1
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Lin CT, Yang YH, Cheng JJ, Don MJ. Total Syntheses, Absolute Configurations, and Cytotoxicity Evaluation of Ugonstilbenes A, B, and C from the Rhizomes of Helminthostachys zeylanica. JOURNAL OF NATURAL PRODUCTS 2023; 86:307-316. [PMID: 36691388 DOI: 10.1021/acs.jnatprod.2c00919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
This study describes the first and efficient syntheses of the naturally occurring ugonstilbenes A, B, and C. The stilbene skeleton was prepared using the Horner-Wadsworth-Emmons reaction. On the basis of their specific rotations, the absolute configurations of ugonstilbenes A and C were both determined to be R, while the absolute configuration of ugonstilbene B was determined as 4aS,9aR. The synthesized compounds showed cytotoxic activities against selected human cancer cell lines.
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Affiliation(s)
- Cheng-Tin Lin
- National Research Institute of Chinese Medicine, No. 155-1, Sec. 2, Linong Street, Beitou District, Taipei 11221, Taiwan, R.O.C
| | - Yao-Hung Yang
- Department of Chemistry, Chinese Culture University, No. 55, Hwa-Kang Road, Yang-Ming-Shan, Taipei 11114, Taiwan,R.O.C
| | - Jing-Jy Cheng
- National Research Institute of Chinese Medicine, No. 155-1, Sec. 2, Linong Street, Beitou District, Taipei 11221, Taiwan, R.O.C
| | - Ming-Jaw Don
- National Research Institute of Chinese Medicine, No. 155-1, Sec. 2, Linong Street, Beitou District, Taipei 11221, Taiwan, R.O.C
- Department of Chemistry, Chinese Culture University, No. 55, Hwa-Kang Road, Yang-Ming-Shan, Taipei 11114, Taiwan,R.O.C
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2
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Leonelli F, Piergentili I, Lucarelli G, Migneco LM, Marini Bettolo R. Unexpected Racemization in the Course of the Acetalization of (+)-(S)-5-Methyl-Wieland–Miescher Ketone with 1,2-Ethanediol and TsOH under Classical Experimental Conditions. Int J Mol Sci 2019; 20:ijms20246147. [PMID: 31817544 PMCID: PMC6941009 DOI: 10.3390/ijms20246147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 11/29/2019] [Accepted: 12/01/2019] [Indexed: 11/23/2022] Open
Abstract
(+)-(S) and (−)-(R)-5-methyl-Wieland-Miescher ketone (+)-1 and (−)-1, are important synthons in the diastereo and enantioselective syntheses of biological and/or pharmacological interesting compounds. A key step in these syntheses is the chemoselective C(1)O acetalization to (+)-5 and (−)-5, respectively. Various procedures for this transformation have been described in the literature. Among them, the classical procedure based on the use of 1,2-ethanediol and TsOH in refluxing benzene in the presence of a Dean-Stark apparatus. Within our work on bioactive natural products, it occurred to us to observe the partial racemization of (+)-5 in the course of the acetalization of (+)-1 by means of the latter methodology. Aiming to investigate this drawback, which, to our best knowledge, has no precedents in the literature, we acetalized with 1,2-ethanediol and TsOH in refluxing benzene and in the presence of a Dean–Stark apparatus under various experimental conditions, enantiomerically pure (+)-1. It was found that the extent of racemization depends on the TsOH/(+)-1 and 1,2-ethanediol/(+)-1 ratios. Mechanism hypotheses for this partial and unexpected racemization are provided.
