1
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Xu Z, Li X, Rose JA, Herzon SB. Finding activity through rigidity: syntheses of natural products containing tricyclic bridgehead carbon centers. Nat Prod Rep 2023; 40:1393-1431. [PMID: 37140079 PMCID: PMC10472132 DOI: 10.1039/d3np00008g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Covering: up to 2022Tricyclic bridgehead carbon centers (TBCCs) are a synthetically challenging substructure found in many complex natural products. Here we review the syntheses of ten representative families of TBCC-containing isolates, with the goal of outlining the strategies and tactics used to install these centers, including a discussion of the evolution of the successful synthetic design. We provide a summary of common strategies to inform future synthetic endeavors.
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Affiliation(s)
- Zhi Xu
- Department of Chemistry, Yale University, New Haven, Connecticut, 06520, USA.
| | - Xin Li
- Department of Chemistry, Yale University, New Haven, Connecticut, 06520, USA.
| | - John A Rose
- Department of Chemistry, Yale University, New Haven, Connecticut, 06520, USA.
| | - Seth B Herzon
- Department of Chemistry, Yale University, New Haven, Connecticut, 06520, USA.
- Departments of Pharmacology and Therapeutic Radiology, Yale School of Medicine, New Haven, Connecticut, 06520, USA
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2
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Hui C, Craggs L, Antonchick AP. Ring contraction in synthesis of functionalized carbocycles. Chem Soc Rev 2022; 51:8652-8675. [PMID: 36172989 DOI: 10.1039/d1cs01080h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbocycles are a key and widely present structural motif in organic compounds. The construction of structurally intriguing carbocycles, such as highly-strained fused rings, spirocycles or highly-functionalized carbocycles with congested stereocenters, remains challenging in organic chemistry. Cyclopropanes, cyclobutanes and cyclopentanes within such carbocycles can be synthesized through ring contraction. These ring contractions involve re-arrangement of and/or small molecule extrusion from a parental ring, which is either a carbocycle or a heterocycle of larger size. This review provides an overview of synthetic methods for ring contractions to form cyclopropanes, cyclobutanes and cyclopentanes en route to structurally intriguing carbocycles.
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Affiliation(s)
- Chunngai Hui
- Max Planck Institute of Molecular Physiology, Department of Chemical Biology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany. .,Technical University Dortmund, Faculty of Chemistry and Chemical Biology, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Luke Craggs
- Nottingham Trent University, School of Science and Technology, Department of Chemistry and Forensics, Clifton Lane, NG11 8NS Nottingham, UK
| | - Andrey P Antonchick
- Max Planck Institute of Molecular Physiology, Department of Chemical Biology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany. .,Technical University Dortmund, Faculty of Chemistry and Chemical Biology, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany.,Nottingham Trent University, School of Science and Technology, Department of Chemistry and Forensics, Clifton Lane, NG11 8NS Nottingham, UK
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3
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Shi L, He Y, Gong J, Yang Z. Concise gram-scale synthesis of Euphorikanin A skeleton through a domino ring-closing metathesis strategy. Chem Commun (Camb) 2019; 56:531-534. [PMID: 31829345 DOI: 10.1039/c9cc08830j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Euphorikanin A is a diterpenoid possessing a highly congested and unprecedented 5/6/7/3-fused tetracyclic ring skeleton. To access the challenging chemical structure of Euphorikanins, an efficient total synthetic approach is described. The stereoselective synthesis of the core structure of Euphorikanin A has been achieved from a simple dienyne building block, and a domino ring-closing metathesis (RCM) strategy was used for the gram-scale synthesis of the highly strained Euphorikanin A core. This paves the way for the synthesis of structurally diverse Euphorikanins.
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Affiliation(s)
- Linlin Shi
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| | - Yingdong He
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| | - Jianxian Gong
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, China. and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), College of Chemistry, and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
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4
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Brill ZG, Condakes ML, Ting CP, Maimone TJ. Navigating the Chiral Pool in the Total Synthesis of Complex Terpene Natural Products. Chem Rev 2017; 117:11753-11795. [PMID: 28293944 PMCID: PMC5638449 DOI: 10.1021/acs.chemrev.6b00834] [Citation(s) in RCA: 186] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The pool of abundant chiral terpene building blocks (i.e., "chiral pool terpenes") has long served as a starting point for the chemical synthesis of complex natural products, including many terpenes themselves. As inexpensive and versatile starting materials, such compounds continue to influence modern synthetic chemistry. This review highlights 21st century terpene total syntheses which themselves use small, terpene-derived materials as building blocks. An outlook to the future of research in this area is highlighted as well.
