1
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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.
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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
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2
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Kolb B, Silva dos Santos D, Krause S, Zens A, Laschat S. Sequential hydrozirconation/Pd-catalyzed cross coupling of acyl chlorides towards conjugated (2 E,4 E)-dienones. Beilstein J Org Chem 2023; 19:176-185. [PMID: 36814450 PMCID: PMC9940601 DOI: 10.3762/bjoc.19.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 02/07/2023] [Indexed: 02/19/2023] Open
Abstract
Dienones are challenging building blocks in natural product synthesis due to their high reactivity and complex synthesis. Based on previous work and own initial results, a new stereospecific sequential hydrozirconation/Pd-catalyzed acylation of enynes with acyl chlorides towards conjugated (2E,4E)-dienones is reported. We investigated a number of substrates with different alkyl and aryl substituents in the one-pot reaction and showed that regardless of the substitution pattern, the reactions lead to the stereoselective formation (≥95% (2E,4E)) of the respective dienones under mild conditions. It was found that enynes with alkyl chains gave higher yields than the corresponding aryl-substituted analogues, whereas the variation of the acyl chlorides did not affect the reaction significantly. The synthetic application is demonstrated by formation of non-natural and natural dienone-containing terpenes such as β-ionone which was available in 4 steps and 6% overall yield.
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Affiliation(s)
- Benedikt Kolb
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Daniela Silva dos Santos
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Sanja Krause
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Anna Zens
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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3
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Abstract
Herein, we report an enantioselective and convergent total synthesis of (+)-pepluanol A, a structurally intriguing Euphorbia diterpenoid natural product featuring a 5/6/7/3-fused tetracyclic skeleton, from known building blocks in 11 steps. The successful strategy relies on a phenyl selenide-mediated Morita-Baylis-Hillman type reaction as a connective step, forging the precursor for the key intramolecular Diels-Alder reaction to construct the congested 5/6/7-tricyclic framework. A diastereoconvergent cascade starting with an acid-induced removal of the C1-MOM protecting group followed by a retro-aldol/aldol reaction resulted in the formation of a single diastereomer. This stereoconvergency allowed for the successful substrate-controlled diastereoselective cyclopropanation of an advanced intermediate to establish the full carboskeleton of (+)-pepluanol A (1).
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Affiliation(s)
- Po Yuan
- Institute of Organic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
| | - Tanja Gaich
- Institute of Organic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
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4
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Euphzycopias A-I, macrocyclic diterpenes with NLRP3 inflammasome inhibitory activity from Euphorbia helioscopia L. Fitoterapia 2022; 157:105139. [PMID: 35108573 DOI: 10.1016/j.fitote.2022.105139] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/19/2022] [Accepted: 01/24/2022] [Indexed: 11/23/2022]
Abstract
A phytochemical investigation was conducted on Euphorbia helioscopia, resulting in the isolation of thirteen compounds, including nine undescribed diterpenoids, Euphzycopias A - I (1-9), of which the skeletons of compounds 1-4 were found in E. helioscopia L. Compounds 1-3 had 5/7/6 cyclic systems, while compound 4 had a 4/11 polycyclic system with a 4,7-cyclic ether between C-4 and C-7. The anti-inflammasome test using the isolated compounds (1-6, 8-13) showed that the diterpenes from E. helioscopia L. had a strong inhibitory effect on NLRP3 inflammasomes with IC50 values of 3.34-14.92 μM.
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5
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Yuan P, Gerlinger CKG, Herberger J, Gaich T. Ten-Step Asymmetric Total Synthesis of (+)-Pepluanol A. J Am Chem Soc 2021; 143:11934-11938. [PMID: 34324326 DOI: 10.1021/jacs.1c05257] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first asymmetric synthesis of pepluanol A (1) is presented. The synthesis route is very concise (10 steps) and features a Curtin-Hammett-driven stereoconvergent intramolecular Diels-Alder reaction. A Nozaki-Hiyama-Kishi reaction comprises the connective step, bringing together the seven-membered enone system bearing the dienophile and the diene in the side chain. Subsequent stereoconvergent IMDA reaction furnishes the carboskeleton of the natural product in only 7 steps. The reactions were carried out on a gram scale up to an advanced intermediate and including the stereoconvergent intramolecular Diels-Alder reaction.