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Affiliation(s)
- Francesca Leonelli
- Dipartimento di Biologia Ambientale, Università degli Studi La Sapienza, Piazzale Aldo Moro 5, I-00185 Roma, Italy
- Correspondence: ; Tel.: +39-64991-3197
| | - Irene Piergentili
- Dipartimento di Chimica, Università degli Studi La Sapienza, Piazzale Aldo Moro 5, I-00185 Roma, Italy; (I.P.); (G.L.); (L.M.M.); (R.M.B.)
| | - Giulio Lucarelli
- Dipartimento di Chimica, Università degli Studi La Sapienza, Piazzale Aldo Moro 5, I-00185 Roma, Italy; (I.P.); (G.L.); (L.M.M.); (R.M.B.)
| | - Luisa Maria Migneco
- Dipartimento di Chimica, Università degli Studi La Sapienza, Piazzale Aldo Moro 5, I-00185 Roma, Italy; (I.P.); (G.L.); (L.M.M.); (R.M.B.)
| | - Rinaldo Marini Bettolo
- Dipartimento di Chimica, Università degli Studi La Sapienza, Piazzale Aldo Moro 5, I-00185 Roma, Italy; (I.P.); (G.L.); (L.M.M.); (R.M.B.)
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3
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Abstract
Total syntheses of clerodane diterpenoids have been reviewed from the literature since 2000.
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Affiliation(s)
- Hisahiro Hagiwara
- Graduate School of Science and Technology, Niigata University, Nishiku, Niigata, Japan
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4
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Neumeyer M, Kopp J, Brückner R. Controlling the Substitution Pattern of Hexasubstituted Naphthalenes by Aryne/Siloxyfuran Diels-Alder Additions: Regio- and Stereocontrolled Synthesis of Arizonin C1 Analogs. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700195] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Markus Neumeyer
- Institut für Organische Chemie; Albert-Ludwigs-Universität; Albertstraße 21 79104 Freiburg Germany
| | - Julia Kopp
- Institut für Organische Chemie; Albert-Ludwigs-Universität; Albertstraße 21 79104 Freiburg Germany
| | - Reinhard Brückner
- Institut für Organische Chemie; Albert-Ludwigs-Universität; Albertstraße 21 79104 Freiburg Germany
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5
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Zhang MY, Barrow RA. Accessing Polyoxygenated Dibenzofurans via the Union of Phenols and o-Benzoquinones: Rapid Syntheses of Metabolites Isolated from Ribes takare. Org Lett 2017; 19:2302-2305. [DOI: 10.1021/acs.orglett.7b00840] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Meng Yao Zhang
- Research School of Chemistry, Australian National University, Acton, ACT 2601, Australia
| | - Russell A. Barrow
- Research School of Chemistry, Australian National University, Acton, ACT 2601, Australia
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6
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Takeda Y, Narita K, Katoh T. Total Synthesis of Marine Sesquiterpene Quinones (+)-Cyclospongiaquinone-1 and (-)-Dehydrocyclospongiaquinone-1 with a Tetracyclic Benzo[a]xanthene Skeleton. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601160] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuki Takeda
- Laboratory of Synthetic and Medicinal Chemistry; Faculty of Pharmaceutical Sciences; Tohoku Medical and Pharmaceutical University; 4-4-1 Komatsushima, Aoba-ku 981-8558 Sendai Japan
| | - Koichi Narita
- Laboratory of Synthetic and Medicinal Chemistry; Faculty of Pharmaceutical Sciences; Tohoku Medical and Pharmaceutical University; 4-4-1 Komatsushima, Aoba-ku 981-8558 Sendai Japan
| | - Tadashi Katoh
- Laboratory of Synthetic and Medicinal Chemistry; Faculty of Pharmaceutical Sciences; Tohoku Medical and Pharmaceutical University; 4-4-1 Komatsushima, Aoba-ku 981-8558 Sendai Japan
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7
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Abstract
Concise syntheses of parvistemin A and diperezone are achieved using ring expansion of cyclobutenones and oxidative phenolic coupling under basic conditions.
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Affiliation(s)
- Songsong Gao
- School of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education of China
- Northwest University
- Xi'an 710127
- China
| | - Xiangdong Hu
- School of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education of China
- Northwest University
- Xi'an 710127
- China
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8
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Schiavo L, Jeanmart L, Lanners S, Choppin S, Hanquet G. FeCl3·6H2O/acetaldehyde, a versatile system for the deprotection of ketals and acetals via a transacetalization process. NEW J CHEM 2017. [DOI: 10.1039/c6nj03439j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mild and efficient catalytic deprotection of ketals/acetals mediated by FeCl3·6H2O/acetaldehyde has been described in this paper.
