1
|
Kowalska E, Dyguda M, Artelska A, Albrecht A. Visible Light Promoted [3+2]-Cycloaddition for the Synthesis of Cyclopenta[ b]chromenocarbonitrile Derivatives. J Org Chem 2023; 88:16589-16597. [PMID: 38037694 PMCID: PMC10696553 DOI: 10.1021/acs.joc.3c02172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 11/05/2023] [Accepted: 11/09/2023] [Indexed: 12/02/2023]
Abstract
In the manuscript, a novel method for the preparation of cyclopenta[b]chromenocarbonitrile derivatives via [3+2] cycloaddition reaction of substituted 3-cyanochromones and N-cyclopropyloamines initiated by visible light catalysis has been described. The reaction was performed in the presence of Eosin Y as a photocatalyst. The key parameters responsible for the success of the described strategy are visible light, a small amount of photoredox catalyst, an anhydrous solvent, and an inert atmosphere.
Collapse
Affiliation(s)
- Ewelina Kowalska
- Institute
of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Żeromskiego 116, Łódź 90-924, Poland
| | - Mateusz Dyguda
- Institute
of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Żeromskiego 116, Łódź 90-924, Poland
| | - Angelika Artelska
- Institute
of Applied Radiation Chemistry, Lodz University
of Technology, Żeromskiego 116, Łódź 90-924, Poland
| | - Anna Albrecht
- Institute
of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, Żeromskiego 116, Łódź 90-924, Poland
| |
Collapse
|
2
|
Influence of counteranion and humidity on the thermal, mechanical and conductive properties of covalently crosslinked ionenes. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
3
|
Ni FQ, Wu SQ, Li W, Li Q, Yin S. Stereoselective Construction of the Methylcyclopentane Core of Peditithins B-H with Five Continuous Stereocenters. Org Lett 2020; 22:9360-9364. [PMID: 33215930 DOI: 10.1021/acs.orglett.0c03615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A stereoselective construction of the methylcyclopentane core (3) of jatrophane diterpenoids peditithins B-H was achieved in 14 steps from commercially available d-(+)-ribono-1,4-lactone (9). The linear 5-ene-heptanal derived from 9 was cyclized to the five-membered ring by an intramolecular carbonyl ene reaction, and five continuous stereocenters on 3 were stereoselectively introduced via a successive substrate-controlled manner, involving diastereoselective 1,4-addition, MoOPH-induced hydroxylation, and stereospecific epoxidation.
Collapse
Affiliation(s)
- Fu-Qiang Ni
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Shu-Qi Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Wei Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Qingjiang Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Sheng Yin
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| |
Collapse
|
4
|
DeLomba WC, Stone EA, Alley KA, Iannarone V, Tarsis E, Ovaska S, Ovaska TV. Utilization of the Thorpe-Ingold Effect in the Synthesis of Cyclooctanoid Ring Systems via Anionic 6- exo- dig Cyclization/Claisen Rearrangement Sequence. J Org Chem 2020; 85:9464-9474. [PMID: 32687712 DOI: 10.1021/acs.joc.0c01132] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate a facile approach for the synthesis of gem-disubstituted cyclooctanoids, a motif found in several biologically active compounds. Appropriately substituted 1-alkenyl-5-pentyn-1-ols bearing gem-dialkyl substituents at either the C2, C3, or C4 position serve as useful precursors to a number of cyclooct-4-enone derivatives via a tandem, microwave-assisted oxyanionic 6-exo-dig cyclization/Claisen rearrangement reaction. gem-Dialkyl activation is necessary for these reactions to occur, as unactivated 1-alkenyl-5-pentyn-1-ols fail to undergo 6-exo-dig cyclization under the conditions employed. Further application of the methodology to the corresponding gem-dialkoxy system was also explored to facilitate access to more complex carbocycles.
