1
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Chatterjee B, Mondal D, Bera S. Macrocyclization Strategies Towards the Synthesis of Amphidinolide Natural Products. ASIAN J ORG CHEM 2023. [DOI: 10.1002/ajoc.202200702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Affiliation(s)
- Bhaskar Chatterjee
- Department of Chemistry Nabadwip Vidyasagar College 741302 Nabadwip West Bengal India
| | - Dhananjoy Mondal
- School of Chemical Sciences Central University of Gujarat 382030 Gandhinagar Gujarat (India
| | - Smritilekha Bera
- School of Chemical Sciences Central University of Gujarat 382030 Gandhinagar Gujarat (India
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2
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Paley RS, Hejna BG, Quevedo RE, Wong AR, Dow NW, Murphy JS, Choi S, Yu M, Rablen PR, Pike RD. N-Oxazolidinoyl Diene Iron(0) Tricarbonyl Complexes: Preparation by Diastereoselective Complexation and Synthetic Applications. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert S. Paley
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Benjamin G. Hejna
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Raundi E. Quevedo
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Alice R. Wong
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Nathan W. Dow
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Julia S. Murphy
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Sooyun Choi
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Mason Yu
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Paul R. Rablen
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Robert D. Pike
- Department of Chemistry, William & Mary, P.O. Box 8795, Williamsburg, Virginia 23187, United States
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3
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Fernández-Peña L, Díez-Poza C, González-Andrés P, Barbero A. The Tetrahydrofuran Motif in Polyketide Marine Drugs. Mar Drugs 2022; 20:120. [PMID: 35200649 PMCID: PMC8880653 DOI: 10.3390/md20020120] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 01/20/2022] [Accepted: 02/01/2022] [Indexed: 11/17/2022] Open
Abstract
Oxygen heterocycles are units that are abundant in a great number of marine natural products. Among them, marine polyketides containing tetrahydrofuran rings have attracted great attention within the scientific community due to their challenging structures and promising biological activities. An overview of the most important marine tetrahydrofuran polyketides, with a focused discussion on their isolation, structure determination, approaches to their total synthesis, and biological studies is provided.
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Affiliation(s)
| | | | | | - Asunción Barbero
- Department of Organic Chemistry, Campus Miguel Delibes, University of Valladolid, 47011 Valladolid, Spain; (L.F.-P.); (C.D.-P.); (P.G.-A.)
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4
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Gramani SG, Sriramula RK, Sekar K, Yang EG, Battu P, Kopecky A, Lear MJ. Cis Selective RCM Study to the 14-Membered Cyclic Subunit of Bielschowskysin. J Org Chem 2021; 86:6160-6168. [PMID: 33908786 DOI: 10.1021/acs.joc.0c02984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise, (Z)-selective ring-closing metathesis (RCM) route to the 14-membered carbocycle of bielschowskysin is detailed using naturally occurring chiral starting materials. Unproductive RCM substrates were attributed to alkyne chelation of the ruthenium catalyst and steric disadvantages within the cembranoid precursors, which was eventually circumvented by using cyclic diol benzylidene protection involving a C8-quaternary carbinol center.
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Affiliation(s)
- Subramanian G Gramani
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.,Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Ravi K Sriramula
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Karthik Sekar
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Eugene G Yang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Praveena Battu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Aïcha Kopecky
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Martin J Lear
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.,School of Chemistry, University of Lincoln, Brayford Pool, Lincoln LN6 7TS, U.K
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5
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Mu Y, Zhang T, Cheng Y, Fu W, Wei Z, Chen W, Liu G. Efficient synthesis of tetrahydrofurans with chiral tertiary allylic alcohols catalyzed by Ni/P-chiral ligand DI-BIDIME. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02470h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Efficient nickel-catalyzed stereoselective asymmetric intramolecular reductive cyclization of O-alkynones with P-chiral bisphosphorus ligand DI-BIDIME is reported.
