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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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Roncero AM, Tobal IE, Moro RF, Diez D, Marcos IS. Halimanes and cancer: ent-halimic acid as a starting material for the synthesis of antitumor drugs. Front Chem 2023; 11:1225355. [PMID: 37674527 PMCID: PMC10477373 DOI: 10.3389/fchem.2023.1225355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 07/12/2023] [Indexed: 09/08/2023] Open
Abstract
The development of new anti-cancer agents is an urgent necessity nowadays, as it is one of the major causes of mortality worldwide. Many drugs currently used are derived from natural products. Halimanes are a class of bicyclic diterpenoids present in various plants and microorganisms. Many of them exhibit biological activities such as antitumor, antimicrobial, or anti-inflammatory. Among them, ent-halimic acid is an easily accessible compound, in large quantities, from the ethyl acetate extract of the plant Halimium viscosum, and it has been used as a starting material in a number of bioactive molecules. In this work, we review all the natural halimanes with antitumor and related activities until date as well as the synthesis of antitumor compounds using ent-halimic acid as a starting material.
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Affiliation(s)
| | | | | | | | - Isidro S. Marcos
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca, Salamanca, Spain
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3
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Pombal S, M. Roncero A, E. Tobal I, García N, Silva L, Diez D, Mondolis E, Mero A, Morán-Pinzón J, Guerrero EI, Rodilla JM. Antioxidant Activity of New Carvone Derivatives. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20908081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Carvone is one of the most versatile synthons in organic synthesis. It has been used as starting material for a huge number of organic syntheses of natural products with interesting biological activities. This manuscript communicates the antioxidant activity against superoxide of carvone and several derivatives.
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Affiliation(s)
- Sofia Pombal
- Departamento de Química, Materiais Fibrosos e Tecnologias Ambientais-FibEnTech, Universidade da Beira Interior, Rua Marquês d’Ávila e Bolama, Covilha, Portugal
| | - Alejandro M. Roncero
- Department of Organic Chemistry, Avda Los Caidos s/n, University of Salamanca, Spain
| | - Ignacio E. Tobal
- Department of Organic Chemistry, Avda Los Caidos s/n, University of Salamanca, Spain
| | - Nieves García
- Department of Organic Chemistry, Avda Los Caidos s/n, University of Salamanca, Spain
| | - Lúcia Silva
- Departamento de Química, Materiais Fibrosos e Tecnologias Ambientais-FibEnTech, Universidade da Beira Interior, Rua Marquês d’Ávila e Bolama, Covilha, Portugal
| | - David Diez
- Department of Organic Chemistry, Avda Los Caidos s/n, University of Salamanca, Spain
| | - Eily Mondolis
- Department of Pharmacology, Avda Gustavo García de Paredes, Panama University, Panama
| | - Aldahir Mero
- Department of Pharmacology, Avda Gustavo García de Paredes, Panama University, Panama
| | - Juan Morán-Pinzón
- Department of Pharmacology, Avda Gustavo García de Paredes, Panama University, Panama
| | - Estela I. Guerrero
- Department of Pharmacology, Avda Gustavo García de Paredes, Panama University, Panama
| | - Jesús M. Rodilla
- Departamento de Química, Materiais Fibrosos e Tecnologias Ambientais-FibEnTech, Universidade da Beira Interior, Rua Marquês d’Ávila e Bolama, Covilha, Portugal
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4
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Tobal IE, Roncero AM, Moro RF, Díez D, Marcos IS. The Methylene-Cycloalkylacetate (MCA) Scaffold in Terpenyl Compounds with Potential Pharmacological Activities. Molecules 2019; 24:molecules24112120. [PMID: 31195609 PMCID: PMC6600407 DOI: 10.3390/molecules24112120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/03/2019] [Accepted: 06/03/2019] [Indexed: 01/30/2023] Open
Abstract
Recently, the methylene-cycloakylacetate (MCA) scaffold has been reported as a potential pharmacophore for neurite outgrowth activity. In this work, natural diterpenes that embed MCA fragments are reviewed, as they are major components of Halimium viscosum: ent-halimic acid, the prototype for these bioactive compounds. Herein, structures, sources, and activities for the natural diterpenes, as well as their synthetic derivatives of interest, are reviewed.
