1
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Kim S, Oiler J, Xing Y, O'Doherty GA. De novo asymmetric Achmatowicz approach to oligosaccharide natural products. Chem Commun (Camb) 2022; 58:12913-12926. [PMID: 36321854 PMCID: PMC9710213 DOI: 10.1039/d2cc05280f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
The development and application of the asymmetric synthesis of oligosaccharides from achiral starting materials is reviewed. This de novo asymmetric approach centers around the use of asymmetric catalysis for the synthesis of optically pure furan alcohols in conjunction with Achmatowicz oxidative rearrangement for the synthesis of various pyranones. In addition, the use of a diastereoselective palladium-catalyzed glycosylation and subsequent diastereoselective post-glycosylation transformation was used for the synthesis of oligosaccharides. The application of this approach to oligosaccharide synthesis is discussed.
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Affiliation(s)
- Sugyeom Kim
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, 02115, USA.
| | - Jeremy Oiler
- Department of Chemistry, William Paterson University, Wayne, NJ, 07470, USA
| | - Yalan Xing
- Department of Chemistry, Hofstra University, Hempstead, NY, 11549, USA.
| | - George A O'Doherty
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, 02115, USA.
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2
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Truong S, Mootoo DR. C-Glycosylcrotylboronates for the Synthesis of Glycomimetics. Org Lett 2021; 24:191-195. [PMID: 34958591 DOI: 10.1021/acs.orglett.1c03845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The stereoselective synthesis of E- and Z- isomers of a C- mannosyl crotylpinacolboronate via Ni-promoted reactions on an allylic acetate and a diene precursor, respectively, is described. The E- and Z- isomers reacted with 1,2-O-isopropylidene glyceraldehyde in the presence or absence of (R)- and (S)- TRIP catalysts, to give predominantly 3,4-anti and 3,4-syn crotylation products, respectively, with moderate to high facial selectivity. These products were transformed to biologically relevant C-manno-disaccharides.
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Affiliation(s)
- Steven Truong
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States.,The Graduate Center, CUNY, 365 Fifth Avenue, New York, New York 10016, United States
| | - David R Mootoo
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States.,The Graduate Center, CUNY, 365 Fifth Avenue, New York, New York 10016, United States
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3
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Xing Q, Hao Z, Hou J, Li G, Gao Z, Gou J, Li C, Yu B. Manganese-Catalyzed Achmatowicz Rearrangement Using Green Oxidant H 2O 2. J Org Chem 2021; 86:9563-9586. [PMID: 34181426 DOI: 10.1021/acs.joc.1c00858] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Oxidation reactions have been extensively studied in the context of the transformations of biomass-derived furans. However, in contrast to the vast literature on utilizing the stoichiometric oxidants, such as m-CPBA and NBS, catalytic methods for the oxidative furan-recyclizations remain scarcely investigated. Given this, we report a means of manganese-catalyzed oxidations of furan with low loading, achieving the Achmatowicz rearrangement in the presence of hydrogen peroxide as an environmentally benign oxidant under mild conditions with wide functional group compatibility.
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Affiliation(s)
- Qingzhao Xing
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Zhe Hao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Jing Hou
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Gaoqiang Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Normal University, Xi'an 710062, China
| | - Chaoqun Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.,SCNU Qingyuan Institute of Science and Technology Innovation Co., Ltd., Qingyuan 511517, China
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4
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Enantioselective Synthesis of a New Non-Natural Gabosine. Molecules 2021; 26:molecules26051423. [PMID: 33800731 PMCID: PMC7961443 DOI: 10.3390/molecules26051423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/23/2021] [Accepted: 03/03/2021] [Indexed: 11/17/2022] Open
Abstract
The preparation of a new non-natural gabosine is reported, in which the chirality is transferred from the toluene’s biotransformed metabolite (1R,2S)-3-methylcyclohexa-3.5-diene-1,2-diol. Further chemical transformations to introduce additional functionality and chirality to the molecule were also accomplished.