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Affiliation(s)
- Yu Mu
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
| | - Tao Zhang
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
| | - Yaping Cheng
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
| | - Wenzhen Fu
- State Key Laboratory of Bio-organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Zuting Wei
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
| | - Wanjun Chen
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
| | - Guodu Liu
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- China
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6
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Hasenbeck M, Ahles S, Averdunk A, Becker J, Gellrich U. Die Bildung nukleophiler Allylborane aus molekularem Wasserstoff und Allenen katalysiert durch ein Pyridonatboran, das die Reaktivität eines frustrierten Lewis‐Paares zeigt. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011790] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Max Hasenbeck
- Institut für Organische Chemie Justus-Liebig-Universität Gießen Heinrich-Buff-Ring 17 35392 Gießen Deutschland
| | - Sebastian Ahles
- Institut für Organische Chemie Justus-Liebig-Universität Gießen Heinrich-Buff-Ring 17 35392 Gießen Deutschland
| | - Arthur Averdunk
- Institut für Organische Chemie Justus-Liebig-Universität Gießen Heinrich-Buff-Ring 17 35392 Gießen Deutschland
| | - Jonathan Becker
- Institut für Anorganische und Analytische Chemie Justus-Liebig-Universität Gießen Heinrich-Buff-Ring 17 35392 Gießen Deutschland
| | - Urs Gellrich
- Institut für Organische Chemie Justus-Liebig-Universität Gießen Heinrich-Buff-Ring 17 35392 Gießen Deutschland
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7
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Hasenbeck M, Ahles S, Averdunk A, Becker J, Gellrich U. Formation of Nucleophilic Allylboranes from Molecular Hydrogen and Allenes Catalyzed by a Pyridonate Borane that Displays Frustrated Lewis Pair Reactivity. Angew Chem Int Ed Engl 2020; 59:23885-23891. [PMID: 32926511 PMCID: PMC7814673 DOI: 10.1002/anie.202011790] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Indexed: 11/05/2022]
Abstract
Here we report the in situ generation of nucleophilic allylboranes from H2 and allenes mediated by a pyridonate borane that displays frustrated‐Lewis‐pair reactivity. Experimental and computational mechanistic investigations reveal that upon H2 activation, the covalently bound pyridonate substituent becomes a datively bound pyridone ligand. Dissociation of the formed pyridone borane complex liberates Piers borane and enables a hydroboration of the allene. The allylboranes generated in this way are reactive towards nitriles. A catalytic protocol for the formation of allylboranes from H2 and allenes and the allylation of nitriles has been devised. This catalytic reaction is a conceptually new way to use molecular H2 in organic synthesis.
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Affiliation(s)
- Max Hasenbeck
- Institut für Organische Chemie, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392, Gießen, Germany
| | - Sebastian Ahles
- Institut für Organische Chemie, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392, Gießen, Germany
| | - Arthur Averdunk
- Institut für Organische Chemie, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392, Gießen, Germany
| | - Jonathan Becker
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392, Gießen, Germany
| | - Urs Gellrich
- Institut für Organische Chemie, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392, Gießen, Germany
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8
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9
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Wen H, Wang K, Zhang Y, Liu G, Huang Z. Cobalt-Catalyzed Regio- and Enantioselective Markovnikov 1,2-Hydrosilylation of Conjugated Dienes. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04481] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Huanan Wen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Kuan Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Yanlu Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Guixia Liu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Zheng Huang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
- Chang-Kung Chuang Institute, East China Normal University, Shanghai 200062, People’s Republic of China
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10
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Unzue A, Cribiú R, Hoffman MM, Knehans T, Lafleur K, Caflisch A, Nevado C. Iriomoteolides: novel chemical tools to study actin dynamics. Chem Sci 2018; 9:3793-3802. [PMID: 29780512 PMCID: PMC5939837 DOI: 10.1039/c7sc04286h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 03/10/2018] [Indexed: 01/25/2023] Open
Abstract
Despite its promising biological profile, the cellular targets of iriomoteolide-3a, a novel 15-membered macrolide isolated from Amphidinium sp., have remained unknown. A small library of non-natural iriomoteolide-3a analogues is presented here as a result of a novel, highly convergent, catalysis-based scaffold-diversification campaign, which revealed the suitable sites for chemical editing in the original core. We provide compelling experimental evidence for actin as one of iriomoteolides' primary cellular targets, establishing the ability of these secondary metabolites to inhibit cell migration, induce severe morphological changes in cells and cause a reversible cytoplasmic retraction and reduction of F-actin fibers in a time and dose dependent manner. These results are interpreted in light of the ability of iriomoteolides to stabilize F-actin filaments. Molecular dynamics simulations provide evidence for iriomoteolide-3a binding to the barbed end of G-actin. These results showcase iriomoteolides as novel and easily tunable chemical probes for the in vitro study of actin dynamics in the context of cell motility processes including cell invasion and division.