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Affiliation(s)
- Po Yuan
- Institute of Organic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
| | - Christa K G Gerlinger
- Institute of Organic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
| | - Jan Herberger
- Institute of Inorganic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
| | - Tanja Gaich
- Institute of Organic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
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6
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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.
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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
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7
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Lou SJ, Li XH, Zhou XL, Fang DM, Gao F. Palladium-Catalyzed Synthesis and Anticancer Activity of Paclitaxel-Dehydroepiandrosterone Hybrids. ACS OMEGA 2020; 5:5589-5600. [PMID: 32201853 PMCID: PMC7081646 DOI: 10.1021/acsomega.0c00558] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 02/26/2020] [Indexed: 05/28/2023]
Abstract
According to the activity-structure relationship of the C-13 side chain in paclitaxel or docetaxel, eighteen novel paclitaxel-dehydroepiandrosterone (DHEA) hybrids were designed and synthesized by Pd(II)-catalyzed Suzuki-Miyaura cross-coupling of 17-trifluoromethanesulfonic enolate-DHEA with different aryl boronic acids. The in vitro anticancer activity of the hybrids against a human liver cancer cell line (HepG-2) was evaluated by MTT assay, showing that most of these hybrids possessed moderate antiproliferative activity against the HepG-2 cancer cell line. Among these hybrids, three ones (7b, 7g, and 7i) with ortho-substituents in the phenyl group of the D-ring of DHEA analogues exhibited moderate anticancer activity. The optimal compound 7i showed superior anticancer activity against the HepG-2 cell line with an IC50 value of 26.39 μM.
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Affiliation(s)
- Sheng-Jie Lou
- School
of Life Science and Engineering, Southwest
Jiaotong University, No. 111, Erhuan Road, Chengdu 610031, PR China
| | - Xiao-Huan Li
- School
of Life Science and Engineering, Southwest
Jiaotong University, No. 111, Erhuan Road, Chengdu 610031, PR China
| | - Xian-Li Zhou
- School
of Life Science and Engineering, Southwest
Jiaotong University, No. 111, Erhuan Road, Chengdu 610031, PR China
| | - Dong-Mei Fang
- Chengdu
Institute of Biology, Chinese Academy of
Sciences, No. 9, Section
4, South Renmin Road, Chengdu 610041, PR China
| | - Feng Gao
- School
of Life Science and Engineering, Southwest
Jiaotong University, No. 111, Erhuan Road, Chengdu 610031, PR China
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8
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Monteiro S, Imramovský A, Pauk K, Růžičková Z, Carvalho C, Pavlík J. Synthesis of Alfaprostol Key Intermediate Ynol via Br/Mg Exchange. ORG PREP PROCED INT 2020. [DOI: 10.1080/00304948.2020.1716623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Sara Monteiro
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Aleš Imramovský
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Karel Pauk
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Catarina Carvalho
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Jan Pavlík
- Cayman Pharma Ltd, Neratovice, Czech Republic
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9
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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]
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10
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Zhang J, Liu M, Wu C, Zhao G, Chen P, Zhou L, Xie X, Fang R, Li H, She X. Total Synthesis of (−)‐Pepluanol B: Conformational Control of the Eight‐Membered‐Ring System. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915876] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jing Zhang
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Meng Liu
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Chuanhua Wu
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Gaoyuan Zhao
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Peiqi Chen
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Lin Zhou
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Ran Fang
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Huilin Li
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
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11
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Zhang J, Liu M, Wu C, Zhao G, Chen P, Zhou L, Xie X, Fang R, Li H, She X. Total Synthesis of (−)‐Pepluanol B: Conformational Control of the Eight‐Membered‐Ring System. Angew Chem Int Ed Engl 2020; 59:3966-3970. [DOI: 10.1002/anie.201915876] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Indexed: 02/03/2023]
Affiliation(s)
- Jing Zhang
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Meng Liu
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Chuanhua Wu
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Gaoyuan Zhao
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Peiqi Chen
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Lin Zhou
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Ran Fang
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Huilin Li
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 Gansu P. R. China
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12
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Fattahian M, Ghanadian M, Ali Z, Khan IA. Jatrophane and rearranged jatrophane-type diterpenes: biogenesis, structure, isolation, biological activity and SARs (1984-2019). PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2020; 19:265-336. [PMID: 32292314 PMCID: PMC7152985 DOI: 10.1007/s11101-020-09667-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 02/29/2020] [Indexed: 05/12/2023]
Abstract