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Affiliation(s)
- Lucie Schiavo
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509)
- University of Strasbourg
- ECPM
- 67087 Strasbourg
- France
| | - Loïc Jeanmart
- Unité de Chimie Organique et Bioorganique Supramoléculaire
- University of Namur
- 5000 Namur
- Belgium
| | - Steve Lanners
- Unité de Chimie Organique et Bioorganique Supramoléculaire
- University of Namur
- 5000 Namur
- Belgium
| | - Sabine Choppin
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509)
- University of Strasbourg
- ECPM
- 67087 Strasbourg
- France
| | - Gilles Hanquet
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509)
- University of Strasbourg
- ECPM
- 67087 Strasbourg
- France
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9
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Love BE. Isolation and synthesis of polyoxygenated dibenzofurans possessing biological activity. Eur J Med Chem 2015; 97:377-87. [DOI: 10.1016/j.ejmech.2015.01.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 01/05/2015] [Indexed: 11/26/2022]
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10
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Katoh T, Monma H, Wakasugi J, Narita K, Katoh T. Synthesis of β-Lapachone, a Potential Anticancer Agent from the Lapacho Tree. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403064] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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11
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Fukui Y, Narita K, Katoh T. Enantioselective total synthesis of dysidavarone A, a novel sesquiterpenoid quinone from the marine sponge Dysidea avara. Chemistry 2014; 20:2436-9. [PMID: 24482283 DOI: 10.1002/chem.201304809] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Indexed: 12/13/2022]
Abstract
Dysidavarone A, a structurally unprecedented sesquiterpenoid quinone, was synthesized in 30 % overall yield in a longest liner sequence of 13 steps from commercially available o-vanillin. A highly strained and bridged eight-membered carbocyclic core was established by the C7-C21 carbon bond formation through a copper enolate mediated Michael addition to the internal quinone ring.
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Affiliation(s)
- Yurie Fukui
- Laboratory of Synthetic and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558 (Japan), Fax: (+81) 22-727-0135
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12
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Katoh T. Total Synthesis of Decahydrobenzo[d]xanthene Sesquiterpenoids Aureol, Strongylin A, and Stachyflin: Development of a New Strategy for the Construction of a Common Tetracyclic Core Structure. HETEROCYCLES 2013. [DOI: 10.3987/rev-13-779] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [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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Gordaliza M. Synthetic strategies to terpene quinones/hydroquinones. Mar Drugs 2012; 10:358-402. [PMID: 22412807 PMCID: PMC3297003 DOI: 10.3390/md10020358] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2011] [Revised: 02/03/2012] [Accepted: 02/03/2012] [Indexed: 12/26/2022] Open
Abstract
The cytotoxic and antiproliferative properties of many natural sesquiterpene-quinones and -hydroquinones from sponges offer promising opportunities for the development of new drugs. A review dealing with different strategies for obtaining bioactive terpenyl quinones/hydroquinones is presented. The different synthetic approches for the preparation of the most relevant quinones/hydroquinones are described.