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5
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Babczyk A, Wingen LM, Menche D. Optimized and Scalable Synthesis of Carba‐α‐
d
‐Glucosamine. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alexander Babczyk
- Kekulé‐Institut für Organische Chemie und Biochemie Rheinische Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Str. 1 53121 Bonn Germany
| | - Lukas M. Wingen
- Kekulé‐Institut für Organische Chemie und Biochemie Rheinische Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Str. 1 53121 Bonn Germany
| | - Dirk Menche
- Kekulé‐Institut für Organische Chemie und Biochemie Rheinische Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Str. 1 53121 Bonn Germany
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6
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Franconetti A, López Ó, Fernandez-Bolanos JG. Carbohydrates: Potential Sweet Tools Against Cancer. Curr Med Chem 2020; 27:1206-1242. [DOI: 10.2174/0929867325666180719114150] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 04/25/2018] [Accepted: 06/28/2018] [Indexed: 12/13/2022]
Abstract
:Cancer, one of the most devastating degenerative diseases nowadays, is one of the main targets in Medicinal Chemistry and Pharmaceutical industry. Due to the significant increase in the incidence of cancer within world population, together with the complexity of such disease, featured with a multifactorial nature, access to new drugs targeting different biological targets connected to cancer is highly necessary.:Among the vast arsenal of compounds exhibiting antitumor activities, this review will cover the use of carbohydrate derivatives as privileged scaffolds. Their hydrophilic nature, together with their capacity of establishing selective interactions with biological receptors located on cell surface, involved in cell-to-cell communication processes, has allowed the development of an ample number of new templates useful in cancer treatment.:Their intrinsic water solubility has allowed their use as of pro-drug carriers for accessing more efficiently the pharmaceutical targets. The preparation of glycoconjugates in which the carbohydrate is tethered to a pharmacophore has also allowed a better permeation of the drug through cellular membranes, in which selective interactions with the carbohydrate motifs are involved. In this context, the design of multivalent structures (e.g. gold nanoparticles) has been demonstrated to enhance crucial interactions with biological receptors like lectins, glycoproteins that can be involved in cancer progression.:Moreover, the modification of the carbohydrate structural motif, by incorporation of metal complexes, or by replacing their endocyclic oxygen, or carbon atoms with heteroatoms has led to new antitumor agents.:Such diversity of sugar-based templates with relevant antitumor activity will be covered in this review.
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Affiliation(s)
- Antonio Franconetti
- Departamento de Quimica Organica, Facultad de Quimica, Universidad de Sevilla, Sevilla, Spain
| | - Óscar López
- Departamento de Quimica Organica, Facultad de Quimica, Universidad de Sevilla, Sevilla, Spain
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7
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Kim S, Li Y, Lin L, Sayasith PR, Tarr AT, Wright EB, Yasmin S, Lannigan DA, O'Doherty GA. Synthesis and Biological Evaluation of 4'-Substituted Kaempfer-3-ols. J Org Chem 2020; 85:4279-4288. [PMID: 32056430 DOI: 10.1021/acs.joc.9b03461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of two series of five kaempfer-3-ols was described. The first set all have a C-3 hydroxyl group and the second has a carboxymethoxy ether at the C-3 position. Both series have variable substitution at the C-4' position (i.e., OH, Cl, F, H, OMe). Both kaempferols and carboxymethoxy ethers were evaluated for their ability to inhibit ribosomal s6 kinase (RSK) activity and cancer cell proliferation.