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Affiliation(s)
- Ignacio E Tobal
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca. Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
| | - Alejandro M Roncero
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca. Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
| | - Rosalina F Moro
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca. Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
| | - David Díez
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca. Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
| | - Isidro 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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5
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Lankri D, Haham D, Lahiani A, Lazarovici P, Tsvelikhovsky D. Methylene-Cycloalkylacetate (MCA) Scaffold-Based Compounds as Novel Neurotropic Agents. ACS Chem Neurosci 2018; 9:691-698. [PMID: 29265805 DOI: 10.1021/acschemneuro.7b00473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
One of the main symptoms in degenerative diseases is death of neuronal cell followed by the loss of neuronal pathways. In neuronal cultures, neurite outgrowths are cell sprouts capable of transforming into either axons or dendrites, to further form functional neuronal synaptic connections. Such connections have an important role in brain cognition, neuronal plasticity, neuronal survival, and regeneration. Therefore, drugs that stimulate neurite outgrowth may be found beneficial in ameliorating neural degeneration. Here, we establish the existence of a unique family of methylene-cycloalkylacetate-based molecules (MCAs) that interface with neuronal cell properties and operate as acceptable pharmacophores for a novel neurotropic (neurite outgrowth inducing) lead compounds. Using an established PC12 cell bioassay, we investigated the neurotropic effect of methylene-cycloalkylacetate compounds by comparison to NGF, a known neurotropic factor. Micrographs of the cells were collected by using a light microscope camera, and digitized photographs were analyzed for compound-induced neurotropic activity using an NIH image protocol. The results indicate that the alkene element, integrated within the cycloalkylacetate core, is indispensable for neurotropic activity. The discovered lead compounds need further mechanistic investigation and may be improved toward development of a neurotropic drug.
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Affiliation(s)
- David Lankri
- School of Pharmacy, Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Dikla Haham
- School of Pharmacy, Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Adi Lahiani
- School of Pharmacy, Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Philip Lazarovici
- School of Pharmacy, Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Dmitry Tsvelikhovsky
- School of Pharmacy, Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
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6
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Roncero AM, Tobal IE, Moro RF, Díez D, Marcos IS. Halimane diterpenoids: sources, structures, nomenclature and biological activities. Nat Prod Rep 2018; 35:955-991. [DOI: 10.1039/c8np00016f] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Diterpenes with a halimane skeleton constitute a small group of natural products that can be biogenetically considered as being between labdane and clerodane diterpenoids.
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Affiliation(s)
- Alejandro M. Roncero
- Departamento de Química Orgánica
- Facultad de Ciencias Químicas
- Universidad de Salamanca
- 37008 Salamanca
- Spain
| | - Ignacio E. Tobal
- Departamento de Química Orgánica
- Facultad de Ciencias Químicas
- Universidad de Salamanca
- 37008 Salamanca
- Spain
| | - Rosalina F. Moro
- Departamento de Química Orgánica
- Facultad de Ciencias Químicas
- Universidad de Salamanca
- 37008 Salamanca
- Spain
| | - David Díez
- Departamento de Química Orgánica
- Facultad de Ciencias Químicas
- Universidad de Salamanca
- 37008 Salamanca
- Spain
| | - Isidro S. Marcos
- Departamento de Química Orgánica
- Facultad de Ciencias Químicas
- Universidad de Salamanca
- 37008 Salamanca
- Spain
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7
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Pombal S, Hernández Y, Diez D, Mondolis E, Mero A, Morán-Pinzón J, Guerrero EI, Rodilla JM. Antioxidant Activity of Carvone and Derivatives against Superoxide Ion. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200502] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Carvone has corroborated its versatility as starting material for building blocks synthesis in organic chemistry, being achieved a new chiral lactone. It has been done a study on the antioxidant activity against superoxide of carvone and a chloro derivative that show the potent activity of the natural product ( R)-carvone, 1.