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Affiliation(s)
- A Unzue
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - R Cribiú
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - M M Hoffman
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - T Knehans
- Department of Biochemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - K Lafleur
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - A Caflisch
- Department of Biochemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - C Nevado
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
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11
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Bosch L, Mola L, Petit E, Saladrigas M, Esteban J, Costa AM, Vilarrasa J. Formal Total Synthesis of Amphidinolide E. J Org Chem 2017; 82:11021-11034. [DOI: 10.1021/acs.joc.7b01973] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Lluís Bosch
- Organic Chemistry Section,
Facultat de Química, Universitat de Barcelona, Diagonal
645, 08028 Barcelona, Catalonia, Spain
| | - Laura Mola
- Organic Chemistry Section,
Facultat de Química, Universitat de Barcelona, Diagonal
645, 08028 Barcelona, Catalonia, Spain
| | - Elena Petit
- Organic Chemistry Section,
Facultat de Química, Universitat de Barcelona, Diagonal
645, 08028 Barcelona, Catalonia, Spain
| | - Mar Saladrigas
- Organic Chemistry Section,
Facultat de Química, Universitat de Barcelona, Diagonal
645, 08028 Barcelona, Catalonia, Spain
| | - Jorge Esteban
- Organic Chemistry Section,
Facultat de Química, Universitat de Barcelona, Diagonal
645, 08028 Barcelona, Catalonia, Spain
| | - Anna M. Costa
- Organic Chemistry Section,
Facultat de Química, Universitat de Barcelona, Diagonal
645, 08028 Barcelona, Catalonia, Spain
| | - Jaume Vilarrasa
- Organic Chemistry Section,
Facultat de Química, Universitat de Barcelona, Diagonal
645, 08028 Barcelona, Catalonia, Spain
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12
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Barbier-type anti-Diastereo- and Enantioselective Synthesis of β-Trimethylsilyl, Fluorinated Methyl, Phenylthio Homoallylic Alcohols. Sci Rep 2017; 7:4873. [PMID: 28687768 PMCID: PMC5501818 DOI: 10.1038/s41598-017-04986-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 05/23/2017] [Indexed: 12/20/2022] Open
Abstract
Catalytic Asymmetric allylation of aldehydes with functionalized allylic reagents represents an important process in synthetic organic chemistry because the resulting chiral homoallylic alcohols are valuable building blocks in diverse research fields. Despite the obvious advantages of allyl halides as allylation reagent under Barbier-type conditions, catalytic asymmetric version using functionalized allyl halides remains largely underdeveloped. Here, we addressed this issue by employing a chromium-catalysis system. The use of readily available allyl bromides with γ substitutions including trimethylsilyl, fluorinated methyl and phenylthio groups provided an efficient and convenient method to introduce those privileged functionalities into homoallylic alcohols. Good yields, high anti-diastereo- and excellent enantioselectivities were achieved under mild reaction conditions.
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13
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Lehmann J, Wright MH, Sieber SA. Making a Long Journey Short: Alkyne Functionalization of Natural Product Scaffolds. Chemistry 2016; 22:4666-78. [PMID: 26752308 DOI: 10.1002/chem.201504419] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Indexed: 01/09/2023]
Abstract
Biological selection makes natural products promising scaffolds for drug development and the ever growing number of newly identified, structurally diverse molecules helps to fill the gaps in chemical space. Elucidating the function of a small molecule, such as identifying its protein binding partners, its on- and off-targets, is becoming increasingly important. Activity- and affinity-based protein profiling are modern strategies to acquire such molecular-level information. Introduction of a molecular handle (azide, alkyne, biotin) can shed light on the mode of action of small molecules. This Concept article covers central points on synthetic methodology for integrating a terminal alkyne into a molecule of interest.