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Affiliation(s)
- Sugyeom Kim
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Yu Li
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Lin Lin
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Peyton R Sayasith
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Ariel T Tarr
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | | | | | | | - George A O'Doherty
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
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8
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Li Y, Seber P, Wright EB, Yasmin S, Lannigan DA, O'Doherty GA. The affinity of RSK for cylitol analogues of SL0101 is critically dependent on the B-ring C-4'-hydroxy. Chem Commun (Camb) 2020; 56:3058-3060. [PMID: 32048692 DOI: 10.1039/d0cc00128g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Five cyclitol analogues of SL0101 with variable substitution at the C-4' position (i.e., OH, Cl, F, H, OMe) were synthesized. The series of analogues were evaluated for their ability to inhibit p90 ribosomal S6 kinase (RSK) activity. The study demonstrated the importance of the B-ring C-4' hydroxy group for RSK1/2 inhibition.
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Affiliation(s)
- Yu Li
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA.
| | - Pedro Seber
- Departments of Pathology, Microbiology & Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.
| | | | - Sharia Yasmin
- Cell & Developmental Biology, Nashville, TN 37232, USA
| | - Deborah A Lannigan
- Departments of Pathology, Microbiology & Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA. and Biomedical Engineering, Nashville, TN 37232, USA and Cell & Developmental Biology, Nashville, TN 37232, USA
| | - George A O'Doherty
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA.
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9
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Li Y, Sandusky ZM, Vemula R, Zhang Q, Wu B, Fukuda S, Li M, Lannigan DA, O'Doherty GA. Regioselective Synthesis of a C-4'' Carbamate, C-6'' n-Pr Substituted Cyclitol Analogue of SL0101. Org Lett 2020; 22:1448-1452. [PMID: 32009414 DOI: 10.1021/acs.orglett.0c00042] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An asymmetric synthesis of two analogues of SL0101 (1) has been achieved. The effort is aimed at the discovery of inhibitors of the p90 ribosomal S6 kinase (RSK) with improved bioavailability. The route relies upon the use of the Taylor catalyst to regioselectively install C-3″ acetyl or carbamate functionality. This study led to the identification of a third-generation analogue of SL0101 with a C-4″ n-Pr-carbamate and a C-3″ acetate with improved RSK inhibitory activity.
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Affiliation(s)
- Yu Li
- Department of Chemistry and Chemical Biology , Northeastern University , Boston , Massachusetts 02115 , United States
| | - Zachary M Sandusky
- Department of Pathology, Microbiology & Immunology , Vanderbilt University Medical Center , Nashville , Tennessee 37232 , United States
| | - Rajender Vemula
- Department of Chemistry and Chemical Biology , Northeastern University , Boston , Massachusetts 02115 , United States
| | - Qi Zhang
- Department of Chemistry and Chemical Biology , Northeastern University , Boston , Massachusetts 02115 , United States
| | - Bulan Wu
- Division of Natural Sciences, College of Natural & Applied Sciences , University of Guam , Mangilao , Guam 96923
| | - Shinji Fukuda
- Department of Pathology, Microbiology & Immunology , Vanderbilt University Medical Center , Nashville , Tennessee 37232 , United States.,Division of Cell Growth and Tumor Regulation, Proteo-Science Center , Ehime University , Toon , Ehime 791-0295 , Japan.,Department of Biochemistry and Molecular Genetics , Ehime University Graduate School of Medicine , Toon , Ehime 791-0295 , Japan
| | - Mingzong Li
- Department of Chemistry and Chemical Biology , Northeastern University , Boston , Massachusetts 02115 , United States
| | - Deborah A Lannigan
- Department of Pathology, Microbiology & Immunology , Vanderbilt University Medical Center , Nashville , Tennessee 37232 , United States.,Department of Biomedical Engineering , Vanderbilt University , Nashville , Tennessee 37232 , United States.,Department of Cell and Developmental Biology , Vanderbilt University , Nashville , Tennessee 37232 , United States
| | - George A O'Doherty
- Department of Chemistry and Chemical Biology , Northeastern University , Boston , Massachusetts 02115 , United States
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10