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Affiliation(s)
- Sofia Pombal
- Materiais Fibrosos e Tecnologias Ambientais-FibEnTech, Departamento de Química, Universidade da Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001- Covilhã, Portugal
| | - Yaiza Hernández
- Department of Organic Chemistry, Avda Los Caidos s/n, University of Salamanca, Salamanca, Spain, 37008
| | - David Diez
- Department of Organic Chemistry, Avda Los Caidos s/n, University of Salamanca, Salamanca, Spain, 37008
| | - Eily Mondolis
- Department of Pharmacology, Avda Gustavo García de Paredes, Panama University, Panama, Panama
| | - Aldahir Mero
- Department of Pharmacology, Avda Gustavo García de Paredes, Panama University, Panama, Panama
| | - Juan Morán-Pinzón
- Department of Pharmacology, Avda Gustavo García de Paredes, Panama University, Panama, Panama
| | - Estela I. Guerrero
- Department of Pharmacology, Avda Gustavo García de Paredes, Panama University, Panama, Panama
| | - Jesús M. Rodilla
- Materiais Fibrosos e Tecnologias Ambientais-FibEnTech, Departamento de Química, Universidade da Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001- Covilhã, Portugal
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8
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Synthesis of Bioconjugate Sesterterpenoids with Phospholipids and Polyunsaturated Fatty Acids. Molecules 2015; 21:E47. [PMID: 26729084 PMCID: PMC6273371 DOI: 10.3390/molecules21010047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 12/21/2015] [Accepted: 12/22/2015] [Indexed: 01/03/2023] Open
Abstract
A series of sesterterpenoid bioconjugates with phospholipids and polyunsaturated fatty acids (PUFAs) have been synthesized for biological activity testing as antiproliferative agents in several cancer cell lines. Different substitution analogues of the original lipidic ether edelfosine (1-O-octadecyl-2-O-methyl-rac-glycero-3-phosphocholine) are obtained varying the sesterterpenoid in position 1 or 2 of the glycerol or a phosphocholine or PUFA unit in position 3. Simple bioconjugates of sesterterpenoids and eicosapentaenoic acid (EPA) have been obtained too. All synthetic derivatives were tested against the human tumour cell lines HeLa (cervix) and MCF-7 (breast). Some compounds showed good IC50 (0.3 and 0.2 μM) values against these cell lines.
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9
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Urosa A, Marcos IS, Díez D, Padrón JM, Basabe P. Synthesis of Luffarin L and 16-epi-Luffarin L Using a Temporary Silicon-Tethered Ring-Closing Metathesis Reaction. J Org Chem 2015; 80:6447-55. [DOI: 10.1021/acs.joc.5b00876] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aitor Urosa
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca, Plaza de los Caídos, 1-5, 37008, Salamanca, Spain
| | - Isidro S. Marcos
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca, Plaza de los Caídos, 1-5, 37008, Salamanca, Spain
| | - David Díez
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca, Plaza de los Caídos, 1-5, 37008, Salamanca, Spain
| | - José M. Padrón
- BioLab,
Instituto Universitario de Bio-Orgánica “Antonio González”
(IUBO-AG), Centro de Investigaciones Biomédicas de Canarias
(CIBICAN), Universidad de La Laguna, C/Astrofísico Francisco Sánchez
2, 38206, La Laguna, Spain
| | - Pilar Basabe
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca, Plaza de los Caídos, 1-5, 37008, Salamanca, Spain
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10
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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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11
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Synthesis and biological activity of polyalthenol and pentacyclindole analogues. Eur J Med Chem 2014; 73:265-79. [DOI: 10.1016/j.ejmech.2013.12.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 12/10/2013] [Accepted: 12/12/2013] [Indexed: 11/19/2022]
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12
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Abstract
The natural product sesquiterpenyl indoles are structural hybrids from farnesyl pyrophosphate and tryptophan or its precursors, often with unusual and complex structural features, many of them with interesting biological activities. In this review the compounds of this class known until now are classified, a biosynthetic approach of each group is proposed and a review of the synthesis or synthetic approaches is communicated.
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Affiliation(s)
- Isidro S Marcos
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca, Plaza de los Caidos 1-5, 37008 Salamanca, Spain.
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13
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Marcos IS, Moro RF, Costales I, Basabe P, Díez D, Mollinedo F, Urones JG. Biomimetic synthesis of an antitumour indole sesquiterpene alkaloid, 12-epi-ent-pentacyclindole. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.06.075] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Marcos IS, Moro RF, Costales I, Basabe P, Díez D, Mollinedo F, Urones JG. Synthesis of 12-epi-ent-polyalthenol an antitumour indole sesquiterpene alkaloid. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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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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16
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17
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18
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19
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Yamaguchi-Type Lactonization as a Key Step in the Synthesis of Marine Metabolites: (+)-Luffalactone. J Org Chem 2009; 74:7750-4. [DOI: 10.1021/jo9013996] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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20
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Synthesis of an ent-halimanolide from ent-halimic acid. Molecules 2008; 13:1120-34. [PMID: 18560332 PMCID: PMC6245183 DOI: 10.3390/molecules13051120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2008] [Revised: 05/07/2008] [Accepted: 05/07/2008] [Indexed: 11/22/2022] Open
Abstract
An efficient synthesis of ent-halimanolide 2 (15,16-epoxy-12-oxo-ent-halima-5(10),13(16),14-trien-18,2β-olide), from ent-halimic acid has been achieved, corroborating the structure of the natural compound and establishing its absolute configuration.