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Affiliation(s)
- Johannes Lehmann
- Center for Integrated Protein Science, Munich (CIPSM), Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Megan H Wright
- Center for Integrated Protein Science, Munich (CIPSM), Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Stephan A Sieber
- Center for Integrated Protein Science, Munich (CIPSM), Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany.
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14
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Karabiyikoglu S, Iafe RG, Merlic CA. Ring-Closing Metathesis with Vicinal Dibromoalkenes as Protected Alkynes: A Synthetic Approach to Macrocyclic Enynes. Org Lett 2015; 17:5248-51. [DOI: 10.1021/acs.orglett.5b02595] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Sedef Karabiyikoglu
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Robert G. Iafe
- Department
of Chemistry and Biochemistry, California State University, San Marcos, California 92078, United States
| | - Craig A. Merlic
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
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15
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Zhao K, Loh TP. Asymmetric Conjugate Addition of Grignard Reagents to 3-Silyl Unsaturated Esters for the Facile Preparation of Enantioenriched β-Silylcarbonyl Compounds and Allylic Silanes. Chemistry 2014; 20:16764-72. [DOI: 10.1002/chem.201403849] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Indexed: 12/25/2022]
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16
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Kim D, Lee JS, Lozano L, Kong SB, Han H. Enantioenriched Bifunctional Crotylsilanes for the Asymmetric Synthesis of Orthogonally Protected 2-Methyl-1,3-diols. Org Lett 2013; 15:5142-5. [DOI: 10.1021/ol4026167] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dongeun Kim
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Jae Seung Lee
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Lucia Lozano
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Suk Bin Kong
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Hyunsoo Han
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
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17
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Kamptmann SB, Brückner R. Stereocontrolled Synthesis of a Cn-Cn+7Building Block (“Eastern Moiety”) for the Unnatural Enantiomers of Important Polyol,Polyene Antibiotics Based on a Ring-Closing Metathesis and an Aldol Addition of a Lactone Enolate. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300183] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Mahapatra S, Carter RG. Exploiting hidden symmetry in natural products: total syntheses of amphidinolides C and F. J Am Chem Soc 2013; 135:10792-803. [PMID: 23845005 PMCID: PMC3786714 DOI: 10.1021/ja404796n] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The total synthesis of amphidinolide C and a second-generation synthesis of amphidinolide F have been accomplished through the use of a common intermediate to access both the C1-C8 and the C18-C25 sections. The development of a Ag-catalyzed cyclization of a propargyl benzoate diol is described to access both trans-tetrahydrofuran rings. The evolution of a Felkin-controlled, 2-lithio-1,3-dienyl addition strategy to incorporate C9-C11 diene as well as C8 stereocenter is detailed. Key controlling aspects in the sulfone alkylation/oxidative desulfurization to join the major subunits, including the exploration of the optimum masking group for the C18 carbonyl motif, are discussed. A Trost asymmetric alkynylation and a stereoselective cuprate addition to an alkynoate have been developed for the rapid construction of the C26-C34 subunit. A Tamura/Vedejs olefination to introduce the C26 side arm of amphidnolides C and F is employed. The late-stage incorporation of the C15, C18 diketone motif proved critical to the successful competition of the total syntheses.
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Affiliation(s)
- Subham Mahapatra
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, USA
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19
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Chen M, Roush WR. Enantioselective synthesis of (Z)- and (E)-2-methyl-1,5-anti-pentenediols via an allene hydroboration-double-allylboration reaction sequence. J Am Chem Soc 2013; 135:9512-7. [PMID: 23758559 PMCID: PMC3733567 DOI: 10.1021/ja4033633] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Kinetically controlled hydroboration of allenylboronate 5 followed by double allylboration with the resulting allylborane (Z)-7 gave (Z)-2-methyl-1,5-anti-pentenediols 6 in good yield and high enantioselectivity in the presence of 10% BF3·OEt2 as the catalyst in the second allylboration step. Under thermodynamically controlled isomerization conditions, (Z)-7 can readily isomerize to (E)-7. Double allylboration of representative aldehydes with allylborane (E)-7 gave (E)-2-methyl-1,5-anti-pentenediols 4 in good yield and high enantioselectivity without requiring use of the BF3·OEt2 catalyst. Thus, 2-methyl-1,5-anti-pentenediols with either olefin geometry can be synthesized from the same allenylboronate precursor 5. Furthermore, 1,5-pentenediols 4 and 6 can be easily converted to 1,3,5-triols with excellent diastereoselectivity in one step.