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Asymmetric total synthesis of (+)-gabosine C and (+)-4-epi-gabosine J using acetate migration and RCM reaction. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.04.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Silica gel enables Achmatowicz rearrangement with KBr/oxone under “anhydrous” condition for one-pot functionalization. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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12
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Dai Y, Tian B, Chen H, Zhang Q. Palladium-Catalyzed Stereospecific C-Glycosylation of Glycals with Vinylogous Acceptors. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00336] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yuanwei Dai
- Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, United States
| | - Baotong Tian
- Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, United States
| | - Huan Chen
- Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, United States
| | - Qiang Zhang
- Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, United States
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13
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Kiya N, Hidaka Y, Usui K, Hirai G. Synthesis of CH2-Linked α(1,6)-Disaccharide Analogues by α-Selective Radical Coupling C-Glycosylation. Org Lett 2019; 21:1588-1592. [DOI: 10.1021/acs.orglett.9b00133] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Noriaki Kiya
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yu Hidaka
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kazuteru Usui
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Go Hirai
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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14
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Narayana C, Kumari P, Ide D, Hoshino N, Kato A, Sagar R. Design and synthesis of N–acetylglucosamine derived 5a-carbasugar analogues as glycosidase inhibitors. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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15
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Hedberg C, Estrup M, Eikeland EZ, Jensen HH. Vinyl Grignard-Mediated Stereoselective Carbocyclization of Lactone Acetals. J Org Chem 2018; 83:2154-2165. [DOI: 10.1021/acs.joc.7b03079] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | | | - Espen Z. Eikeland
- Nano
Production and Micro Analysis, Danish Technological Institute, DK-2630 Taastrup, Denmark
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16
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Le Goff G, Adelin E, Arcile G, Ouazzani J. Total synthesis of the antibiotic 4-hydroxycyclopent-2-en-1-one acrylate derivative EA-2801. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.04.086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Hamama WS, Hassanien AEDE, Zoorob HH. Advanced Routes in Synthesis and Reactions of Lawsone Molecules (2-Hydroxynaphthalene-1,4-dione). J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2855] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wafaa S. Hamama
- Chemistry Department, Faculty of Science; Mansoura University; El-Gomhoria Street ET-35516 Mansoura Egypt
| | - Alaa El-Din E. Hassanien
- Chemistry Department, Faculty of Science; Mansoura University; El-Gomhoria Street ET-35516 Mansoura Egypt
| | - Hanafi H. Zoorob
- Chemistry Department, Faculty of Science; Mansoura University; El-Gomhoria Street ET-35516 Mansoura Egypt
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18
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Li M, Li Y, Ludwik KA, Sandusky ZM, Lannigan DA, O'Doherty GA. Stereoselective Synthesis and Evaluation of C6″-Substituted 5a-Carbasugar Analogues of SL0101 as Inhibitors of RSK1/2. Org Lett 2017; 19:2410-2413. [PMID: 28441024 DOI: 10.1021/acs.orglett.7b00945] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convergent synthesis of 5a-carbasugar analogues of the n-Pr-variant of SL0101 is described. The analogues were synthesized in an effort to find compounds with potent in vivo efficacy in the inhibition of p90 ribosomal s6 kinase (RSK1/2). The synthesis derived the desired C-4 L-rhamnose stereochemistry from quinic acid and used a highly selective cuprate addition, NaBH4 reduction, Mitsunobu inversion, and alkene dihydroxylation to install the remaining stereochemistry. A Pd-catalyzed cyclitolization stereoselectively installed the aglycon at the anomeric position. The analogues were evaluated as RSK1/2 inhibitors and found to have 3- to 6-fold improved activity.
