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Kimber MC, Lee DS. The Kornblum DeLaMare rearrangement in natural product synthesis: 25 years of innovation. Nat Prod Rep 2024; 41:813-833. [PMID: 38294038 DOI: 10.1039/d3np00058c] [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: 02/01/2024]
Abstract
Covering: 1998 up to the end of 2023Since its initial disclosure in 1951, the Kornblum DeLaMare rearrangement has proved an important synthetic transformation and has been widely adopted as a biomimetic step in natural product synthesis. Utilising the base catalysed decomposition of alkyl peroxides to yield a ketone and alcohol has found use in many syntheses as well as a key strategic step, including the unmasking of furans, as a biomimetic synthetic tool, and the use of the rearrangement to install oxygen enantioselectively. Since ca. 1998, its impact as a synthetic transformation has grown significantly, especially given the frequency of use in natural product syntheses, therefore this 25 year time period will be the focus of the review.
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Affiliation(s)
- Marc C Kimber
- Department of Chemistry, School of Science, Loughborough University, Loughborough, LE11 3TU, UK.
| | - Darren S Lee
- Centre for Green Chemistry and Green Engineering at Yale, Yale University, New Haven, CT 06511, USA.
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2
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Zhang Y, Chi Z, Li X, Xie Z. Highly Stereocontrolled Total Syntheses of Cedrane Sesquiterpenes via Cascade [5+2] Cycloaddition/Etherification. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100737] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuhan Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou Gansu 730000 China
| | - Zhiyong Chi
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou Gansu 730000 China
| | - Xiangxin Li
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou Gansu 730000 China
| | - Zhixiang Xie
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou Gansu 730000 China
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Sahu R, Singh V. Studies on synthesis and photoreaction of tricycloundecanes endowed with β,γ-enone chromophore: Towards angular triquinanes and annulated bicyclo[4.2.0]octanes. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Huo C, Dong J, Su Y, Tang J, Chen F. Iron-catalyzed oxidative sp3 carbon–hydrogen bond functionalization of 3,4-dihydro-1,4-benzoxazin-2-ones. Chem Commun (Camb) 2016; 52:13341-13344. [DOI: 10.1039/c6cc05885j] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Iron-catalyzed sp3 C–H bond functionalization of benzoxazinones has been developed and applied for the synthesis of natural product cephalandole A.
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Affiliation(s)
- Congde Huo
- Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- China
| | - Jie Dong
- Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- China
| | - Yingpeng Su
- Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- China
| | - Jing Tang
- Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- China
| | - Fengjuan Chen
- Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- China
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Affiliation(s)
- Shao-Zheng Peng
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan, ROC
| | - Chin-Kang Sha
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan, ROC
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Kulcitki V, Harghel P, Ungur N. Unusual cyclic terpenoids with terminal pendant prenyl moieties: from occurrence to synthesis. Nat Prod Rep 2015; 31:1686-720. [PMID: 25118808 DOI: 10.1039/c4np00081a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The paper reviews the known examples of cyclic terpenoids produced from open chain polyenic precursors by an "unusual" biosynthetic pathway, involving selective electrophilic attack on an internal double bond followed by cyclization. The resulting compounds possess cyclic backbones with pendant terminal prenyl groups. Synthetic approaches applied for the synthesis of such specifically functionalized compounds are also discussed, as well as biological activity of reported representatives.
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Affiliation(s)
- Veaceslav Kulcitki
- Institute of Chemistry, Moldova Academy of Sciences, Academiei str. 3, MD-2028, Chişinău, Republic of Moldova.
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Liu Y, Liniger M, McFadden RM, Roizen JL, Malette J, Reeves CM, Behenna DC, Seto M, Kim J, Mohr JT, Virgil SC, Stoltz BM. Formal total syntheses of classic natural product target molecules via palladium-catalyzed enantioselective alkylation. Beilstein J Org Chem 2014; 10:2501-12. [PMID: 25383121 PMCID: PMC4222294 DOI: 10.3762/bjoc.10.261] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 10/09/2014] [Indexed: 12/28/2022] Open
Abstract
Pd-catalyzed enantioselective alkylation in conjunction with further synthetic elaboration enables the formal total syntheses of a number of "classic" natural product target molecules. This publication highlights recent methods for setting quaternary and tetrasubstituted tertiary carbon stereocenters to address the synthetic hurdles encountered over many decades across multiple compound classes spanning carbohydrate derivatives, terpenes, and alkaloids. These enantioselective methods will impact both academic and industrial settings, where the synthesis of stereogenic quaternary carbons is a continuing challenge.