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Affiliation(s)
- Ming Chen
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458
| | - William R. Roush
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458
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20
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Lorente A, Lamariano-Merketegi J, Albericio F, Álvarez M. Tetrahydrofuran-containing macrolides: a fascinating gift from the deep sea. Chem Rev 2013; 113:4567-610. [PMID: 23506053 DOI: 10.1021/cr3004778] [Citation(s) in RCA: 250] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adriana Lorente
- Institute for Research in Biomedicine, Barcelona Science Park, University of Barcelona, Baldiri Reixac 10, 08028 Barcelona, Spain
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21
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Lu L, Zhang W, Nam S, Horne DA, Jove R, Carter RG. Amphidinolide B: total synthesis, structural investigation, and biological evaluation. J Org Chem 2013; 78:2213-47. [PMID: 23406192 PMCID: PMC3631602 DOI: 10.1021/jo3026077] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total syntheses of amphidinolide B1 and the proposed structure of amphidinolide B2 have been accomplished. Key aspects of this work include the development of a practical, non-transition-metal-mediated method for the construction of the C13-C15 diene, the identification of α-chelation and dipole minimization models for diastereoselective methyl ketone aldol reactions, the discovery of a spontaneous Horner-Wadsworth-Emmons macrocyclization strategy, and the development of a novel late stage method for construction of an allylic epoxide moiety. The originally proposed structure for amphidinolide B2 and diastereomers thereof display potent antitumor activities with IC50 values ranging from 3.3 to 94.5 nM against human solid and blood tumor cells. Of the different stereoisomers, the proposed structure of amphidinolide B2 is over 12-fold more potent than the C8,9-epimer and C18-epimer in human DU145 prostate cancer cells. These data suggest that the epoxide stereochemistry is a significant factor for anticancer activity.
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Affiliation(s)
- Liang Lu
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
| | - Wei Zhang
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
| | - Sangkil Nam
- Department of Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - David A. Horne
- Department of Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Richard Jove
- Department of Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Rich G. Carter
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
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22
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Macé A, Tripoteau F, Zhao Q, Gayon E, Vrancken E, Campagne JM, Carboni B. Tandem reactions involving 1-silyl-3-boryl-2-alkenes. New access to (Z)-1-fluoro-1-alkenes, allyl fluorides, and diversely α-substituted allylboronates. Org Lett 2013; 15:906-9. [PMID: 23391173 DOI: 10.1021/ol4000263] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactions of 1-silyl-3-boryl-2-alkenes with various electrophilic reagents (Selectfluor, N-halosuccinimides, benzhydryl, and propargylic alcohols in the presence of a Lewis acid, N-alkoxycarbonyliminium ion) have been investigated as new routes to α-substituted allylboronates. Further functional transformations, including allylboration, Suzuki coupling, protodeboronation, and cycloisomerization, have been carried out to illustrate the synthetic potential of these γ-borylallylsilanes.
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Affiliation(s)
- Aurélie Macé
- Institut des Sciences Chimiques de Rennes, UMR 6626 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
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23
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Molinski TF, Morinaka BI. INTEGRATED APPROACHES TO THE CONFIGURATIONAL ASSIGNMENT OF MARINE NATURAL PRODUCTS. Tetrahedron 2012; 68:9307-9343. [PMID: 23814320 PMCID: PMC3694619 DOI: 10.1016/j.tet.2011.12.070] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Tadeusz F. Molinski
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive MC0358, La Jolla, CA, 92093
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive MC0358, La Jolla, CA, 92093
| | - Brandon I. Morinaka
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive MC0358, La Jolla, CA, 92093
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24
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25
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Selective Alkene Metathesis in the Total Synthesis of Complex Natural Product. Top Curr Chem (Cham) 2012; 327:163-96. [DOI: 10.1007/128_2012_318] [Citation(s) in RCA: 10] [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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26
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Volchkov I, Park S, Lee D. Ring strain-promoted allylic transposition of cyclic silyl ethers. Org Lett 2011; 13:3530-3. [PMID: 21648455 DOI: 10.1021/ol2013473] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Relief of the ring strain of medium-sized rings promotes a regioselective allylic transposition of a C-O bond when catalyzed by rhenium oxide. Through the allylic transposition, eight-membered cyclic silyl ethers undergo ring contraction to the corresponding six-membered siloxacycles.