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Affiliation(s)
- Marina Gordaliza
- Farmacy Faculty and Institute of Science and Technology Studies, Campus Miguel de Unamuno, Salamanca University, 37007 Salamanca, Spain
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14
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Katoh T, Watanabe K, Sugizaki T, Tozawa Y. A NEW ENTRY TO THE SYNTHESIS OF PRIMIN VIA A B-ALKYL SUZUKI–MIYAURA CROSS-COUPLING REACTION. HETEROCYCLES 2012. [DOI: 10.3987/com-12-s(n)104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Narita K, Nakamura K, Abe Y, Katoh T. Total Synthesis of Bauhinoxepin J: A Biologically Active Dibenzo[b,f]oxepin Isolated from Bauhinia purpurea. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100845] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Leonelli F, Garofalo B, Migneco LM, Marini Bettolo R, Colais F, Sinibaldi M. Chiral HPLC Resolution of the Wieland–Miescher Ketone and Derivatives. J LIQ CHROMATOGR R T 2011. [DOI: 10.1081/jlc-120017179] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Francesca Leonelli
- a Dipartimento di Chimica , Università di Roma “La Sapienza” , Rome , Italy
- b Istituto di Chimica Biomolecolare del CNR, Sezione di Roma , Università di Roma “La Sapienza” , Rome , Italy
| | - Barbara Garofalo
- a Dipartimento di Chimica , Università di Roma “La Sapienza” , Rome , Italy
- c Dipartimento di Chimica, Ingegneria Chimica e Materiali , Università de L'Aquila , L'Aquila , Italy
| | - Luisa M. Migneco
- a Dipartimento di Chimica , Università di Roma “La Sapienza” , Rome , Italy
- b Istituto di Chimica Biomolecolare del CNR, Sezione di Roma , Università di Roma “La Sapienza” , Rome , Italy
| | - Rinaldo Marini Bettolo
- a Dipartimento di Chimica , Università di Roma “La Sapienza” , Rome , Italy
- b Istituto di Chimica Biomolecolare del CNR, Sezione di Roma , Università di Roma “La Sapienza” , Rome , Italy
| | - Francesca Colais
- d CNR‐Area della Ricerca di Roma , Istituto di Metodologie Chimiche , P. O. Box 10, I‐00016, Monterotondo Stazione, Rome , Italy
| | - Massimo Sinibaldi
- d CNR‐Area della Ricerca di Roma , Istituto di Metodologie Chimiche , P. O. Box 10, I‐00016, Monterotondo Stazione, Rome , Italy
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17
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Zhang Z, Chen J, Yang Z, Tang Y. Rapid Biomimetic Total Synthesis of (±)-Rossinone B. Org Lett 2010; 12:5554-7. [DOI: 10.1021/ol102438r] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ziyang Zhang
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), College of Chemistry, Peking University, Beijing 100871, China, and The Comprehensive AIDS Research Center, School of Medicine, Tsinghua University, Beijing 100084, China
| | - Jiahua Chen
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), College of Chemistry, Peking University, Beijing 100871, China, and The Comprehensive AIDS Research Center, School of Medicine, Tsinghua University, Beijing 100084, China
| | - Zhen Yang
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), College of Chemistry, Peking University, Beijing 100871, China, and The Comprehensive AIDS Research Center, School of Medicine, Tsinghua University, Beijing 100084, China
| | - Yefeng Tang
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), College of Chemistry, Peking University, Beijing 100871, China, and The Comprehensive AIDS Research Center, School of Medicine, Tsinghua University, Beijing 100084, China
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18
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Ramachary DB, Vijayendar Reddy Y. A general approach to chiral building blocks via direct amino acid-catalyzed cascade three-component reductive alkylations: formal total synthesis of HIV-1 protease inhibitors, antibiotic agglomerins, brefeldin A, and (R)-gamma-hexanolide. J Org Chem 2010; 75:74-85. [PMID: 19954143 DOI: 10.1021/jo901799n] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Multicatalysis cascade (MCC) process for the synthesis of highly substituted chiral building blocks (2-alkyl-CH-acids, 2-alkylcyclohexane-1,3-diones, 2-alkylcyclopentane-1,3-diones, and H-P ketone analogues) is presented based on the cascade three-component reductive alkylation's (TCRA) platform. Herein, we developed the high-yielding alkylation of a variety of CH-acids with (R)-glyceraldehyde acetonide/(S)-Garner aldehyde and Hantzsch ester through amino acid-catalyzed TCRA reaction without racemization at the alpha-position to carbonyl. Direct sequential combination of the L-proline-catalyzed TCRA reaction with other reactions like cascade alkylation/ketenization/esterification (A/K/E), alkylation/ketenization/esterification/alkylation (A/K/E/A), Brønsted acid-catalyzed cascade hydrolysis/lactonization/esterification (H/L/E), hydrolysis/esterification (H/E), hydrolysis/oxy-Michael/dehydration (H/OM/DH), and Robinson annulation (RA) of CH-acids, chiral aldehydes, Hantzsch ester, diazomethane, methyl vinyl ketone, various active olefins, and acetylenes furnished the highly functionalized chiral building blocks in good to high yields with excellent diastereoselectivities. In this context, many of the pharmaceutically applicable chiral building blocks were prepared via MCC reactions.