Collapse
Affiliation(s)
- Weston C DeLomba
- Department of Chemistry, Connecticut College, 270 Mohegan Avenue, New London, Connecticut 06320, United States
| | - Elizabeth A Stone
- Department of Chemistry, Connecticut College, 270 Mohegan Avenue, New London, Connecticut 06320, United States
| | - Kimberly A Alley
- Department of Chemistry, Connecticut College, 270 Mohegan Avenue, New London, Connecticut 06320, United States
| | - Victoria Iannarone
- Department of Chemistry, Connecticut College, 270 Mohegan Avenue, New London, Connecticut 06320, United States
| | - Emily Tarsis
- Department of Chemistry, Connecticut College, 270 Mohegan Avenue, New London, Connecticut 06320, United States
| | - Sami Ovaska
- Department of Chemistry, Connecticut College, 270 Mohegan Avenue, New London, Connecticut 06320, United States
| | - Timo V Ovaska
- Department of Chemistry, Connecticut College, 270 Mohegan Avenue, New London, Connecticut 06320, United States
| |
Collapse
|
5
|
Shepherd ED, Hallside MS, Sutro JL, Thompson A, Hutchings M, Burton JW. Synthesis of the cyclopentane core of pepluanin A. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.130981] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
6
|
Elshamy AI, Mohamed TA, Al-Rowaily SL, Abd-ElGawad AM, Dar BA, Shahat AA, Hegazy MEF. Euphosantianane E-G: Three New Premyrsinane Type Diterpenoids from Euphorbia sanctae-catharinae with Contribution to Chemotaxonomy. Molecules 2019; 24:molecules24132412. [PMID: 31261927 PMCID: PMC6651875 DOI: 10.3390/molecules24132412] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 06/26/2019] [Accepted: 06/26/2019] [Indexed: 11/16/2022] Open
Abstract
Euphorbia species were widely used in traditional medicines for the treatment of several diseases. From the aerial parts of Egyptian endemic plant, Euphorbia sanctae-catharinae, three new premyrsinane diterpenoids, namely, euphosantianane E-G (1-3), alongside four known triterpenes, 9,19-cyclolanostane-3β,24S-diol (4), 25-methoxycycloartane-3β,24S-diol (5), 25-methylenecycloartan-3β,24R-diol (6), and 25-methylenecycloartan-3β,24S-diol (7), were isolated and identified. The chemical structures were proven depending upon spectroscopic analysis, including FTIR, HRFABMS, and 1D/2D-NMR. The chemotaxonomic significance of the isolated compounds, especially diterpenes from E. sanctae-catharinae compared to those documented from different Euphorbia species was also studied via agglomerative hierarchical clustering (AHC). The Egyptian endemic Euphorbia sanctae-catharina was grouped with E. bupleuroides, E. fidjiana, E. fischeriana, E. pithyusa subsp. cupanii, E. prolifera, and E. seguieriana, where myrsinol diterpenoids were the characteristic compounds.
Collapse
Affiliation(s)
- Abdelsamed I Elshamy
- Natural Compounds Chemistry Department, National Research Centre, 12622, 33 El Bohouth St., Dokki, Giza 12622, Egypt
| | - Tarik A Mohamed
- Chemistry of Medicinal Plants Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
| | - Saud L Al-Rowaily
- Plant Production Department, College of Food & Agriculture Sciences, King Saud University, P.O. Box 2460 Riyadh 11451, Saudi Arabia
| | - Ahmed M Abd-ElGawad
- Plant Production Department, College of Food & Agriculture Sciences, King Saud University, P.O. Box 2460 Riyadh 11451, Saudi Arabia
- Department of Botany, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Basharat A Dar
- Plant Production Department, College of Food & Agriculture Sciences, King Saud University, P.O. Box 2460 Riyadh 11451, Saudi Arabia
| | - Abdelaaty A Shahat
- Chemistry of Medicinal Plants Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Mohamed-Elamir F Hegazy
- Chemistry of Medicinal Plants Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt.
- Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, University of Mainz, Staudinger Weg 5, 55128 Mainz, Germany.
| |
Collapse
|
7
|
Fuwa H, Sasaki M. Exploiting Ruthenium Carbene-Catalyzed Reactions in Total Synthesis of Marine Oxacyclic Natural Products. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160224] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
8
|
Wan LS, Nian Y, Ye CJ, Shao LD, Peng XR, Geng CA, Zuo ZL, Li XN, Yang J, Zhou M, Qiu MH. Three Minor Diterpenoids with Three Carbon Skeletons from Euphorbia peplus. Org Lett 2016; 18:2166-9. [PMID: 27075046 DOI: 10.1021/acs.orglett.6b00787] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Euphorbia peplus has been used in traditional medicine to treat asthma and psoriasis. Three highly modified diterpenoids, namely, pepluacetal (1) and pepluanol A-B (2-3), have been isolated and identified from this plant. Compounds 1-3 exhibit unprecedented 5/4/7/3, 5/6/7/3, and 5/5/8/3 ring systems, respectively. Their structures with absolute configurations were determined by spectroscopic analyses, X-ray crystallography, and electronic circular dichroism calculations. Since Kv1.3 is a validated target for the treatment of autoimmune diseases, such as multiple sclerosis, type-1 diabetes, asthma, and psoriasis, Kv1.3 was studied in terms of its response to the new compounds. All three compounds inhibit Kv1.3, with compound 3 being the most effective with an IC50 value of 9.50 μM.
Collapse
Affiliation(s)
- Luo-Sheng Wan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , 132 Lanhei Road, Kunming 650201, P. R. China
| | - Yin Nian
- Key Laboratory of Animal Models and Human Diease Mechanisms, and Ion Channel Research and Drug Development Center, Kunming Institute of Zoology, Chinese Academy of Sciences , Kunming 650223, P. R. China
| | - Chen-Jun Ye
- Key Laboratory of Animal Models and Human Diease Mechanisms, and Ion Channel Research and Drug Development Center, Kunming Institute of Zoology, Chinese Academy of Sciences , Kunming 650223, P. R. China
| | - Li-Dong Shao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , 132 Lanhei Road, Kunming 650201, P. R. China
| | - Xing-Rong Peng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , 132 Lanhei Road, Kunming 650201, P. R. China
| | - Chang-An Geng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , 132 Lanhei Road, Kunming 650201, P. R. China
| | - Zhi-Li Zuo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , 132 Lanhei Road, Kunming 650201, P. R. China
| | - Xiao-Nian Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , 132 Lanhei Road, Kunming 650201, P. R. China
| | - Jian Yang
- Key Laboratory of Animal Models and Human Diease Mechanisms, and Ion Channel Research and Drug Development Center, Kunming Institute of Zoology, Chinese Academy of Sciences , Kunming 650223, P. R. China.,Department of Biological Sciences, Columbia University , New York, New York 10027, United States
| | - Ming Zhou
- Key Laboratory of Animal Models and Human Diease Mechanisms, and Ion Channel Research and Drug Development Center, Kunming Institute of Zoology, Chinese Academy of Sciences , Kunming 650223, P. R. China.,Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine , Houston, Texas 77030, United States
| | - Ming-Hua Qiu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , 132 Lanhei Road, Kunming 650201, P. R. China
| |
Collapse
|
9
|
Schäfer A, Golz C, Preut H, Strohmann C, Hiersemann M. Crystal structure of rac-(3aR,4S,5aR,6S,9R,10aS,10bR)-3a,5a,9-tri-methyl-tetra-deca-hydro-6,9-ep-oxy-cyclo-hepta-[e]inden-4-ol monohydrate. Acta Crystallogr E Crystallogr Commun 2015; 71:o690-1. [PMID: 26396907 PMCID: PMC4555390 DOI: 10.1107/s2056989015015698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 08/21/2015] [Indexed: 11/26/2022]
Abstract
The title hydrate, C17H28O2·H2O, was synthesized in order to determine the relative configuration of the tetra-cyclic framework. The fused 5,6,7-tricarbocyclic core exhibits an entire cis-annulation, featuring a 1,4-cis-relation of the angular methyl groups in the six-membered ring. The oxa bridge of the ep-oxy-cyclo-heptane moiety is oriented towards the concave face of the boat-shaped mol-ecule, whereas the angular methyl groups are directed towards the convex face. The asymmetric unit of the crystal contains two nearly identical formula units, which are related via a pseudo-centre of symmetry. The structure could be solved in the space groups I-4 and I41/a. The refinement in the acentric space group, however, gave significantly better results and these are used in this paper. O-H⋯O hydrogen bonds are observed between the organic mol-ecules, between the organic mol-ecules and the water mol-ecules, and between the water mol-ecules, forming a chain along the c-axis direction.