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21
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Trost BM, Ashfeld BL. Coupling of alkenes and alkynes: synthesis of the C1-C11 And C18-C28 fragments of miyakolide. Org Lett 2008; 10:1893-6. [PMID: 18426220 DOI: 10.1021/ol800347u] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A transition metal-mediated, atom-economical approach toward the crucial A and D rings of miyakolide is described. A Pd-catalyzed alkyne-alkyne coupling/6- endo- dig cyclization is employed to assemble the A ring fragment. The key D ring pyran is constructed utilizing an Ru-catalyzed alkene-alkyne coupling followed by a Pd-catalyzed allylic alkylation to establish the all-cis stereochemistry.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA.
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22
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23
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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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24
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Basabe P, Bodero O, Marcos IS, Diez D, de Román M, Blanco A, Urones JG. Synthesis of (+)-lagerstronolide from (+)-sclareol. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.09.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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26
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Basabe P, Delgado S, Marcos IS, Diez D, Diego A, de Román M, Sanz F, Urones J. Nor-limonoid and homoisoanticopalane lactones from methyl isoanticopalate. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.06.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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28
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29
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Patil SN, Liu F. Base-Assisted Regio- and Diastereoselective Conversion of Functionalized Furans to Butenolides Using Singlet Oxygen. Org Lett 2006; 9:195-8. [PMID: 17217263 DOI: 10.1021/ol062551l] [Citation(s) in RCA: 28] [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
A facile synthesis of beta-functionalized gamma-hydroxybutenolides was achieved using a Baylis-Hillman reaction followed by singlet oxygen oxidation. The conversion from 3-furfural was regio- and diastereoselective. [reaction: see text].
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Affiliation(s)
- Santoshkumar N Patil
- Department of Chemistry & Biomolecular Sciences, Macquarie University, Sydney, NSW 2109, Australia
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30
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Synthetic studies towards the ent-labdane diterpenoids: rearrangement of ent-halimanes. Molecules 2006; 11:792-807. [PMID: 17971756 DOI: 10.3390/11100792] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2006] [Revised: 10/18/2006] [Accepted: 10/23/2006] [Indexed: 11/16/2022] Open
Abstract
For the first time ent-labdanes have been synthetised starting from ent-halimic acid, following a route that is the reverse of the biosynthetic one leading to the former compounds.
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31
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32
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Basabe P, Delgado S, Marcos IS, Diez D, Diego A, De Román M, Urones JG. Synthesis of Three Marine Natural Sesterterpenolides from Methyl Isoanticopalate. First Enantioselective Synthesis of Luffolide. J Org Chem 2005; 70:9480-5. [PMID: 16268623 DOI: 10.1021/jo0515529] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[Reaction: see text]. The synthesis of three marine sponge metabolites, luffolide (4), 5, and 6, are described for the first time, establishing the absolute configuration of these compounds. The key intermediate, aldehyde 17, was obtained from methyl isoanticopalate, 11. The addition of 3-furyllithium to 17 and subsequent photochemical oxidation give the gamma-hydroxybutenolide 5 and its epimer at C-16. Sesterterpenolide 6 is obtained by dehydration of 5. From the key aldehyde 17, luffolide (4) was obtained in six steps.
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Affiliation(s)
- P Basabe
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
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33
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Abstract
This review covers the literature published in 2003 for marine natural products, with 619 citations (413 for the period January to December 2003) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, coelenterates, bryozoans, molluscs, tunicates and echinoderms. The emphasis is on new compounds (656 for 2003), together with their relevant biological activities, source organisms and country or origin. Biosynthetic studies or syntheses that lead to the revision of structures or stereochemistries have been included (78), including any first total syntheses of a marine natural product.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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34
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Rodilla JM, Silva ML, Dı́ez D, Urones JG, Sanz F. ent-Hydrohalimic acid transformations: synthesis of a diterpenic bislactone. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2004.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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