Diterpene compounds specially macrocyclic ones comprising jatrophane, lathyrane, terracinolide, ingenane, pepluane, paraliane, and segetane skeletons occurring in plants of the Euphorbiaceae family are of considerable interest in the context of natural product drug discovery programs. They possess diverse complex skeletons and a broad spectrum of therapeutically relevant biological activities including anti-inflammatory, anti-chikungunya virus, anti-HIV, cytotoxic, and multidrug resistance-reversing activities as well as curative effects on thrombotic diseases. Among macrocyclic diterpenes of Euphorbia, the discovery of jatrophane and modified jatrophane diterpenes with a wide range of structurally unique polyoxygenated polycyclic derivatives and as a new class of powerful inhibitors of P-glycoprotein has opened new frontiers for research studies on this genus. In this review, an attempt has been made to give in-depth coverage of the articles on the naturally occurring jatrophanes and rearranged jatrophane-type diterpenes isolated from species belonging to the Euphorbiaceae family published from 1984 to March 2019, with emphasis on the biogenesis, isolation methods, structure, biological activity, and structure-activity relationship.
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Affiliation(s)
- Maryam Fattahian
- School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mustafa Ghanadian
- School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677 USA
| | - Zulfiqar Ali
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677 USA
| | - Ikhlas A. Khan
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677 USA
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13
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Schäfer A, Köhler SC, Lohe M, Wiese M, Hiersemann M. Synthesis of Homoverrucosanoid-Derived Esters and Evaluation as MDR Modulators. J Org Chem 2017; 82:10504-10522. [PMID: 28949536 DOI: 10.1021/acs.joc.7b02012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The synthesis of the A-B-cis,B-C-trans-annulated cyclohepta[e]hydrindane core of a gagunin E analogue is reported in detail. The tricarbocyclic scaffold was assembled starting from an easily accessible A ring building block by a (4 + 2)-cycloaddition for annulation of the B ring. A ring-closing metathesis served for construction of the seven-membered C ring. The angular methyl groups were attached by electrophilic cyclopropanation-ring opening. A library based on the most active lead compound was made accessible by esterification of the terpenols with commercially available acids. A transannular etherification reaction gave access to tetracyclic derivatives of the synthetic inhibitors. The members of the compound library of non-natural homoverrucosanoid-derived esters were examined as modulators of the membrane transporter proteins ABCB1 (P-gp), ABCG2 (BCRP), and ABCC1 (MRP1), which are involved in the formation of multidrug resistance (MDR) in cancer chemotherapy.
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Affiliation(s)
- Andreas Schäfer
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund , 44227 Dortmund, Germany
| | - Sebastian C Köhler
- Pharmazeutisches Institut, Pharmazeutische Chemie II, Universität Bonn , 53121 Bonn, Germany
| | - Markus Lohe
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund , 44227 Dortmund, Germany
| | - Michael Wiese
- Pharmazeutisches Institut, Pharmazeutische Chemie II, Universität Bonn , 53121 Bonn, Germany
| | - Martin Hiersemann
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund , 44227 Dortmund, Germany
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14
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Xuan J, Liu Z, Zhu A, Rao P, Yu L, Ding H. Diastereoselective Total Synthesis of the Euphorbia
Diterpenoid Pepluanol A: A Reductive Annulation Approach. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704929] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jun Xuan
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Zhaobo Liu
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - An Zhu
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Peirong Rao
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Lei Yu
- School of Chemistry and Chemical Engineering; Yangzhou University; Yangzhou 225002 China
| | - Hanfeng Ding
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
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15
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Xuan J, Liu Z, Zhu A, Rao P, Yu L, Ding H. Diastereoselective Total Synthesis of the Euphorbia
Diterpenoid Pepluanol A: A Reductive Annulation Approach. Angew Chem Int Ed Engl 2017; 56:8898-8901. [DOI: 10.1002/anie.201704929] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/01/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Jun Xuan
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Zhaobo Liu
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - An Zhu
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Peirong Rao
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Lei Yu
- School of Chemistry and Chemical Engineering; Yangzhou University; Yangzhou 225002 China
| | - Hanfeng Ding
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
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16
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Fei DQ, Dong LL, Qi FM, Fan GX, Li HH, Li ZY, Zhang ZX. Euphorikanin A, a Diterpenoid Lactone with a Fused 5/6/7/3 Ring System from Euphorbia kansui. Org Lett 2016; 18:2844-7. [DOI: 10.1021/acs.orglett.6b01093] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong-Qing Fei
- School of Pharmacy and ‡State Key Laboratory
of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Le-Le Dong
- School of Pharmacy and ‡State Key Laboratory
of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Feng-Ming Qi
- School of Pharmacy and ‡State Key Laboratory
of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Gai-Xia Fan
- School of Pharmacy and ‡State Key Laboratory
of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Hui-Hong Li
- School of Pharmacy and ‡State Key Laboratory
of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Zheng-Yu Li
- School of Pharmacy and ‡State Key Laboratory
of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Zhan-Xin Zhang
- School of Pharmacy and ‡State Key Laboratory
of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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17
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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.