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Affiliation(s)
- Dhevalapally B Ramachary
- School of Chemistry, University of Hyderabad, Central University (PO), Hyderabad 500 046, India.
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19
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Oguchi T, Watanabe K, Ohkubo K, Abe H, Katoh T. Enantioselective total synthesis of (-)-candelalides A, B and C: potential Kv1.3 blocking immunosuppressive agents. Chemistry 2009; 15:2826-45. [PMID: 19191240 DOI: 10.1002/chem.200802122] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Novel Kv1.3 blocking immunosuppressants, (-)-candelalides A, B and C, were efficiently synthesized for the first time in a convergent and unified manner starting from (+)-5-methyl-Wieland-Miescher ketone. The synthetic method involved the following key steps: i) a strategic [2,3]-Wittig rearrangement of a stannylmethyl ether to install the stereogenic center at C9 and the exo-methylene function at C8 present in the decalin portion; ii) a straightforward coupling of a trans-decalin portion (BC ring) and a gamma-pyrone moiety through the C16-C3' bond to assemble the requisite carbon framework; and iii) a construction of a characteristic di or tetrahydropyran ring (A ring) by internal nucleophilic ring closure of a hydroxy aldehyde or a hydroxy epoxide. The present total synthesis has fully established the absolute configuration of these natural products.
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Affiliation(s)
- Takamasa Oguchi
- Laboratory of Synthetic Medicinal Chemistry, Department of Chemical Pharmaceutical Science, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
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20
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Ishii S, Fujii M, Akita H. First Syntheses of (-)-Tauranin and Antibiotic (-)-BE-40644 Based on Lipase-Catalyzed Optical Resolution of Albicanol. Chem Pharm Bull (Tokyo) 2009; 57:1103-6. [DOI: 10.1248/cpb.57.1103] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Mikio Fujii
- Faculty of Pharmaceutical Sciences, Toho University
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21
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Munday RH, Denton RM, Anderson JC. Asymmetric Synthesis of 6′-Hydroxyarenarol: The Proposed Biosynthetic Precursor to Popolohuanone E. J Org Chem 2008; 73:8033-8. [DOI: 10.1021/jo801404u] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rachel H. Munday
- School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Ross M. Denton
- School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - James C. Anderson
- School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
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22
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Sakurai J, Oguchi T, Watanabe K, Abe H, Kanno SI, Ishikawa M, Katoh T. Highly efficient total synthesis of the marine natural products (+)-avarone, (+)-avarol, (-)-neoavarone, (-)-neoavarol and (+)-aureol. Chemistry 2008; 14:829-37. [PMID: 17992684 DOI: 10.1002/chem.200701386] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Biologically important and structurally unique marine natural products avarone (1), avarol (2), neoavarone (3), neoavarol (4) and aureol (5), were efficiently synthesized in a unified manner starting from (+)-5-methyl-Wieland-Miescher ketone 10. The synthesis involved the following crucial steps: i) Sequential BF(3)Et(2)O-induced rearrangement/cyclization reaction of 2 and 4 to produce 5 with complete stereoselectivity in high yield (2 --> 5 and 4 --> 5); ii) strategic salcomine oxidation of the phenolic compounds 6 and 8 to derive the corresponding quinones 1 and 3 (6 --> 1 and 8 --> 3); and iii) Birch reductive alkylation of 10 with bromide 11 to construct the requisite carbon framework 12 (10 + 11 --> 12). An in vitro cytotoxicity assay of compounds 1-5 against human histiocytic lymphoma cells U937 determined the order of cytotoxic potency (3 > 1 > 5 > 2 > 4) and some novel aspects of structure-activity relationships.
