1
|
Berthonneau C, Nun P, Rivière M, Pauvert M, Dénès F, Lebreton J. Hemisynthesis of 2,3,4-13C3-1,4-Androstadien-3,17-dione: A Key Precursor for the Synthesis of 13C3-Androstanes and 13C3-Estranes. J Org Chem 2018; 83:3727-3737. [DOI: 10.1021/acs.joc.7b03216] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Clément Berthonneau
- Université de Nantes, Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM), UMR CNRS 6230, 2, rue de la Houssinière BP 92208, Nantes Cedex 3 44322, France
- Atlanchim Pharma, 3, Rue Aronnax, Saint Herblain 44800, France
| | - Pierrick Nun
- Université de Nantes, Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM), UMR CNRS 6230, 2, rue de la Houssinière BP 92208, Nantes Cedex 3 44322, France
| | - Matthieu Rivière
- Université de Nantes, Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM), UMR CNRS 6230, 2, rue de la Houssinière BP 92208, Nantes Cedex 3 44322, France
| | - Mickael Pauvert
- Atlanchim Pharma, 3, Rue Aronnax, Saint Herblain 44800, France
| | - Fabrice Dénès
- Université de Nantes, Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM), UMR CNRS 6230, 2, rue de la Houssinière BP 92208, Nantes Cedex 3 44322, France
| | - Jacques Lebreton
- Université de Nantes, Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM), UMR CNRS 6230, 2, rue de la Houssinière BP 92208, Nantes Cedex 3 44322, France
- Atlanchim Pharma, 3, Rue Aronnax, Saint Herblain 44800, France
| |
Collapse
|
2
|
Clarke J, Bonney KJ, Yaqoob M, Solanki S, Rzepa HS, White AJP, Millan DS, Braddock DC. Epimeric Face-Selective Oxidations and Diastereodivergent Transannular Oxonium Ion Formation Fragmentations: Computational Modeling and Total Syntheses of 12-Epoxyobtusallene IV, 12-Epoxyobtusallene II, Obtusallene X, Marilzabicycloallene C, and Marilzabicycloallene D. J Org Chem 2016; 81:9539-9552. [PMID: 27704814 DOI: 10.1021/acs.joc.6b02008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total syntheses of 12-epoxyobtusallene IV, 12-epoxyobtusallene II, obtusallene X, marilzabicycloallene C, and marilzabicycloallene D as halogenated C15-acetogenin 12-membered bicyclic and tricyclic ether bromoallene-containing marine metabolites from Laurencia species are described. Two enantiomerically pure C4-epimeric dioxabicyclo[8.2.1]tridecenes were synthesized by E-selective ring-closing metathesis where their absolute stereochemistry was previously set via catalytic asymmetric homoallylic epoxidation and elaborated via regioselective epoxide-ring opening and diastereoselective bromoetherification. Epimeric face-selective oxidation of their Δ12,13 olefins followed by bromoallene installation allowed access to the oppositely configured 12,13-epoxides of 12-epoxyobtusallene II and 12-epoxyobtusallene IV. Subsequent exploration of their putative biomimetic oxonium ion formation-fragmentations reactions revealed diastereodivergent pathways giving marilzabicycloallene C and obtusallene X, respectively. The original configurations of the substrates evidently control oxonium ion formation and their subsequent preferred mode of fragmentation by nucleophilic attack at C9 or C12. Quantum modeling of this stereoselectivity at the ωB97X-D/Def2-TZVPPD/SCRF = methanol level revealed that in addition to direction resulting from hydrogen bonding, the dipole moment of the ion-pair transition state is an important factor. Marilzabicycloallene D as a pentahalogenated 12-membered bicyclic ether bromoallene was synthesized by a face-selective chloronium ion initiated oxonium ion formation-fragmentation process followed by subsequent bromoallene installation.
