pathways and its development was facilitated by computational studies. Using this method, we have successfully prepared ageliferin, bromoageliferin, and dibromoageliferin in their natural enantiomeric form.
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Affiliation(s)
- Xiao Wang
- Division of Chemistry, Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, 75390-9038, United States
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