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Affiliation(s)
- Ivan Volchkov
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, USA
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27
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Zhang JT, Qi XL, Chen J, Li BS, Zhou YB, Cao XP. Total Synthesis of Malyngamides K, L, and 5′′-epi-C and Absolute Configuration of Malyngamide L. J Org Chem 2011; 76:3946-59. [DOI: 10.1021/jo2003852] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jun-Tao Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Xian-Liang Qi
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Jie Chen
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Bao-Sheng Li
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - You-Bai Zhou
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Xiao-Ping Cao
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People's Republic of China
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28
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Fürstner A. From Total Synthesis to Diverted Total Synthesis: Case Studies in the Amphidinolide Series. Isr J Chem 2011. [DOI: 10.1002/ijch.201100006] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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29
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Chen M, Roush WR. Enantioselective syntheses of syn- and anti-β-hydroxyallylsilanes via allene hydroboration-aldehyde allylboration reactions. Org Lett 2011; 13:1992-5. [PMID: 21410173 DOI: 10.1021/ol200392u] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The kinetic hydroboration of allenylsilane 5 with ((d)Ipc)(2)BH at -40 °C provides allylborane 9Z with ≥12:1 selectivity. When the hydroboration is performed at temperatures above -40 °C, 9Z isomerizes to the thermodynamically more stable allylborane 9E with >20:1 selectivity. Subsequent treatment of 9Z or 9E with aldehydes at -78 °C provides syn- or anti-β-hydroxyallylsilanes, 7 or 8, respectively.
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Affiliation(s)
- Ming Chen
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, USA
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30
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Schmidt B, Staude L. Desymmetrization of (R,R)-Hexa-1,5-diene-3,4-diol via Monofunctionalization and Rhodium-Catalyzed Allylic Substitution. J Org Chem 2011; 76:2220-6. [DOI: 10.1021/jo2001337] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Bernd Schmidt
- Institut fuer Chemie (Organische Synthesechemie), Universitaet Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam-Golm, Germany
| | - Lucia Staude
- Institut fuer Chemie (Organische Synthesechemie), Universitaet Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam-Golm, Germany
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31
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Schmidt B, Staude L, Kelling A, Schilde U. A Cross-Metathesis-Conjugate Addition Route to Enantiopure γ-Butyrolactams and γ-Lactones from a C2-Symmetric Precursor. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001528] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Han SB, Gao X, Krische MJ. Iridium-catalyzed anti-diastereo- and enantioselective carbonyl (trimethylsilyl)allylation from the alcohol or aldehyde oxidation level. J Am Chem Soc 2010; 132:9153-6. [PMID: 20540509 DOI: 10.1021/ja103299f] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Using the ortho-cyclometalated pi-allyl iridium precatalyst (R)-I derived from [Ir(cod)Cl](2), 4-cyano-3-nitrobenzoic acid, (R)-SEGPHOS, and allyl acetate, enantioselective transfer hydrogenation of alpha-(trimethylsilyl)allyl acetate in the presence of aldehydes 2a-i mediated by 2-propanol delivers products of (trimethylsilyl)allylation 4a-i in good isolated yields and with exceptional levels of anti-diastereoselectivity and enantioselectivity (90-99% ee). In the absence of 2-propanol, but under otherwise identical reaction conditions, carbonyl (trimethylsilyl)allylation is achieved directly from the alcohol oxidation level to furnish an equivalent set of adducts 4a-i with roughly equivalent isolated yields and stereoselectivities. To evaluate the synthetic utility of the reaction products 4a-i, adduct 4g was converted to the 1,4-ene-diol 5g via dioxirane-mediated oxidative desilylation with allylic transposition, the allylic alcohol 6g via protodesilylation with allylic transposition, and the gamma-lactam 7g via chlorosulfonyl isocyanate-mediated cycloaddition.