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Affiliation(s)
- Zachary G. Brill
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| | - Matthew L. Condakes
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| | - Chi P. Ting
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| | - Thomas J. Maimone
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
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5
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Allred TK, Manoni F, Harran PG. Exploring the Boundaries of “Practical”: De Novo Syntheses of Complex Natural Product-Based Drug Candidates. Chem Rev 2017; 117:11994-12051. [DOI: 10.1021/acs.chemrev.7b00126] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tyler K. Allred
- Department of Chemistry and
Biochemistry, University of California−Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095-1569, United States
| | - Francesco Manoni
- Department of Chemistry and
Biochemistry, University of California−Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095-1569, United States
| | - Patrick G. Harran
- Department of Chemistry and
Biochemistry, University of California−Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095-1569, United States
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6
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Kärkäs M, Porco JA, Stephenson CRJ. Photochemical Approaches to Complex Chemotypes: Applications in Natural Product Synthesis. Chem Rev 2016; 116:9683-747. [PMID: 27120289 PMCID: PMC5025835 DOI: 10.1021/acs.chemrev.5b00760] [Citation(s) in RCA: 665] [Impact Index Per Article: 83.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Indexed: 01/29/2023]
Abstract
The use of photochemical transformations is a powerful strategy that allows for the formation of a high degree of molecular complexity from relatively simple building blocks in a single step. A central feature of all light-promoted transformations is the involvement of electronically excited states, generated upon absorption of photons. This produces transient reactive intermediates and significantly alters the reactivity of a chemical compound. The input of energy provided by light thus offers a means to produce strained and unique target compounds that cannot be assembled using thermal protocols. This review aims at highlighting photochemical transformations as a tool for rapidly accessing structurally and stereochemically diverse scaffolds. Synthetic designs based on photochemical transformations have the potential to afford complex polycyclic carbon skeletons with impressive efficiency, which are of high value in total synthesis.
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Affiliation(s)
- Markus
D. Kärkäs
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - John A. Porco
- Department
of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Corey R. J. Stephenson
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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7
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Ohyoshi T, Tamura Y, Hayakawa I, Hirai G, Miyazawa Y, Funakubo S, Sodeoka M, Kigoshi H. Total synthesis of natural derivatives and artificial analogs of 13-oxyingenol and their biological evaluation. Org Biomol Chem 2016; 14:11426-11437. [DOI: 10.1039/c6ob02268e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Natural derivatives and artificial analogs of 13-oxyingenol were synthesized, and these analogs induced HL-60 differentiation and apoptosis.
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Affiliation(s)
- Takayuki Ohyoshi
- Department of Chemistry
- Graduate School of Pure and Applied Sciences
- University of Tsukuba
- Tsukuba 305-8571
- Japan
| | - Yuki Tamura
- Synthetic Organic Chemistry Laboratory
- Wako
- Japan
| | - Ichiro Hayakawa
- Division of Applied Chemistry
- Graduate School of Natural Science and Technology
- Okayama University
- Okayama 700-8530
- Japan
| | - Go Hirai
- Synthetic Organic Chemistry Laboratory
- Wako
- Japan
- RIKEN Center for Sustainable Resource Science
- Wako
| | - Yamato Miyazawa
- Department of Chemistry
- Graduate School of Pure and Applied Sciences
- University of Tsukuba
- Tsukuba 305-8571
- Japan
| | - Shota Funakubo
- Department of Chemistry
- Graduate School of Pure and Applied Sciences
- University of Tsukuba
- Tsukuba 305-8571
- Japan
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry Laboratory
- Wako
- Japan
- RIKEN Center for Sustainable Resource Science
- Wako
| | - Hideo Kigoshi
- Department of Chemistry
- Graduate School of Pure and Applied Sciences
- University of Tsukuba
- Tsukuba 305-8571
- Japan
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8
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Abstract
Despite a more recent isolation and chemical characterization when compared to phorbol, along with its chemical instability, limited distribution in Nature, and scarce availability, ingenol is the only Euphorbia diterpenoid that has undergone successful pharmaceutical development, with ingenol 3-angelate (ingenol mebutate, Picato(®)) entering the pharmaceutical market in 2012 for the treatment of actinic keratosis. The phytochemical, chemical, and biological literature on members of the ingenane class of diterpenoids is reviewed from their first isolation in 1968 through 2015, highlighting unresolved issues both common to phorboids (biogenesis, relationship between molecular targets, and in vivo activity) and specific to ingenol derivatives (two-dimensional representation, in-out stereoisomerism, versatility of binding mode to PKC, and inconsistencies in the structural elucidation of some classes of derivatives). The biogenesis of ingenol is discussed in the light of the Jakupovic proposal of a dissection between the formation of the macrocyclic Euphorbia diterpenoids and the phorboids, and the clinical development of ingenol mebutate is chronicled in the light of its "reverse-pharmacology" focus.