Collapse
Affiliation(s)
- Andreas Schäfer
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Christopher Golz
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Hans Preut
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Carsten Strohmann
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Martin Hiersemann
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| |
Collapse
|
10
|
|
11
|
Spanò D, Pintus F, Esposito F, Loche D, Floris G, Medda R. Euphorbia characias latex: micromorphology of rubber particles and rubber transferase activity. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2015; 87:26-34. [PMID: 25532121 DOI: 10.1016/j.plaphy.2014.12.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 12/08/2014] [Indexed: 05/27/2023]
Abstract
We have recently characterized a natural rubber in the latex of Euphorbia characias. Following that study, we here investigated the rubber particles and rubber transferase in that Mediterranean shrub. Rubber particles, observed by scanning electron microscopy, are spherical in shape with diameter ranging from 0.02 to 1.2 μm. Washed rubber particles exhibit rubber transferase activity with a rate of radiolabeled [(14)C]IPP incorporation of 4.5 pmol min(-1)mg(-1). Denaturing electrophoresis profile of washed rubber particles reveals a single protein band of 37 kDa that is recognized in western blot analysis by antibodies raised against the synthetic peptide whose sequence, DVVIRTSGETRLSNF, is included in one of the five regions conserved among cis-prenyl chain elongation enzymes. The cDNA nucleotide sequence of E. characias rubber transferase (GenBank JX564541) and the deduced amino acid sequence appear to be highly homologous to the sequence of several plant cis-prenyltransferases.
Collapse
Affiliation(s)
- Delia Spanò
- Department of Sciences of Life and Environment, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, CA, Italy
| | - Francesca Pintus
- Department of Sciences of Life and Environment, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, CA, Italy
| | - Francesca Esposito
- Department of Sciences of Life and Environment, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, CA, Italy
| | - Danilo Loche
- Department of Chemical and Geological Sciences, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, CA, Italy
| | - Giovanni Floris
- Department of Sciences of Life and Environment, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, CA, Italy
| | - Rosaria Medda
- Department of Sciences of Life and Environment, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, CA, Italy.
| |
Collapse
|
12
|
|
13
|
Tremel P, Iacobucci C, Massi L, Olivero S, Gal JF, Duñach E. Catalytic intramolecular carbonyl–ene reaction with ketones: evidence for a retro–ene process. NEW J CHEM 2015. [DOI: 10.1039/c5nj01286d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The ene and reverse ene-processes occur with ketones, as shown by control experiments and by ESI-MS analysis.
Collapse
Affiliation(s)
- P. Tremel
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - C. Iacobucci
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - L. Massi
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - S. Olivero
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - J.-F. Gal
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - E. Duñach
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| |
Collapse
|
14
|
Highly stereoselective synthesis of cyclopentanes bearing four stereocentres by a rhodium carbene-initiated domino sequence. Nat Commun 2014; 5:4455. [PMID: 25082301 PMCID: PMC4149473 DOI: 10.1038/ncomms5455] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 06/19/2014] [Indexed: 11/18/2022] Open
Abstract
Stereoselective synthesis of a cyclopentane nucleus by convergent annulations constitutes a significant challenge for synthetic chemists. Though a number of biologically relevant cyclopentane natural products are known, more often than not, the cyclopentane core is assembled in a stepwise fashion due to lack of efficient annulation strategies. Herein, we report the rhodium-catalyzed reactions of vinyldiazoacetates with (E)-1,3-disubstituted 2-butenols generate cyclopentanes, containing four new stereogenic centers with very high levels of stereoselectivity (99% ee, >97 : 3 dr). The reaction proceeds by a carbene–initiated domino sequence consisting of five distinct steps: rhodium–bound oxonium ylide formation, [2,3]-sigmatropic rearrangement, oxy-Cope rearrangement, enol–keto tautomerization, and finally an intramolecular carbonyl ene reaction. A systematic study is presented detailing how to control chirality transfer in each of the four stereo-defining steps of the cascade, consummating in the development of a highly stereoselective process.