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Affiliation(s)
- Yiyang Liu
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Marc Liniger
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Ryan M McFadden
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Jenny L Roizen
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Jacquie Malette
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Corey M Reeves
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Douglas C Behenna
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Masaki Seto
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Jimin Kim
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Justin T Mohr
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Scott C Virgil
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, USA
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Zhou L, Liu Z, Liu Y, Zhang Y, Wang J. N-Tosylhydrazine-mediated deoxygenative hydrogenation of aldehydes and ketones catalyzed by Pd/C. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.05.070] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Moustafa GAI, Kamada Y, Tanaka T, Yoshimitsu T. Stereoconvergent route to chiral cyclohexenone building blocks: formal synthesis of (-)-dysidiolide. Org Biomol Chem 2013; 10:8609-15. [PMID: 23042006 DOI: 10.1039/c2ob26532j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A stereoconvergent access to chiral carbocyclic building blocks is reported. 6-(3'-Hydroxy-4'-methylpent-4'-enyl)-3-methoxy cyclohex-2-enone () that consists of four stereoisomers, i.e., racemic ca. 1 : 1 diastereomers, is converted to enantiomerically pure carbocycles through a combination of regioselective catalytic asymmetric reduction and alkylative remote stereoinduction. The present stereoconvergent strategy has allowed the formal synthesis of bioactive (-)-dysidiolide.
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Affiliation(s)
- Gamal A I Moustafa
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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Hog DT, Webster R, Trauner D. Synthetic approaches toward sesterterpenoids. Nat Prod Rep 2012; 29:752-79. [DOI: 10.1039/c2np20005h] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Das PP, Lysenko IL, Cha JK. Stereoselective Alkylation of Allylic Alcohols: Tandem Ethylation and Functionalization. Angew Chem Int Ed Engl 2011; 50:9459-61. [DOI: 10.1002/anie.201104331] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Indexed: 11/11/2022]
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12
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Das PP, Lysenko IL, Cha JK. Stereoselective Alkylation of Allylic Alcohols: Tandem Ethylation and Functionalization. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Sobenina LN, Stepanova ZV, Ushakov IA, Mikhaleva AI, Tomilin DN, Kazheva ON, Alexandrov GG, Dyachenko OA, Trofimov BA. From 4,5,6,7-tetrahydroindole to functionalized furan-2-one–4,5,6,7-tetrahydroindole–cyclobutene sequence in two steps. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Lavecchia A, Di Giovanni C, Novellino E. Inhibitors of Cdc25 phosphatases as anticancer agents: a patent review. Expert Opin Ther Pat 2010; 20:405-25. [PMID: 20166845 DOI: 10.1517/13543771003623232] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
IMPORTANCE OF THE FIELD The cell division cycle 25 (Cdc25) family of proteins are highly conserved dual specificity phosphatases that regulate cyclin-dependent kinases, the main gatekeepers of the eukaryotic cell division cycle. The three isoforms of Cdc25, including Cdc25A, Cdc25B and Cdc25C, appear to act on different cyclin-dependent kinase/cyclin complexes at different stages of the cell cycle. Overexpression of Cdc25A and/or Cdc25B, but not Cdc25C, has been detected in numerous cancers and is often correlated with a poor clinical prognosis. Thus, inhibition of these phosphatases may represent a promising therapeutic approach in oncology. AREAS COVERED IN THIS REVIEW The main focus of the present review is to describe the development of Cdc25 inhibitors over the years. We describe different compounds according to the decade of discovery and focus attention on molecules that were published in patents. WHAT THE READER WILL GAIN Insight into the most clinically relevant therapeutic Cdc25 analogues that have been published in over 40 patents over the past 19 years. TAKE HOME MESSAGE Some Cdc25 inhibitors have suppressed in vivo the growth of human tumor xenografts in animals; this confirmed the validity of using Cdc25 phosphatase inhibition as an anticancer strategy, but side effects and toxicity remain to be investigated.
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Affiliation(s)
- Antonio Lavecchia
- Università di Napoli Federico II, Facoltà di Farmacia, Dipartimento di Chimica Farmaceutica e Tossicologica, Drug Discovery Laboratory, Via D. Montesano 49, Napoli, 80131, Italy.
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Abstract
The Diels-Alder reaction has both enabled and shaped the art and science of total synthesis over the last few decades to an extent which, arguably, has yet to be eclipsed by any other transformation in the current synthetic repertoire. With myriad applications of this magnificent pericyclic reaction, often as a crucial element in elegant and programmed cascade sequences facilitating complex molecule construction, the Diels-Alder cycloaddition has afforded numerous and unparalleled solutions to a diverse range of synthetic puzzles provided by nature in the form of natural products. In celebration of the 100th anniversary of Alder's birth, selected examples of the awesome power of the reaction he helped to discover are discussed in this review in the context of total synthesis to illustrate its overall versatility and underscore its vast potential which has yet to be fully realized.
