1
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Liyanage Perera E, Lee D. Synthesis of 4-Pyrones by Formal Hydration of 1,3-Diynones Promoted by 1,4-Addition of Piperidine. Org Lett 2022; 24:7042-7046. [PMID: 36125167 DOI: 10.1021/acs.orglett.2c02914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new approach for the synthesis of 4-pyrones with broader substrate scope and functional group tolerance is described. The reaction proceeds via an initial 1,4-addition by piperidine, followed by nitrogen-assisted 6-endo-dig cyclization and hydrolysis. 1,3-Diynones with nonenolizable electron-withdrawing ketones and nonpropargylic H provide relatively high yields. For substrates with particular R2 substituents, 1,4- or 1,6-adducts were isolated, suggesting that steric and electronic factors of the R2 substituent should have a strong impact on the 6-endo-dig cyclization.
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Affiliation(s)
- Erandi Liyanage Perera
- Department of Chemistry, University of Illinois─Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Daesung Lee
- Department of Chemistry, University of Illinois─Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
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2
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Shimura J, Ando Y, Suzuki K. Hydroxylamine-Mediated Anthrapyranone Formation, Solving 5-exo/6-endo Issue toward Synthesis of Pluramycin-Class Antibiotics. Org Lett 2019; 22:175-179. [PMID: 31841345 DOI: 10.1021/acs.orglett.9b04127] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In our synthetic study on pluramycin-class antibiotics, an unexpected issue arose, i.e., unfavorable regioselectivity of 5-exo rather than 6-endo cyclization to form the pyranone ring. The issue was solved by an addition-elimination process of a phenol-ynone substrate. AZADOL was specifically effective, enabling the first synthesis of saptomycinone H.
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Affiliation(s)
- Jun Shimura
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 O-okayama , Meguro-ku , Tokyo 152-8551 , Japan
| | - Yoshio Ando
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 O-okayama , Meguro-ku , Tokyo 152-8551 , Japan
| | - Keisuke Suzuki
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 O-okayama , Meguro-ku , Tokyo 152-8551 , Japan
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3
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Hsu DS, Huang JY. Total Synthesis and Determination of the Absolute Configuration of Parimycin. Org Lett 2019; 21:7665-7668. [PMID: 31512884 DOI: 10.1021/acs.orglett.9b02999] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first total syntheses of (±)-parimycin and (R)-parimycin were accomplished from O-methylnaphthazarin (6) in nine synthetic steps. Intermolecular Diels-Alder reaction of 6 with diene 7, cyclodehydrogenation catalyzed by iodine-dimethyl sulfoxide, and sodium dithionite reduction were the key steps. The absolute configuration of natural parimycin was determined to be S.
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Affiliation(s)
- Day-Shin Hsu
- Department of Chemistry and Biochemistry , National Chung Cheng University , Minhsiung 62102 , Taiwan
| | - Jiun-Yi Huang
- Department of Chemistry and Biochemistry , National Chung Cheng University , Minhsiung 62102 , Taiwan
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4
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Affiliation(s)
- Carmen Nájera
- Centro de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, Alicante E-03080, Spain
| | - Leiv K. Sydnes
- Department of Chemistry, University of Bergen, Allégt. 41, Bergen NO-5007, Norway
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, Alicante E-03080, Spain
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5
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Heravi MM, Mohammadkhani L. Recent applications of Stille reaction in total synthesis of natural products: An update. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.05.018] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Mabit T, Siard A, Pantin M, Zon D, Foulgoc L, Sissouma D, Guingant A, Mathé-Allainmat M, Lebreton J, Carreaux F, Dujardin G, Collet S. Total Synthesis of γ-Indomycinone and Kidamycinone by Means of Two Regioselective Diels–Alder Reactions. J Org Chem 2017; 82:5710-5719. [DOI: 10.1021/acs.joc.7b00544] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Thibaud Mabit
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
| | - Aymeric Siard
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
| | - Mathilde Pantin
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
| | - Doumadé Zon
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
| | - Laura Foulgoc
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
| | - Drissa Sissouma
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
| | - André Guingant
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
| | - Monique Mathé-Allainmat
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
| | - Jacques Lebreton
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
| | - François Carreaux
- UMR
6226 CNRS-Université de Rennes 1, Institut des Sciences Chimiques de Rennes, 263, avenue du Général Leclerc, Campus
de Beaulieu, Bâtiment 10A, 35042 Cedex Rennes, France
| | - Gilles Dujardin
- UMR
CNRS 6283, Faculté des Sciences, Université du Maine, Institut des Molécules et Matériaux du Mans, Avenue O. Messiaen, 72085 Le Mans cedex 9, France
| | - Sylvain Collet
- Chimie
Et Interdisciplinarité: Synthèse, Analyse, Modélisation
(CEISAM), UMR CNRS n° 6230, Université de Nantes, CNRS, 2, chemin
de la Houssinière − BP, 92208−44322 NANTES Cedex 3, France
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7
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Zhao H, Xiao M, Xu L, Wang L, Xiao J. Bifunctional thiourea catalyzed asymmetric Michael addition of anthrone to methyleneindolinones. RSC Adv 2016. [DOI: 10.1039/c5ra21614a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bifunctional thiourea catalyzed asymmetric conjugate addition of anthrones to methyleneindolinones were developed to prepare biologically significant hybrid derivatives of oxindoles and anthrones in high yield, high regioselectivity and stereoselectivity.