Collapse
|
15
|
Tymann D, Klüppel A, Hiller W, Hiersemann M. Cyclopentanoids by Uncatalyzed Intramolecular Carbonyl Ene (ICE) Reaction of α-Keto Esters. Org Lett 2014; 16:4062-5. [DOI: 10.1021/ol501204m] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David Tymann
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - André Klüppel
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Wolf Hiller
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Martin Hiersemann
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| |
Collapse
|
16
|
Vasas A, Hohmann J. Euphorbia Diterpenes: Isolation, Structure, Biological Activity, and Synthesis (2008–2012). Chem Rev 2014; 114:8579-612. [DOI: 10.1021/cr400541j] [Citation(s) in RCA: 310] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Andrea Vasas
- Department of Pharmacognosy, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary
| | - Judit Hohmann
- Department of Pharmacognosy, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary
| |
Collapse
|
17
|
Pintus F, Spanò D, Floris G, Medda R. Euphorbia characias latex amine oxidase and peroxidase: interacting enzymes? Protein J 2014; 32:435-41. [PMID: 23839010 DOI: 10.1007/s10930-013-9501-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
This minireview deals the enzymatic transformation of some amino acids as arginine and ornithine, amines as tyramine, putrescine, spermine and spermidine, and other substances as nitric oxide and thiocyanate. These reactions, catalyzed by two proteins purified from the latex of Euphorbia characias, a copper/quinone containing amine oxidase and a cationic peroxidase, show enzymatic activity interactions probably occurring between these proteins in Euphorbia latex.
Collapse
Affiliation(s)
- Francesca Pintus
- Department of Sciences of Life and Environment, University of Cagliari, 09042, Monserrato, CA, Italy
| | | | | | | |
Collapse
|
18
|
Lentsch C, Fürst R, Mulzer J, Rinner U. Jatrophane Diterpenes: Preparation of the Western Fragment of Pl-3. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301616] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
19
|
Fürst R, Rinner U. Synthesis of an advanced intermediate of the jatrophane diterpene Pl-4: a dibromide coupling approach. J Org Chem 2013; 78:8748-58. [PMID: 23895274 PMCID: PMC3767202 DOI: 10.1021/jo401480t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The preparation of an advanced intermediate toward the synthesis of the jatrophane diterpene Pl-4 is described. The key step is a regioselective chelation-controlled lithiation of the (Z)-configured bromide in the corresponding vinyl dibromide precursor. The method outlined within this Article is suitable for the facile access of sterically hindered internal vinyl halides for further coupling reactions.
Collapse
Affiliation(s)
- Rita Fürst
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | | |
Collapse
|
20
|
Alvarez-Dorta D, León EI, Kennedy AR, Martín A, Pérez-Martín I, Riesco-Fagundo C, Suárez E. Sequential Norrish Type II Photoelimination and Intramolecular Aldol Cyclization of α-Diketones: Synthesis of Polyhydroxylated Cyclopentitols by Ring Contraction of Hexopyranose Carbohydrate Derivatives. Chemistry 2013; 19:10312-33. [DOI: 10.1002/chem.201301230] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Indexed: 02/03/2023]
|
21
|
Fuwa H, Kawakami M, Noto K, Muto T, Suga Y, Konoki K, Yotsu-Yamashita M, Sasaki M. Concise synthesis and biological assessment of (+)-neopeltolide and a 16-member stereoisomer library of 8,9-dehydroneopeltolide: identification of pharmacophoric elements. Chemistry 2013; 19:8100-10. [PMID: 23606326 DOI: 10.1002/chem.201300664] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Indexed: 02/01/2023]
Abstract
We describe herein a concise synthesis of (+)-neopeltolide, a marine macrolide natural product that elicits a highly potent antiproliferative activity against several human cancer cell lines. Our synthesis exploited the powerful bond-forming ability and high functional group compatibility of olefin metathesis and esterification reactions to minimize manipulations of oxygen functionalities and to maximize synthetic convergency. Our findings include a chemoselective olefin cross-metathesis reaction directed by H-bonding, and a ring-closing metathesis conducted under non-high dilution conditions. Moreover, we developed a 16-member stereoisomer library of 8,9-dehydroneopeltolide to systematically explore the stereostructure-activity relationships. Assessment of the antiproliferative activity of the stereoisomers against A549 human lung adenocarcinoma, MCF-7 human breast adenocarcinoma, HT-1080 human fibrosarcoma, and P388 murine leukemia cell lines has revealed marked differences in potency between the stereoisomers. This study provides comprehensive insights into the structure-activity relationship of this important antiproliferative agent, leading to the identification of the pharmacophoric structural elements and the development of truncated analogues with nanomolar potency.