Collapse
Affiliation(s)
- James Clarke
- Department of Chemistry, Imperial College London , South Kensington, London, SW7 2AZ, U.K
| | - Karl J Bonney
- Department of Chemistry, Imperial College London , South Kensington, London, SW7 2AZ, U.K
| | - Muhammad Yaqoob
- Department of Chemistry, Imperial College London , South Kensington, London, SW7 2AZ, U.K
| | - Savade Solanki
- Department of Chemistry, Imperial College London , South Kensington, London, SW7 2AZ, U.K
| | - Henry S Rzepa
- Department of Chemistry, Imperial College London , South Kensington, London, SW7 2AZ, U.K
| | - Andrew J P White
- Department of Chemistry, Imperial College London , South Kensington, London, SW7 2AZ, U.K
| | - David S Millan
- Sandwich Laboratories, Pfizer Global Research and Development, Ramsgate Road, Sandwich, Kent CT13 9NJ, U.K
| | - D Christopher Braddock
- Department of Chemistry, Imperial College London , South Kensington, London, SW7 2AZ, U.K
| |
Collapse
|
3
|
Christopher Braddock D, Mahtey A, Rzepa HS, White AJP. Stable bromoallene oxides. Chem Commun (Camb) 2016; 52:11219-11222. [PMID: 27722258 DOI: 10.1039/c6cc06395k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first stable bromoallene oxides were obtained by the DMDO epoxidation of 1-bromo-1,3-di-tert-alkylallenes, producing the first crystalline allene oxide of any kind. The epoxidations are regioselective for the bromine-bearing Δ1,2 alkene, and also face selective producing single diastereomer E-olefin products.
Collapse
Affiliation(s)
| | - Areeb Mahtey
- Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
| | - Henry S Rzepa
- Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
| | - Andrew J P White
- Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
| |
Collapse
|
4
|
Gutiérrez-Cepeda A, Fernández JJ, Norte M, López-Rodríguez M, Brito I, Muller CD, Souto ML. Additional Insights into the Obtusallene Family: Components of Laurencia marilzae. JOURNAL OF NATURAL PRODUCTS 2016; 79:1184-1188. [PMID: 26967625 DOI: 10.1021/acs.jnatprod.5b01080] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The obtusallenes are a significant subset of C15-halogenated acetogenins that incorporate 12-membered cyclic ethers. We have recently reported the isolation from Laurencia marilzae of 12-epoxyobtusallene IV (1) and its related α,β-unsaturated carboxylate ester (2), both of special biogenetic relevance. Here we describe the final step of our study, the isolation of three new analogues (3-5), among these, the first bromopropargylic derivative (3) of this class of macrocyclic C15-acetogenins. The structures were elucidated by analysis of NMR and X-ray data. 12-Epoxyobtusallene IV (1), its new isomer 4, and known obtusallene IV (6) were evaluated for their apoptosis-inducing activities in a human hepatocarcinoma cell line.
Collapse
Affiliation(s)
- Adrián Gutiérrez-Cepeda
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
- Departamento de Química, Instituto de Química, Facultad de Ciencias, Universidad Autónoma de Santo Domingo , Ciudad Universitaria, 1355 Santo Domingo, Dominican Republic
| | - José J Fernández
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
| | - Manuel Norte
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
| | - Matías López-Rodríguez
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
| | - Iván Brito
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
- Departamento de Química, Universidad de Antofagasta , Avenida Angamos 601, Antofagasta, Chile
| | - Christian D Muller
- Laboratoire d'Innovation Thérapeutique, UMR 7200 CRNS, Faculté de Pharmacie, Université de Strasbourg , 67401 Illkirch, France
| | - María L Souto
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
| |
Collapse
|
5
|
The synthesis and biological activity of novel anthracenone-pyranones and anthracenone-furans. Bioorg Med Chem 2015; 23:3552-65. [DOI: 10.1016/j.bmc.2015.04.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Revised: 04/02/2015] [Accepted: 04/09/2015] [Indexed: 11/24/2022]
|
6
|
Harvey MJ, Mason NJ, Rzepa HS. Digital data repositories in chemistry and their integration with journals and electronic notebooks. J Chem Inf Model 2014; 54:2627-35. [PMID: 25171653 DOI: 10.1021/ci500302p] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We discuss the concept of recasting the data-rich scientific journal article into two components, a narrative and separate data components, each of which is assigned a persistent digital object identifier. Doing so allows each of these components to exist in an environment optimized for purpose. We make use of a poorly-known feature of the handle system for assigning persistent identifiers that allows an individual data file from a larger file set to be retrieved according to its file name or its MIME type. The data objects allow facile visualization and retrieval for reuse of the data and facilitates other operations such as data mining. Examples from five recently published articles illustrate these concepts.
Collapse
Affiliation(s)
- Matthew J Harvey
- High Performance Computing Unit, ICT Division, Imperial College London , South Kensington Campus, London SW7 2AZ, United Kingdom
| | | | | |
Collapse
|