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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16
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Reactions of aminobenzoic acids with α,β-acetylenic γ-hydroxy nitriles: synthesis of functionalized amino acids and unusually facile esterification and acetylene hydration. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.01.073] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Affiliation(s)
- Norbert Hoffmann
- Laboratoire des Réactions Sélectives et Applications, UMR 6519 CNRS et Université de Reims Champagne-Ardenne, UFR Sciences, B.P. 1039, F-51687 Reims, Cedex 02, France
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Krivdin LB, Khutsishvili SS, Shemyakina OA, Mal'kina AG, Trofimov BA, Contreras RH. Stereochemical study of iminodihydrofurans based on experimental measurements and SOPPA calculations of (13)C-(13)C spin-spin coupling constants. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2007; 45:758-65. [PMID: 17661430 DOI: 10.1002/mrc.2044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Configurational assignment and conformational analysis of a series of iminodihydrofurans obtained from cyanoacetylenic alcohols were performed on the basis of experimental measurements and high-level ab initio calculations of their (13)C-(13)C spin-spin coupling constants. The title compounds were shown to form and exist in solution as the individual Z isomers, adopting the orthogonal orientation of the amino, alkylamino and dialkylamino groups and the s-trans orientation of the CONH(2) group at the C(4) position of the 2,5-dihydro-2-iminofuran moiety.
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Affiliation(s)
- Leonid B Krivdin
- A. E. Favorsky Institute of Chemistry, Irkutsk, Siberian Branch of the Russian Academy of Sciences, Favorsky St. 1, 664033 Irkutsk, Russia.
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Abstract
The regioselective synthesis of 3,5-disubstituted isoxazoles was achieved through the 1,3-dipolar cycloaddition of nitrile oxides with 1,1-disubstituted bromoalkenes. The substituted bromoalkenes function as alkyne synthons which were used to construct 5,5-disubstituted bromoisoxazoline intermediates that aromatize to the analogous isoxazoles through the loss of HBr.
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Ferreira CV, Justo GZ, Souza ACS, Queiroz KCS, Zambuzzi WF, Aoyama H, Peppelenbosch MP. Natural compounds as a source of protein tyrosine phosphatase inhibitors: application to the rational design of small-molecule derivatives. Biochimie 2006; 88:1859-73. [PMID: 17010496 DOI: 10.1016/j.biochi.2006.08.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2006] [Accepted: 08/25/2006] [Indexed: 12/21/2022]
Abstract
Reversible phosphorylation of tyrosine residues is a key regulatory mechanism for numerous cellular events. Protein tyrosine kinases and protein tyrosine phosphatases (PTPs) have a pivotal role in regulating both normal cell physiology and pathophysiology. Accordingly, deregulated activity of both protein tyrosine kinases and PTPs is involved in the development of numerous congenitically inherited and acquired human diseases, prompting obvious pharmaceutical and academic research interest. The development of compound libraries with higher selective PTP inhibitory activity has been bolstered by the realization that many natural products have such activity and thus are interesting biologically lead compounds, which properties are widely exploited. In addition, more rational approaches have focused on the incorporation of phosphotyrosine mimetics into specific peptide templates (peptidomimetic backbones). Additional factors furthering discovery as well as therapeutic application of new bioactive molecules are the integration of functional genomics, cell biology, structural biology, drug design, molecular screening and chemical diversity. Together, all these factors will lead to new avenues to treat clinical disease based on PTP inhibition.
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Affiliation(s)
- Carmen V Ferreira
- Laboratory of Cell Signaling, Departamento de Bioquímica, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), CP 6109, CEP 13083-970, Campinas, Sao Paulo, Brazil.
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(R)-4-Hydroxymethyl-2-phenyl-4,5-dihydrooxazol-4-ylmethyl acetate: chiral building block for the synthesis of optically active α-substituted α-amino acid derivatives. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.02.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Takao KI, Munakata R, Tadano KI. Recent advances in natural product synthesis by using intramolecular Diels-Alder reactions. Chem Rev 2006; 105:4779-807. [PMID: 16351062 DOI: 10.1021/cr040632u] [Citation(s) in RCA: 535] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ken-Ichi Takao
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama, Japan
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Miyaoka H, Yamanishi M, Mitome H. PLA2 Inhibitory Activity of Marine Sesterterpenoids Cladocorans, Their Diastereomers and Analogues. Chem Pharm Bull (Tokyo) 2006; 54:268-70. [PMID: 16462082 DOI: 10.1248/cpb.54.268] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Inhibition of secretory phospholipase A(2) (sPLA(2)) by cladocorans A and B and their diastereomers almost equaled that of manoalide.