Collapse
Affiliation(s)
- Haruhiko Fuwa
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Fürst R, Lentsch C, Rinner U. Towards the Total Synthesis of Pl-3: Preparation of the Eastern Fragment through a Diastereoselective SmI 2-Mediated Reformatsky Reaction. European J Org Chem 2013; 2013:2293-2297. [PMID: 23687456 PMCID: PMC3654569 DOI: 10.1002/ejoc.201300148] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Indexed: 11/17/2022]
Abstract
The jatrophane diterpene Pl-3, isolated in 2003 from Euphorbia platyphyllos, is a structurally complex natural product with highly promising biological properties that include pronounced antiproliferative activity and the inhibition of the efflux-pump activity of multidrug resistance p-glycoprotein. Herein, the synthesis of the eastern fragment of Pl-3 is outlined. The target compound is synthesized in nine synthetic operations in good overall yield, starting from readily available d-ribose. The key step in the preparation of the eastern part of Pl-3 is a diastereoselective SmI2-mediated Reformatsky reaction. The proposed route is highly flexible and could also be applied to the synthesis of structurally related jatrophane diterpenes.
Collapse
Affiliation(s)
- Rita Fürst
- Department of Organic Chemistry, University of Vienna Währinger Straße 38, 1090 Vienna, Austria , E-mail: Homepage: http://rinner-group.univie.ac.at
| | | | | |
Collapse
|
23
|
|
24
|
Spanò D, Pintus F, Mascia C, Scorciapino MA, Casu M, Floris G, Medda R. Extraction and characterization of a natural rubber from Euphorbia characias latex. Biopolymers 2012; 97:589-94. [PMID: 22605550 DOI: 10.1002/bip.22044] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A natural rubber was identified and characterized for the first time in the latex of the perennial Mediterranean shrub Euphorbia characias. Four different methods, i.e., acetone, acetic acid, trichloroacetic acid, and Triton® X-100, followed by successive treatments with cyclohexane/ethanol, were employed to extract the natural rubber. The rubber content was shown to be 14% (w/v) of the E. characias latex, a low content compared with that of Hevea brasiliensis (30-35%) but a similar content to other rubber producing plants. E. characias rubber showed a molecular weight of 93,000 with a M(w) /M(n) of 2.9. (1) H NMR, (13) C NMR, and FTIR analysis revealed the characteristic of the cis-1,4-polyisoprene typical of natural rubber. These results provided novel insight into latex components and will ultimately benefit the broader understanding of E. characias latex composition.
Collapse
Affiliation(s)
- Delia Spanò
- Department of Sciences of Life and Environment, University of Cagliari, Cittadella Universitaria, Monserrato, Italy
| | | | | | | | | | | | | |
Collapse
|
25
|
Tymann D, Nelson B, Strohmann C, Preut H, Hiersemann M. 1-Phenyl-5-{[2-(trimethyl-sil-yl)eth-yl]sulfon-yl}-1H-tetra-zole. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o2369. [PMID: 22058975 PMCID: PMC3200698 DOI: 10.1107/s1600536811030492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Accepted: 07/28/2011] [Indexed: 05/31/2023]
Abstract
The title compound, C(12)H(18)N(4)O(2)SSi, was synthesized to be employed in a Julia-Kocieński olefination. In the mol-ecule, the dihedral angle between the phenyl ring and the tetra-zole ring is 41.50 (5)°. The significantly longer Si-C(methyl-ene) bond [1.8786 (13) Å] and the shortened adjacent C-C bond [1.5172 (18) Å], as well as the significant deviation of the corresponding Si-C-C angle [114.16 (9)°] from the ideal tetra-hedral angle, can be attributed to the β-effect of silicon. In the crystal, mol-ecules are held together by van der Waals inter-actions.