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Affiliation(s)
- Junji Sakurai
- Laboratory of Synthetic Medicinal Chemistry, Department of Chemical Pharmaceutical Science, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
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23
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Guillena G, Nájera C, Ramón DJ. Enantioselective direct aldol reaction: the blossoming of modern organocatalysis. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.tetasy.2007.09.025] [Citation(s) in RCA: 311] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Maezawa N, Furuichi N, Tsuchikawa H, Katsumura S. Synthesis of a novel sphingosine kinase inhibitor (−)-F-12509A and determination of its absolute configuration. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.05.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Takeya T, Kondo H, Otsuka T, Tomita K, Okamoto I, Tamura O. A Novel Construction of Dibenzofuran-1,4-diones by Oxidative Cyclization of Quinone-arenols. Org Lett 2007; 9:2807-10. [PMID: 17580881 DOI: 10.1021/ol070951i] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel oxidative cyclization of quinone-arenols 5 leading to products 6 with a dibenzofuran-1,4-dione structure, which forms the core of several natural products, has been developed and applied to the synthesis of violet-quinone (4).
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Affiliation(s)
- Tetsuya Takeya
- Showa Pharmaceutical University, 3-3165 Higashi-tamagawagakuen, Machida, Tokyo 194-8543, Japan
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26
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Ramachary DB, Kishor M. Organocatalytic sequential one-pot double cascade asymmetric synthesis of Wieland-Miescher ketone analogues from a Knoevenagel/hydrogenation/Robinson annulation sequence: scope and applications of organocatalytic biomimetic reductions. J Org Chem 2007; 72:5056-68. [PMID: 17552564 DOI: 10.1021/jo070277i] [Citation(s) in RCA: 159] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A practical and novel organocatalytic chemo- and enantioselective process for the cascade synthesis of highly substituted 2-alkyl-cyclohexane-1,3-diones and Wieland-Miescher (W-M) ketone analogs is presented via reductive alkylation as a key step. First time, we developed the one-step alkylation of dimedone and 1,3-cyclohexanedione with aldehydes and Hantzsch ester through an organocatalytic reductive alkylation strategy. Direct combination of l-proline-catalyzed cascade Knoevenagel/hydrogenation and cascade Robinson annulation of CH acids (dimedone and 1,3-cyclohexanedione), aldehydes, Hantzsch ester, and methyl vinyl ketone furnished the highly functionalized W-M ketone analogues in good to high yields and with excellent enantioselectivities. Many of the reductive alkylation products show a direct application in pharmaceutical chemistry.
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Affiliation(s)
- Dhevalapally B Ramachary
- School of Chemistry, University of Hyderabad, Central University (PO), Hyderabad 500 046, India.
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Nagamine T, Inomata K, Endo Y, Paquette LA. Amino Acid Mediated Intramolecular Asymmetric Aldol Reaction to Construct a New Chiral Bicyclic Enedione Containing a Seven-Membered Ring: Remarkable Inversion of Enantioselectivity Compared to the Six-Membered Ring Example. J Org Chem 2006; 72:123-31. [PMID: 17194090 DOI: 10.1021/jo061824n] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A detailed study to assess the enantioselectivity of the amino acid mediated intramolecular asymmetric aldol reaction of 1,3-cycloheptanedione bearing a C-2 methyl substituent has been undertaken. The cyclizations were mediated by a series of l-amino acids in the presence of an acid cocatalyst. Strikingly, the process is characterized by an inversion of enantioselectivity when compared to a similar reaction involving the 1,3-cyclohexanedione counterpart.