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Affiliation(s)
- Giovanni Appendino
- Dipartimento di Scienze del Farmaco, Largo Donegani 2, 28100, Novara, Italy.
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9
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Hanson JR. Chiral Cyclic Synthetic Intermediates from Readily Available Monoterpenoids. JOURNAL OF CHEMICAL RESEARCH 2015. [DOI: 10.3184/174751915x14471674408987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The preparation of some chiral cyclic synthetic intermediates from car-3-ene, linalool, limonene, α-pinene and camphor, is reviewed. Some applications of these intermediates are described.
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Affiliation(s)
- James R. Hanson
- Department of Chemistry, University of Sussex, Brighton, Sussex BNl 9QJ, UK
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10
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Ishmuratov GY, Yakovleva MP, Shutova MA, Muslukhov RR, Ishmuratova NM, Tolstikov AG. Synthetic Approaches to Optically Active Macrolides Containing Hydrazide Fragments of L-(+)-Tartaric Acid from (+)-3-Carene, (+)-α-Pinene, and S-(–)-Limonene. Chem Nat Compd 2014. [DOI: 10.1007/s10600-014-1046-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Plummer CW, Wei CS, Yozwiak CE, Soheili A, Smithback SO, Leighton JL. Design, Development, Mechanistic Elucidation, and Rational Optimization of a Tandem Ireland Claisen/Cope Rearrangement Reaction for Rapid Access to the (Iso)Cyclocitrinol Core. J Am Chem Soc 2014; 136:9878-81. [DOI: 10.1021/ja505131v] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Carolyn S. Wei
- Department of Chemistry, Columbia University, NewYork, New York 10027, United States
| | - Carrie E. Yozwiak
- Department of Chemistry, Columbia University, NewYork, New York 10027, United States
| | - Arash Soheili
- Department of Chemistry, Columbia University, NewYork, New York 10027, United States
| | - Sara O. Smithback
- Department of Chemistry, Columbia University, NewYork, New York 10027, United States
| | - James L. Leighton
- Department of Chemistry, Columbia University, NewYork, New York 10027, United States
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12
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Hayakawa I. Development of Biofunctional Molecules Based on Total Synthesis of Natural Products. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Chuang CN, Chuang LW, Yeh MCP. Transition Metal Cation Salts in Organic Synthesis. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.199500096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Parenty A, Moreau X, Niel G, Campagne JM. Update 1 of: Macrolactonizations in the Total Synthesis of Natural Products. Chem Rev 2013; 113:PR1-40. [DOI: 10.1021/cr300129n] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- A. Parenty
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
| | - X. Moreau
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - Gilles Niel
- Institut Charles Gerhardt, UMR5253, Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier, France
| | - J.-M. Campagne
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
- Institut Charles Gerhardt, UMR5253, Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier, France
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15
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Ohyoshi T, Funakubo S, Miyazawa Y, Niida K, Hayakawa I, Kigoshi H. Total Synthesis of (−)-13-Oxyingenol and its Natural Derivative. Angew Chem Int Ed Engl 2012; 51:4972-5. [DOI: 10.1002/anie.201201383] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Indexed: 11/08/2022]
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16
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Ohyoshi T, Funakubo S, Miyazawa Y, Niida K, Hayakawa I, Kigoshi H. Total Synthesis of (−)-13-Oxyingenol and its Natural Derivative. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201383] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Ohyoshi T, Miyazawa Y, Aoki K, Ohmura S, Asuma Y, Hayakawa I, Kigoshi H. Synthetic Studies toward 13-Oxyingenol: Construction of the Fully Substituted Tetracyclic Compound. Org Lett 2011; 13:2160-3. [DOI: 10.1021/ol103151k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takayuki Ohyoshi
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan
| | - Yamato Miyazawa
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan
| | - Kenta Aoki
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan
| | - Satomi Ohmura
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan
| | - Yuki Asuma
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan
| | - Ichiro Hayakawa
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan
| | - Hideo Kigoshi
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan
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18
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Busch T, Kirschning A. Recent advances in the total synthesis of pharmaceutically relevant diterpenes. Nat Prod Rep 2008; 25:318-41. [DOI: 10.1039/b705652b] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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20
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Abstract