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Affiliation(s)
- Huaili Zhao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Mingyan Xiao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
- Open Project Program of Hubei Key Laboratory of Drug Synthesis and Optimization
| | - Jian Xiao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
- Open Project Program of Hubei Key Laboratory of Drug Synthesis and Optimization
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8
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Jones KD, Rixson JE, Skelton BW, Gericke KM, Stewart SG. The Total Synthesis of Heraclemycin B through β-Ketosulfoxide and Aldehyde Annulation. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kieran D. Jones
- School of Chemistry and Biochemistry; The University of Western Australia (M310); 35 Stirling Highway Crawley WA 6009 (Australia)
| | - James E. Rixson
- School of Chemistry and Biochemistry; The University of Western Australia (M310); 35 Stirling Highway Crawley WA 6009 (Australia)
| | - Brian W. Skelton
- Centre for Microscopy, Characterisation and Analysis; The University of Western Australia; Crawley WA 6009 Australia
| | | | - Scott G. Stewart
- School of Chemistry and Biochemistry; The University of Western Australia (M310); 35 Stirling Highway Crawley WA 6009 (Australia)
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9
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Metal-free methodology for the preparation of sterically hindered alkynoylphenols and its application to the synthesis of flavones and aurones. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.097] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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10
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The synthesis and biological activity of novel anthracenone-pyranones and anthracenone-furans. Bioorg Med Chem 2015; 23:3552-65. [DOI: 10.1016/j.bmc.2015.04.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Revised: 04/02/2015] [Accepted: 04/09/2015] [Indexed: 11/24/2022]
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11
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Pantin M, Zon D, Vomiandry R, Foulgoc L, Sissouma D, Guingant A, Collet S. Total synthesis of (±)-γ-indomycinone. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Suzuki K, Matsumoto T, Kitamura K, Ando Y, Maezawa Y. Toward the Pluramycins: Route Exploration from Dihydroxyanthrone Tricyclic Platform to an Aglycon, Saptomycinone B. HETEROCYCLES 2015. [DOI: 10.3987/com-14-s(k)106] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Hartung J, Wright BJD, Danishefsky SJ. Studies toward the total synthesis of pluraflavin A. Chemistry 2014; 20:8731-6. [PMID: 24919792 PMCID: PMC4795151 DOI: 10.1002/chem.201402254] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Indexed: 11/05/2022]
Abstract
A synthetic strategy towards the potent cytostatic agent pluraflavin A has been developed. Formation of the enantioenriched anthrapyran core bearing a halogen atom enabled the introduction of the α C-aryl glycoside by Stille cross-coupling and subsequent hydrogenation of the aryl glycal. Chemo- and stereoselective O-glycosylations of α oliose and β 3-epi vancosamine residues afforded a fully glycosylated aromatic core. Attempts to install the dimethylamino group of the C-disaccharide suggest that introduction of an azide group by displacement and subsequent reduction may pave the way to the total synthesis of pluraflavin A.