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Affiliation(s)
- Soo Bong Han
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712, USA
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33
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Binanzer M, Fang G, Aggarwal V. Asymmetric Synthesis of Allylsilanes by the Borylation of Lithiated Carbamates: Formal Total Synthesis of (−)-Decarestrictine D. Angew Chem Int Ed Engl 2010; 49:4264-8. [DOI: 10.1002/anie.201001223] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Binanzer M, Fang G, Aggarwal V. Asymmetric Synthesis of Allylsilanes by the Borylation of Lithiated Carbamates: Formal Total Synthesis of (−)-Decarestrictine D. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201001223] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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35
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Affiliation(s)
- Bernd Schmidt
- Institut fuer Chemie, Organische Synthesechemie, Universitaet Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Golm, Germany
| | - Oliver Kunz
- Institut fuer Chemie, Organische Synthesechemie, Universitaet Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Golm, Germany
| | - Anne Biernat
- Institut fuer Chemie, Organische Synthesechemie, Universitaet Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Golm, Germany
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36
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Cribiú R, Jäger C, Nevado C. Syntheses and biological evaluation of iriomoteolide 3a and analogues. Angew Chem Int Ed Engl 2010; 48:8780-3. [PMID: 19813232 DOI: 10.1002/anie.200903379] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Riccardo Cribiú
- Organic Chemistry Institute, Universität Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
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37
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Schmidt AW, Olpp T, Baum E, Stiffel T, Knölker HJ. Organosilicon-mediated total synthesis of the triquinane sesquiterpenes (±)-β-isocomene and (±)-isocomene. Org Biomol Chem 2010; 8:4562-8. [DOI: 10.1039/c0ob00051e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Habrant D, Rauhala V, Koskinen AMP. Conversion of carbonyl compounds to alkynes: general overview and recent developments. Chem Soc Rev 2010; 39:2007-17. [DOI: 10.1039/b915418c] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Cribiú R, Jäger C, Nevado C. Synthese und biologische Evaluierung von Iriomoteolid-3a und seinen Analoga. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903379] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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40
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Wilkinson S, Lozano O, Schuler M, Pacheco M, Salmon R, Gouverneur V. Electrophilic Fluorocyclization of Allyl Silanes. Angew Chem Int Ed Engl 2009; 48:7083-6. [DOI: 10.1002/anie.200901795] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Wilkinson S, Lozano O, Schuler M, Pacheco M, Salmon R, Gouverneur V. Electrophilic Fluorocyclization of Allyl Silanes. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200901795] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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42
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Donaldson WA, Chaudhury S. Recent Applications of Acyclic (Diene)iron Complexes and (Dienyl)iron Cations in Organic Synthesis. European J Org Chem 2009; 2009:3831-3843. [PMID: 21709767 DOI: 10.1002/ejoc.200900141] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Complexation of (tricarbonyl)iron to an acyclic diene serves to protect the ligand against oxidation, reduction and cycloaddition reactions while the steric bulk of this adjunct serves to direct the approach reagents to unsaturated groups attached to the diene onto the face opposite to iron. Furthermore, the Fe(CO)(3) moiety can serve to stabilize carbocation centers adjacent to the diene (i.e. pentadienyl-iron cations). Recent applications of these reactivities to the synthesis of polyene, cyclopropane, cycloheptadiene and cyclohexenone containing natural products or analogs will be presented.
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Affiliation(s)
- William A Donaldson
- Department of Chemistry, Marquette University, P. O. Box 1881, Milwaukee, WI 53201-1881 USA
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43
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Fürstner A, Flügge S, Larionov O, Takahashi Y, Kubota T, Kobayashi J. Total synthesis and biological evaluation of amphidinolide V and analogues. Chemistry 2009; 15:4011-29. [PMID: 19241434 DOI: 10.1002/chem.200802068] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The awesome power of metathesis is illustrated by a concise synthesis of the extremely scarce marine natural product amphidinolide V, which hinges on a sequence of ring-closing alkyne metathesis followed by intermolecular enyne metathesis with ethylene (see scheme). As a complete set of conceivable stereoisomers was prepared, the constitution and absolute configuration of this macrolide could be established and first insights into structure-activity relationships governing its cytotoxicity were obtained.A sequence of ring-closing alkyne metathesis followed by an intermolecular enyne metathesis of the resulting cycloalkyne with ethene was used to forge the macrocyclic skeleton and to set the vicinal exo-methylene branches characteristic for the cytotoxic marine natural product amphidinolide V (1). Comparison of the synthetic material with an authentic sample of this extremely scarce metabolite isolated from a dinoflagellate of the Amphidinium sp. eliminated any doubts about its structure and allowed the absolute configuration of amphidinolide V to be determined as 8R,9S,10S,13R. Moreover, the flexibility inherent to the underlying synthesis blueprint also opened access to a comprehensive set of diastereomers of 1 as well as to synthetic analogues differing from the natural lead in the lipophilic chains appended to the macrocyclic core. This set of designed analogues gave first insights into structure-activity relationships, which revealed that the stereostructure of the macrolactone is a highly critical parameter, whereas the examined alterations of the side chain did not diminish the cytotoxicity of the compounds to any notable extent.