Terpenes represent one of the largest and most diverse classes of secondary metabolites, with over 55,000 members isolated to date. The terpene cyclase enzymes used in nature convert simple, linear hydrocarbon phosphates into an exotic array of chiral, carbocyclic skeletons. Further oxidation and rearrangement results in an almost endless number of conceivable structures. The enormous structural diversity presented by this class of natural products ensures a broad range of biological properties-ranging from anti-cancer and anti-malarial activities to tumor promotion and ion-channel binding. The marked structural differences of terpenes also largely thwart the development of any truly general strategies for their synthetic construction. This review focuses on synthetic strategies directed toward some of the most complex, biologically relevant terpenes prepared by total synthesis within the past decade. Of crucial importance are both the obstacles that modern synthetic chemists must confront when trying to construct such natural products and the key chemical transformations and strategies that have been developed to meet these challenges.
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Affiliation(s)
- Thomas J Maimone
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, USA
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21
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Parenty A, Moreau X, Campagne JM. Macrolactonizations in the total synthesis of natural products. Chem Rev 2006; 106:911-39. [PMID: 16522013 DOI: 10.1021/cr0301402] [Citation(s) in RCA: 378] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A Parenty
- Institut de Chimie des Substances Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
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22
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Affiliation(s)
- Isao Kuwajima
- Kitasato Institute for Life Science, Kitasato University, Sagamihara, Kanagawa, Japan
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23
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24
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Affiliation(s)
- Oleg L Epstein
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA
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25
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26
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Rigby JH, Bazin B, Meyer JH, Mohammadi F. Synthetic studies on the ingenane diterpenes. An improved entry into a trans-intrabridgehead system. Org Lett 2002; 4:799-801. [PMID: 11869131 DOI: 10.1021/ol017280n] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] The efficient construction of an ingenol intermediate exhibiting "insideminus signoutside" intrabridgehead stereochemistry is reported. The sequence features the net conversion of a cis-intrabridgehead compound into a highly strained trans-species via palladium-mediated isomerization of an allylic epoxide followed by a low-temperature alkoxide-accelerated 1,5-hydrogen migration.
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Affiliation(s)
- James H Rigby
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202-3489, USA.
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27
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Tang H, Yusuff N, Wood JL. Progress toward the total synthesis of ingenol: construction of the complete carbocyclic skeleton. Org Lett 2001; 3:1563-6. [PMID: 11388867 DOI: 10.1021/ol015855a] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] The complete carbocyclic skeleton of ingenol is assembled via a route that employs ring-closing metathesis (RCM) to close the strained "inside-outside" BC ring system (i.e., 24 --> 25).
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Affiliation(s)
- H Tang
- Sterling Chemistry Laboratory, Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, USA
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28
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Paquette LA, Gallou F, Zhao Z, Young DG, Liu J, Yang J, Friedrich D. Propensity of 4-Methoxy-4-vinyl-2-cyclopentenones Housed in Tri- and Tetracyclic Frameworks for Deep-Seated Photochemical Rearrangement. J Am Chem Soc 2000. [DOI: 10.1021/ja001813q] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Leo A. Paquette
- Contribution from the Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
| | - Fabrice Gallou
- Contribution from the Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
| | - Zhong Zhao
- Contribution from the Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
| | - David G. Young
- Contribution from the Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
| | - Jian Liu
- Contribution from the Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
| | - Jiong Yang
- Contribution from the Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
| | - Dirk Friedrich
- Contribution from the Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
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29
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Frank SA, Works AB, Roush WR. Studies on the synthesis of the decahydro-as-indacene ring system of (-)-spinosyn A via transannular Diels-Alder reactions of substituted (E,E,E)-cyclododeca-1,6,8-trienes. CAN J CHEM 2000. [DOI: 10.1139/v00-045] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Stereoselective syntheses of decahydro-as-indacenes 31 and 54 are reported. The key features of our syntheses of 31 and 54 are the tandem Ireland-Claisen ring contraction of lactones 29 and 38 followed by the transannular Diels-Alder cyclization of cyclododecatrienes 30 and 35. Transition state modeling of both the transannular Diels-Alder reaction and the Ireland-Claisen ring contraction using PCModel is also described.Key words: transannular Diels-Alder reactions, tandem reactions, Claisen ring contraction, Spinosyn A, synthetic study.