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Affiliation(s)
- Takashi Nagamine
- Tohoku Pharmaceutical University, 4-4-1 Komatsushima Aoba-ku, Sendai 981-8558 Japan
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Takeya T, Kondo H, Otsuka T, Doi H, Okamoto I, Kotani E. Reactions of 1-Naphthols with .PI.-Acceptor p-Benzoquinones: Oxidative Aryl Coupling vs. Non-Oxidative Electrophilic Arylation. Chem Pharm Bull (Tokyo) 2005; 53:199-206. [PMID: 15684519 DOI: 10.1248/cpb.53.199] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the reactions of various 1-naphthols (NPOHs; 1) with p-benzoquinones (Qs), such as 1,4-benzoquinone (BQ) and p-chloranil (CA), as pi-electron acceptors. With electron-rich NPOHs 1a-c, oxidative biaryl coupling and subsequent dehydrogenation reaction took place selectively to give the corresponding 2,2'-binapthyl-1,1'-quinones 3a-c in excellent yield. In the case of electron-deficient NPOHs 1e, f, two different types of reactions occurred in the presence of SnCl4 and ZrO2 under similar conditions: SnCl4 mediated oxidative dimerization and trimerization of NPOH, while ZrO2 promoted electrophilic arylation of Qs with NPOH. The resulting products 3 would be useful synthetic intermediates for naturally occurring diosindigo B, biramentaceone and violet-quinone.
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Inomata K, Barragué M, Paquette LA. Diastereoselectivities Realized in the Amino Acid Catalyzed Aldol Cyclizations of Triketo Acetonides of Differing Ring Size. J Org Chem 2004; 70:533-9. [PMID: 15651798 DOI: 10.1021/jo0486084] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A study designed to assess the diastereoselectivity of the intramolecular aldol reaction of two differently sized monocyclic 1,3-diketones bearing a chiral, oxygenated side chain has been undertaken. The cyclizations were brought about under catalysis by pyrrolidine, a series of D- and L-amino acids including proline, and several proline derivatives. The levels of selectivity were found to be consistently higher with the six-membered ring system than its cycloheptane counterpart.
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Affiliation(s)
- Kohei Inomata
- Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210, USA
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Anderson JC, Denton RM, Wilson C. A Biomimetic Strategy for the Synthesis of the Tricyclic Dibenzofuran-1,4-dione Core of Popolohuanone E. Org Lett 2004; 7:123-5. [PMID: 15624993 DOI: 10.1021/ol047825o] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A concise synthesis of the complete tricyclic dibenzofuran-1,4-dione aromatic core of popolohuanone E has been demonstrated by mild base treatment of a biquinone intermediate, thus establishing a biomimetic route to this family of heterocyclic ring systems and the total synthesis of popolohuanone E.
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Affiliation(s)
- James C Anderson
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, UK.
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Ogata T, Okamoto I, Kotani E, Takeya T. Biomimetic synthesis of the dinaphthofuranquinone violet-quinone, utilizing oxidative dimerization with the ZrO2/O2 system. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.03.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Anderson JC, Denton RM, Hickin H, Wilson C. Synthesis of dibenzofuran-1,4-diones using the Dötz benzannulation. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.01.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nakatani M, Nakamura M, Suzuki A, Inoue M, Katoh T. A new strategy toward the total synthesis of stachyflin, a potent anti-influenza A virus agent: concise route to the tetracyclic core structure. Org Lett 2002; 4:4483-6. [PMID: 12465918 DOI: 10.1021/ol0271032] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] A new strategy directed toward the total synthesis of stachyflin, a potent and novel anti-influenza A virus agent isolated from a microorganism, has been presented through the enantioselective synthesis of the tetracyclic core structure. The synthetic method features a BF(3) x Et(2)O-induced domino epoxide-opening/rearrangement/cyclization reaction as the key step.
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Affiliation(s)
- Mari Nakatani
- Sagami Chemical Research Center, Hayakawa 2743-1, Ayase, Kanagawa 252-1193, Japan
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Nakamura M, Suzuki A, Nakatani M, Fuchikami T, Inoue M, Katoh T. An efficient synthesis of (+)-aureol via boron trifluoride etherate-promoted rearrangement of (+)-arenarol. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)01627-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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36
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Chapter 5.3 Five-membered ring systems: Furans and benzofurans. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0959-6380(02)80009-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Abstract
[structure: see text]. Several novel scyphostatin analogues have been prepared in up to 18% yield over five steps from commercially available 4-bromoguaiacol, utilizing an organometallic addition to afford the desired syn-hydroxy-epoxides.
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Affiliation(s)
- K A Runcie
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
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