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Affiliation(s)
- Hiroaki Miyaoka
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan.
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Shimazawa R, Suzuki T, Dodo K, Shirai R. Design and synthesis of dysidiolide analogs from vitamin D3: novel class of Cdc25A inhibitors. Bioorg Med Chem Lett 2004; 14:3291-4. [PMID: 15149692 DOI: 10.1016/j.bmcl.2004.03.100] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2004] [Accepted: 03/26/2004] [Indexed: 12/21/2022]
Abstract
Potent dysidiolide analogs were synthesized by structural hybridization of dysidiolide and vitamin D(3). These analogs exhibited strong inhibitory activity toward dual-specificity phosphatase Cdc25A (IC(50)=0.44-0.89 microM).
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Affiliation(s)
- Rumiko Shimazawa
- Institute of Molecular and Cellular Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
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Marcos IS, Pedrero AB, Sexmero MJ, Diez D, Basabe P, García N, Moro RF, Broughton HB, Mollinedo F, Urones JG. Synthesis of bioactive sesterterpenolides from ent-halimic acid. 15-epi-ent-Cladocoran A and B. J Org Chem 2003; 68:7496-504. [PMID: 12968906 DOI: 10.1021/jo034663l] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The bioactive sesterterpenoid gamma-hydroxybutenolides 15,18-bisepi-ent-Cladocoran A and B, 1 and 2, and 15-epi-ent-Cladocoran A and B, 57 and 55, were synthesized from ent-halimic acid. The synthesized sesterterpenolids 2, 55, 57, and 59 inhibited cellular proliferation (IC(50) congruent with 2 micro M) of a number of human leukaemic and solid tumor cell lines.
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Affiliation(s)
- I S Marcos
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain
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Miyaoka H, Yamanishi M, Kajiwara Y, Yamada Y. Total synthesis of cladocorans A and B: a structural revision. J Org Chem 2003; 68:3476-9. [PMID: 12713348 DOI: 10.1021/jo020743y] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cladocorans A and B, isolated from the Mediterranean coral Cladocora cespitosa, are novel sesterterpenoids whose structures were initially proposed as 1 and 2, respectively. These designations, however, subsequently came under doubt. In the present study, the synthesis of compounds 5 and 6 was undertaken. The physical properties of 5 and 6 were found to be identical to those of natural cladocorans A and B, whose structures were thus concluded to be 5 and 6, respectively. Cladocoran B is thus clearly shown to be an olefinic regioisomer of dysidiolide and cladocoran A as its acetate.
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Affiliation(s)
- Hiroaki Miyaoka
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
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Abstract
This paper describes the discovery and total synthesis of bioactive marine natural products conducted in our laboratory. Clavulone, chlorovulone, bromovulone, and iodovulone are antitumor marine prostanoids isolated from the Okinawan soft coral Clavularia viridis. The synthesis of clavulone and chlorovulone was achieved from chiral 4-hydroxy-2-cyclopentenone. Marine prostanoid punaglandins 3 and 4 were synthesized via similar methodology. The chemical structures of punaglandins 3 and 4 were revised by these syntheses. Dollaberane-type diterpenoid stolonidiol and claenone were isolated from Okinawan soft coral Clavularia sp. Stolonidiol showed potent choline acetyltransferase-inducible activity in cultured basal forebrain cells. The synthesis of stolondiol and claenone was conducted via sequential Michael reaction and retro-aldol reaction. Aragusterols, isolated from the Okinawan marine sponge Xestospongia sp., are structurally unique steroids possessing a rare 26,27-cyclo structure in the side chain. Aragusterols express potent in vivo antitumor activity against L1210 leukemia in mice. The synthesis of aragusterols was carried out via steroselective construction of the side chain and stereocontrolled coupling reaction with the steroid skeleton. Kalihinane-type diterpenoid kalihinol A, isolated by Scheuer, has remarkable in vitro antimalarial activity. The absolute configuration of kalihinol A was determined by applying the CD exciton chiral method. Synthesis of kalihinene X, a kalihinane-type diterpenoid, was achieved. This synthesis involves the regioselective coupling reaction of carbanion of alkyl sulfone with epoxyalcohol and construction of cis-decalin by an intramolecular Diels-Alder reaction.
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Affiliation(s)
- Yasuji Yamada
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan.
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Miyaoka H, Yamada Y. Total Synthesis of Bioactive Marine Terpenoids. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2002. [DOI: 10.1246/bcsj.75.203] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
[reaction: see text] An enantioselective formal total synthesis of the sesterterpene (-)-dysidiolide 1 beginning with an intermolecular Diels-Alder reaction of the allene ester 3 and the silyloxydiene 10 is reported.
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Affiliation(s)
- M E Jung
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, USA.
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