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30
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Kigoshi H, Suzuki Y, Aoki K, Uemura D. Synthetic studies of ingenol: synthesis of in,out-tricyclo[7.4.1.01,5]tetradecan-14-one. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)00519-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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31
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Affiliation(s)
- Masaharu Nakamura
- Department of Chemistry, The University of Tokyo Hongo, Bunkyo-ku, 113-0033, Japan
| | - Atsushi Hirai
- Department of Chemistry, The University of Tokyo Hongo, Bunkyo-ku, 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo Hongo, Bunkyo-ku, 113-0033, Japan
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32
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Molander GA, Bessières B, Eastwood PR, Noll BC. Synthesis of Cyclic Bis(trimethysilyl) Enol Ethers and Their [3 + 4] and [3 + 5] Annulation Reactions with Dicarbonyl Electrophiles. Access to Highly Functionalized Tricyclic Ethers Possessing Trans Intrabridgehead Stereochemistry. J Org Chem 1999. [DOI: 10.1021/jo9902547] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gary A. Molander
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado, 80309-0215
| | - Bernard Bessières
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado, 80309-0215
| | - Paul R. Eastwood
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado, 80309-0215
| | - Bruce C. Noll
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado, 80309-0215
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The synthesis of seven-membered rings: General strategies and the design and development of a new class of cycloaddition reactions. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s1052-2077(99)80003-1] [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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Rigby JH, Hu J, Heeg MJ. Synthetic studies on the ingenane diterpenes. Construction of an ABC tricycle exhibiting trans-intrabridgehead stereochemistry. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00243-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nakamura T, Matsui T, Tanino K, Kuwajima I. A New Approach for Ingenol Synthesis. J Org Chem 1997; 62:3032-3033. [PMID: 11671678 DOI: 10.1021/jo970172n] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tsuyoshi Nakamura
- Department of Chemistry, Tokyo Institute of Technology, Meguro, Tokyo 152, Japan
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Rigby JH, de Sainte Claire V, Cuisiat SV, Heeg MJ. Synthetic Studies on the Ingenane Diterpenes. Direct Conversion of the out,out-Bicyclo[4.4.1]undecane System into a Highly Strained In,out Stereoisomer. J Org Chem 1996; 61:7992-7993. [PMID: 11667774 DOI: 10.1021/jo961714o] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- James H. Rigby
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202-3489
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Affiliation(s)
- Roger W. Alder
- School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
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Blankenfeldt W, Liao JW, Lo LC, Yeh MCP. Sequential additions of nucleophiles to tricarbonyl(η4-cycloheptadienyl)iron tetrafluoroborate. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)01656-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kobayashi M, Masumoto K, Nakai EI, Nakai T. Stereochemical control in the silyl triflate-mediated Claisen rearrangement of allylic esters. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)00485-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Rigby JH. Recent Advances in the synthesis of Tumor-Promoting Diterpenes. STEREOSELECTIVE SYNTHESIS 1993. [DOI: 10.1016/b978-0-444-89366-6.70013-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Stereoselective cyclopropanation of homoallylic alcohols. Formal attachment of a cyclopropane to a preexisting ring. Tetrahedron Lett 1991. [DOI: 10.1016/s0040-4039(00)93542-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Winkler JD, Muller CL, Hey JP, Ogilvie RJ, Haddad N, Squattrito PJ, Williard PG. The effect of chromophore transposition on the stereochemical outcome of the intramolecular dioxenone photocycloaddition reaction. Tetrahedron Lett 1989. [DOI: 10.1016/s0040-4039(01)93744-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wender PA, Brighty K. Studies on tumor promoters: V. Complementary 1,4-stereocontrol in phorboid cycloheptene synthesis via the divinylcyclopropane rearrangement. Tetrahedron Lett 1988. [DOI: 10.1016/s0040-4039(00)82443-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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