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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
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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.
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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
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19
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21
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Singh V, Das B, Jarhad DB, Mobin SM. Molecular diversity from aromatics. Cycloaddition of cyclohexa-2,4-dienones, ring-closing metathesis and sigmatropic shifts: a general and stereoselective route to novel spirocarbocyclics. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Behera TK, Singh V. Molecular complexity from aromatics. Studies on synthesis of polycyclic system related to crotogoudin. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.08.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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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.
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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
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25
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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
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26
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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.
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Affiliation(s)
- Francesca Pintus
- Department of Sciences of Life and Environment, University of Cagliari, 09042, Monserrato, CA, Italy
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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]
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28
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Becker J, Butt L, von Kiedrowski V, Mischler E, Quentin F, Hiersemann M. Total Synthesis of (−)-Ecklonialactone B. Org Lett 2013; 15:5982-5. [DOI: 10.1021/ol4028418] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julia Becker
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Lena Butt
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Valeska von Kiedrowski
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Elisabeth Mischler
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Florian Quentin
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Martin Hiersemann
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
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29
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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.
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Affiliation(s)
- Rita Fürst
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
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30
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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.
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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
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31
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Gabriele E, Singh FV, Freudendahl DM, Wirth T. Selenenylations of alkenes with styrene nucleophiles. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.08.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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32
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33
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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.
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Affiliation(s)
- Delia Spanò
- Department of Sciences of Life and Environment, University of Cagliari, Cittadella Universitaria, Monserrato, Italy
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34
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Mohan P, Koushik K, Fuertes MJ. Efforts toward the total synthesis of a jatrophane diterpene. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.03.080] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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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.
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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
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36
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Jana R, Pathak TP, Sigman MS. Advances in transition metal (Pd, Ni, Fe)-catalyzed cross-coupling reactions using alkyl-organometallics as reaction partners. Chem Rev 2011; 111:1417-92. [PMID: 21319862 PMCID: PMC3075866 DOI: 10.1021/cr100327p] [Citation(s) in RCA: 1661] [Impact Index Per Article: 127.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ranjan Jana
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-8500
| | - Tejas P. Pathak
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-8500
| | - Matthew S. Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-8500
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Duschek A, Kirsch SF. 2-Iodoxybenzoic Acid-A Simple Oxidant with a Dazzling Array of Potential Applications. Angew Chem Int Ed Engl 2011; 50:1524-52. [DOI: 10.1002/anie.201000873] [Citation(s) in RCA: 205] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Indexed: 12/26/2022]
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38
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Duschek A, Kirsch SF. 2-Iodoxybenzoesäure - ein einfaches Oxidationsmittel mit einer Vielfalt an Anwendungsmöglichkeiten. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201000873] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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39
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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]
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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
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42
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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
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43
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Jung ME, Cordova J, Murakami M. Total Synthesis of (±)-Kellermanoldione: Stepwise Cycloaddition of a Functionalized Diene and Allenoate. Org Lett 2009; 11:3882-5. [DOI: 10.1021/ol901455q] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael E. Jung
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, California 90095
| | - Jesus Cordova
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, California 90095
| | - Masayuki Murakami
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, California 90095
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