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Affiliation(s)
- Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
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44
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Fürstner A, Kattnig E, Kelter G, Fiebig HH. Molecular Editing and Biological Evaluation of Amphidinolide X and Y. Chemistry 2009; 15:4030-43. [DOI: 10.1002/chem.200802069] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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45
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Total Syntheses of Amphidinolides B1, B4, G1, H1 and Structure Revision of Amphidinolide H2. Chemistry 2009; 15:3983-4010. [DOI: 10.1002/chem.200802067] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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46
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Blunt JW, Copp BR, Hu WP, Munro MHG, Northcote PT, Prinsep MR. Marine natural products. Nat Prod Rep 2009; 26:170-244. [PMID: 19177222 DOI: 10.1039/b805113p] [Citation(s) in RCA: 408] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review covers the literature published in 2007 for marine natural products, with 948 citations(627 for the period January to December 2007) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, cnidarians,bryozoans, molluscs, tunicates, echinoderms and true mangrove plants. The emphasis is on new compounds (961 for 2007), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.1 Introduction, 2 Reviews, 3 Marine microorganisms and phytoplankton, 4 Green algae, 5 Brown algae, 6 Red algae, 7 Sponges, 8 Cnidarians, 9 Bryozoans, 10 Molluscs, 11 Tunicates (ascidians),12 Echinoderms, 13 Miscellaneous, 14 Conclusion, 15 References.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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47
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Tang B, Bray CD, Pattenden G. Total synthesis of (+)-intricarene using a biogenetically patterned pathway from (−)-bipinnatin J, involving a novel transannular [5+2] (1,3-dipolar) cycloaddition. Org Biomol Chem 2009; 7:4448-57. [DOI: 10.1039/b910572g] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Ito F, Kumamoto T, Yamaguchi K, Ishikawa T. Synthetic studies toward miroestrols: trials for elongation of the methyl group of 5-substituted 2-methyl-2-cyclohexanone to 3-methyl-2-butenyl function. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.11.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Kim CH, An HJ, Shin WK, Yu W, Woo SK, Jung SK, Lee E. Stereoselective synthesis of (-)-amphidinolide E. Chem Asian J 2008; 3:1523-34. [PMID: 18604821 DOI: 10.1002/asia.200800062] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The total synthesis of (-)-amphidinolide E was accomplished by following a synthetic scheme that incorporates the labile C2 stereocenter at a very late stage. The oxolane unit was prepared by beta-alkoxyacrylate radical cyclization. The enyne metathesis reaction was employed for the synthesis of the side chain. The Kocienski-Julia reaction was used for the union of the two major fragments, and the Kita macrolactonization protocol was used for macrolide synthesis.
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Affiliation(s)
- Chan Hyuk Kim
- Department of Chemistry, Seoul National University, Seoul 151-747, Korea
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50
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Abstract
The key C10-C26 fragment in a total synthesis of (-)-amphidinolide E has been prepared from an oxolane-containing C10-C17 segment (9, derived from L-glutamic acid) via a Julia-Kocienski reaction with aldehyde 3, followed by a Sharpless AD to obtain the desired diol. The C22-C26 fragment was installed by means of an efficient Suzuki-Molander coupling, with an organotrifluoroborate reagent (4, arising from a cross-metathesis reaction between a vinylboronate and 2-methyl-1,4-pentadiene).
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Affiliation(s)
- Jorge Esteban
- Departament de Química Orgànica, Facultat de Química, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona, Catalonia, Spain
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