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Affiliation(s)
- John Hartung
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
| | | | - Samuel J. Danishefsky
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
- Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, Fax: (+) (212) 772-8691
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14
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Raju R, Gromyko O, Fedorenko V, Herrmann J, Luzhetskyy A, Müller R. Rubimycinone A, a new anthraquinone from a terrestrial Streptomyces sp. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.11.130] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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O'Keefe BM, Mans DM, Kaelin DE, Martin SF. Studies Toward the Syntheses of Pluramycin Natural Products. The First Total Synthesis of Isokidamycin. Tetrahedron 2011; 67:6524-6538. [PMID: 21804649 PMCID: PMC3145363 DOI: 10.1016/j.tet.2011.05.117] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We report the first total synthesis of the complex C-aryl glycoside isokidamycin, the epimer of the naturally-occurring pluramycin antibiotic kidamycin. The synthesis features a highly efficientDiels-Alder reaction between a substituted naphthyne and a glycosylatedfuran to form the anthracene core bearing a pendant angolosamine C-glycoside. The regiochemical outcome of the Diels-Alder reaction was controlled by employing a disposable silicon-tether to link the reactive napthyne and the glycosyl furan, rendering the cycloaddition intramolecular. The benzopyranone moietyof the aromatic nucleus was appended by cyclization of a functionalized vinylogous amide onto an advanced anthrol intermediate. The vancosamine amino glycoside was introduced by an O→C-glycoside rearrangement that produced the β-anomer. Subsequent refunctionalizations then led to isokidamycin.
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Affiliation(s)
- B Michael O'Keefe
- Department of Chemistry and Biochemistry The University of Texas at Austin, 1 University Station A5300 Austin, TX 78712-0165
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16
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Gilmore K, Alabugin IV. Cyclizations of Alkynes: Revisiting Baldwin’s Rules for Ring Closure. Chem Rev 2011; 111:6513-56. [DOI: 10.1021/cr200164y] [Citation(s) in RCA: 387] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Kerry Gilmore
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306-4390
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306-4390
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17
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Alabugin IV, Gilmore K, Manoharan M. Rules for Anionic and Radical Ring Closure of Alkynes. J Am Chem Soc 2011; 133:12608-23. [DOI: 10.1021/ja203191f] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Igor V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306-4390, United States
| | - Kerry Gilmore
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306-4390, United States
| | - Mariappan Manoharan
- School of Science, Engineering and Mathematics, Bethune-Cookman University, Daytona Beach, Florida 32114, United States
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18
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Krohn K, Tran-Thien HT, Ahmed I. General Approach to Anthrapyran Antibiotics Exemplified by the Synthesis of rac-γ-Indomycinone. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100093] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Neufeind S, Hülsken N, Neudörfl JM, Schlörer N, Schmalz HG. Total Synthesis of cyclo-Mumbaistatin Analogues through Anionic Homo-Fries Rearrangement. Chemistry 2011; 17:2633-41. [DOI: 10.1002/chem.201003166] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Indexed: 11/07/2022]
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20
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Murphy BT, Narender T, Kauffman CA, Woolery M, Jensen PR, Fenical W. Saliniquinones A-F, New Members of the Highly Cytotoxic Anthraquinone-γ-Pyrones from the Marine Actinomycete Salinispora arenicola.. Aust J Chem 2010; 63. [PMID: 24223427 DOI: 10.1071/ch10068] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Six new anthraquinone-γ-pyrones, saliniquinones A-F (1-6), which are related to metabolites of the pluramycin/altromycin class, were isolated from a fermentation broth of the marine actinomycete Salinispora arenicola (strain CNS-325). Their structures were determined by analysis of one- and two-dimensional NMR spectroscopic and high-resolution mass spectrometric data. The relative and absolute configurations of compounds 1-6 were determined by analysis of NOESY NMR spectroscopic data and by comparison of circular dichroism and optical rotation data with model compounds found in the literature. Saliniquinone A (1) exhibited potent inhibition of the human colon adenocarcinoma cell line (HCT-116) with an IC50 of 9.9 × 10-9 M. In the context of the biosynthetic diversity of S. arenicola, compounds 1-6 represent secondary metabolites that appear to be strain specific and thus occur outside of the core group of compounds commonly observed from this species.
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Affiliation(s)
- Brian T Murphy
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California-San Diego, La Jolla, CA 92093-0204, USA
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21
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Wright BJD, Hartung J, Peng F, Van de Water R, Liu H, Tan QH, Chou TC, Danishefsky SJ. Synthesis of pluraflavin A "aglycone". J Am Chem Soc 2009; 130:16786-90. [PMID: 19049469 DOI: 10.1021/ja805936v] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The "aglycone" of pluraflavin A (2) has been synthesized. The key features of this synthesis include a 1,3-dipolar cycloaddition between a nitrile oxide (cf. 14) and an olefin (22) to yield an isoxazoline followed by subsequent conversion into the gamma-pyrone of pluraflavin A. The epoxide moiety linked to the pyrone is installed prior to Diels-Alder installation of the D ring, which allows access to a number of potentially active cytotoxic intermediates en route to the final compound. The preliminary in vitro results of two such compounds are also included with the racemic title compound exhibiting cytotoxicity in the nanomolar range.