Collapse
Affiliation(s)
- David Tymann
- Fakultät Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Björn Nelson
- Fakultät Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Carsten Strohmann
- Fakultät Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Hans Preut
- Fakultät Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Martin Hiersemann
- Fakultät Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| |
Collapse
|
26
|
Hoye TR, Jeon J, Tennakoon MA. Allylmalonate as an activator subunit for the initiation of relay ring-closing metathesis reactions. Angew Chem Int Ed Engl 2011; 50:2141-3. [PMID: 21344570 DOI: 10.1002/anie.201005044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Indexed: 11/09/2022]
Affiliation(s)
- Thomas R Hoye
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA.
| | | | | |
Collapse
|
27
|
Hoye TR, Jeon J, Tennakoon MA. Allylmalonate as an Activator Subunit for the Initiation of Relay Ring-Closing Metathesis Reactions. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201005044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
28
|
Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2009. Coord Chem Rev 2011. [DOI: 10.1016/j.ccr.2010.07.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
29
|
Schnabel C, Sterz K, Müller H, Rehbein J, Wiese M, Hiersemann M. Total Synthesis of Natural and Non-Natural Δ5,6Δ12,13-Jatrophane Diterpenes and Their Evaluation as MDR Modulators. J Org Chem 2010; 76:512-22. [DOI: 10.1021/jo1019738] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christoph Schnabel
- Technische Universität Dortmund, Fakultät Chemie, D-44227 Dortmund, Germany
| | - Katja Sterz
- Universität Bonn, Pharmazeutisches Institut, Pharmazeutische Chemie II, D-53121 Bonn, Germany
| | - Henrik Müller
- Universität Bonn, Pharmazeutisches Institut, Pharmazeutische Chemie II, D-53121 Bonn, Germany
| | - Julia Rehbein
- Technische Universität Dortmund, Fakultät Chemie, D-44227 Dortmund, Germany
| | - Michael Wiese
- Universität Bonn, Pharmazeutisches Institut, Pharmazeutische Chemie II, D-53121 Bonn, Germany
| | - Martin Hiersemann
- Technische Universität Dortmund, Fakultät Chemie, D-44227 Dortmund, Germany
| |
Collapse
|
30
|
Hutait S, Singh V, Batra S. Facile Synthesis of Dihydroquinoline-Fused Canthines by Intramolecular Aza-Diels-Alder Reaction. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000925] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
31
|
Dowling MS, Vanderwal CD. Ring-Closing Metathesis of Allylsilanes As a Flexible Strategy toward Cyclic Terpenes. Short Syntheses of Teucladiol, Isoteucladiol, Poitediol, and Dactylol and an Attempted Synthesis of Caryophyllene. J Org Chem 2010; 75:6908-22. [DOI: 10.1021/jo101439h] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthew S. Dowling
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697-2025
| | - Christopher D. Vanderwal
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697-2025
| |
Collapse
|
32
|
Lentsch C, Rinner U. General Synthesis of Highly Functionalized Cyclopentane Segments for the Preparation of Jatrophane Diterpenes. Org Lett 2009; 11:5326-8. [DOI: 10.1021/ol902221y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christoph Lentsch
- Institute of Organic Chemistry, University of Vienna, Währingerstrasse 38, A-1090 Vienna, Austria
| | - Uwe Rinner
- Institute of Organic Chemistry, University of Vienna, Währingerstrasse 38, A-1090 Vienna, Austria
| |
Collapse
|
33
|
Schnabel C, Hiersemann M. Total Synthesis of Jatrophane Diterpenes from Euphorbia characias. Org Lett 2009; 11:2555-8. [DOI: 10.1021/ol900819u] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christoph Schnabel
- Fakultät Chemie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Martin Hiersemann
- Fakultät Chemie, Technische Universität Dortmund, 44227 Dortmund, Germany
| |
Collapse
|