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Affiliation(s)
- Benjamin J D Wright
- Department of Chemistry, Columbia University, Havemeyer Hall, 3000 Broadway, New York, New York 10027, USA
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22
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Worayuthakarn R, Boonya-udtayan S, Arom-oon E, Ploypradith P, Ruchirawat S, Thasana N. Synthesis of unsymmetrical benzil licoagrodione. J Org Chem 2008; 73:7432-5. [PMID: 18712927 DOI: 10.1021/jo8013353] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A synthesis of unsymmetrical 1,2-diarylethane-1,2-dione is reported involving the intramolecular cyclization of anionic benzylic ester of the aryl benzyl ether followed by oxidation employing dioxirane. With the use of microwave irradiation, licoagrodione was prepared from Claisen rearrangement of the corresponding allyl phenyl ether 1,2-diketone readily available from the Lindlar's reduction of the corresponding alkyne derivative. Subsequent removal of protecting groups then furnished the desired product.
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Affiliation(s)
- Rattana Worayuthakarn
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, Laksi, Bangkok 10210, Thailand
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23
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Boukouvalas J, Wang JX. Structure Revision and Synthesis of a Novel Labdane Diterpenoid from Zingiber ottensii. Org Lett 2008; 10:3397-9. [DOI: 10.1021/ol8011919] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John Boukouvalas
- Département de Chimie, Université Laval, Quebec City, Quebec G1K 7P4, Canada
| | - Jian-Xin Wang
- Département de Chimie, Université Laval, Quebec City, Quebec G1K 7P4, Canada
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24
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Synthesis of six-membered oxygenated heterocycles through carbon–oxygen bond-forming reactions. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.11.092] [Citation(s) in RCA: 212] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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26
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Tietze LF, Singidi RR, Gericke KM, Böckemeier H, Laatsch H. Isolation, Enantioselective Total Synthesis and Structure Determination of the Anthrapyran Metabolite SS 43405-e. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700534] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Tietze LF, Singidi RR, Gericke KM. Total Synthesis of the Proposed Structure of the Anthrapyran Metabolite δ-Indomycinone. Chemistry 2007; 13:9939-47. [PMID: 17886848 DOI: 10.1002/chem.200700823] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The first total synthesis of the proposed structure of delta-indomycinone has been accomplished. The key steps involve the Diels-Alder reaction of a bromonaphthoquinone (6) and 1-methoxy-3-methyl-1-trimethylsiloxy-1,3-butadiene (7) to access the anthraquinone skeleton, representing a common building block of other naturally occurring anthraquinone antibiotics, regioselective bromination of anthraquinone (14) and a highly diastereoselective alkylation of enantiomerically pure dioxolanone 8. The reported synthetic approach has the advantage of high yields, excellent selectivity and a remarkable general applicability for the total synthesis of other anthrapyran natural products. The spectroscopic data obtained for the synthetic compounds 2 and 36 are not in agreement with those reported for the natural product, and therefore revision of the assigned structure is required.
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Affiliation(s)
- Lutz F Tietze
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstrasse 2, Göttingen, Germany.
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28
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Tietze LF, Gericke KM, Schuberth I. Synthesis of Highly Functionalized Anthraquinones and Evaluation of Their Antitumor Activity. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700418] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Krohn K, Tran-Thien HT, Vitz J, Vidal A. Total Synthesis ofrac-γ-Indomycinone by Baker–Venkataraman Rearrangement. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700015] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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Tietze LF, Gericke KM, Singidi RR, Schuberth I. Novel strategies for the synthesis of anthrapyran antibiotics: discovery of a new antitumor agent and total synthesis of (S)-espicufolin. Org Biomol Chem 2007; 5:1191-200. [PMID: 17406717 DOI: 10.1039/b700838d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two high-yielding strategies for the synthesis of 4H-anthra[1,2-b]pyran antibiotics have been developed giving access to novel antitumor agent (ED(50) 1.5 microm) and to (S)-espicufolin (3). A key step for the assembly of the tetracyclic 4H-anthra[1,2-b]pyran-4,7,12-trione skeleton is the nucleophilic addition of an aryl lithium species onto an aldehyde which allows the introduction of either an ynone or 1,3-diketo side chain, serving as precursors for an acid-catalysed cyclisation.
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Affiliation(s)
- Lutz F Tietze
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstrasse 2, 37077, Göttingen, Germany.
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