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Affiliation(s)
- Mingzong Li
- Cancer Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37232, United States
| | - Yu Li
- Cancer Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37232, United States
| | - Katarzyna A Ludwik
- Departments of Pathology, Microbiology & Immunology , Nashville, Tennessee 37232, United States
| | - Zachary M Sandusky
- Cancer Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37232, United States
| | - Deborah A Lannigan
- Departments of Pathology, Microbiology & Immunology , Nashville, Tennessee 37232, United States.,Cancer Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37232, United States
| | - George A O'Doherty
- Department of Chemistry and Chemical Biology, Northeastern University , Boston, Massachusetts 02115, United States
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19
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Song W, Wang S, Tang W. De Novo Synthesis of Mono- and Oligosaccharides via Dihydropyran Intermediates. Chem Asian J 2017; 12:1027-1042. [DOI: 10.1002/asia.201700212] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Wangze Song
- School of Pharmacy; University of Wisconsin-Madison; Madison WI 53705 USA
- School of Pharmaceutical Science and Technology; State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian, 116024 P.R. China
| | - Shuojin Wang
- School of Pharmacy; Hainan Medical University; Haikou 571199 P.R. China
| | - Weiping Tang
- School of Pharmacy; University of Wisconsin-Madison; Madison WI 53705 USA
- Department of Chemistry; University of Wisconsin-Madison; Madison WI 53706 USA
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20
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Casalvieri KA, Matheson CJ, Backos DS, Reigan P. Selective Targeting of RSK Isoforms in Cancer. Trends Cancer 2017; 3:302-312. [PMID: 28718440 DOI: 10.1016/j.trecan.2017.03.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/08/2017] [Accepted: 03/08/2017] [Indexed: 12/21/2022]
Abstract
The p90 ribosomal S6 kinase family (RSK1-4) is a group of highly conserved Ser/Thr kinases that act as downstream effectors of the Ras/Raf/MEK/ERK signaling pathway. The RSKs phosphorylate a range of substrates involved in transcription, translation, cell cycle regulation, and cell survival. Although the RSKs have a high degree of sequence homology, their functional differences in cancer are of great interest. Current RSK inhibitors target more than one RSK isoform, and this may limit their efficacy as anticancer agents. Here, we review the structure and function of the RSK kinases, their role in cancer growth and survival, and their potential as modulators of chemoresistance. In addition, we summarize the development of current RSK inhibitors and their limitations.
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Affiliation(s)
- Kimberly A Casalvieri
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, V20-2102, Aurora, CO 80045, USA
| | - Christopher J Matheson
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, V20-2102, Aurora, CO 80045, USA
| | - Donald S Backos
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, V20-2102, Aurora, CO 80045, USA
| | - Philip Reigan
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, V20-2102, Aurora, CO 80045, USA.
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21
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Li X, Zhu J. Glycosylation via Transition-Metal Catalysis: Challenges and Opportunities. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600484] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaohua Li
- Department of Natural Sciences; University of Michigan-Dearborn; 4901 Evergreen Road 48128 Dearborn Michigan USA
| | - Jianglong Zhu
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering; The University of Toledo; 2801 West Bancroft Street 43606 Toledo Ohio USA
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22
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Toward the synthesis of hirsutellone B via an intramolecular Diels–Alder/ketene-trapping strategy. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.01.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Li M, Li Y, Mrozowski RM, Sandusky ZM, Shan M, Song X, Wu B, Zhang Q, Lannigan DA, O’Doherty GA. Synthesis and Structure-Activity Relationship Study of 5a-Carbasugar Analogues of SL0101. ACS Med Chem Lett 2015; 6:95-9. [PMID: 25589938 DOI: 10.1021/ml5004525] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 11/26/2014] [Indexed: 11/28/2022] Open
Abstract
The Ser/Thr protein kinase, RSK, is associated with oncogenesis, and therefore, there are ongoing efforts to develop RSK inhibitors that are suitable for use in vivo. SL0101 is a natural product that demonstrates selectivity for RSK inhibition. However, SL0101 has a short biological half-life in vivo. To address this issue we designed a set of eight cyclitol analogues, which should be resistant to acid catalyzed anomeric bond hydrolysis. The analogues were synthesized and evaluated for their ability to selectively inhibit RSK in vitro and in cell-based assays. All the analogues were prepared using a stereodivergent palladium-catalyzed glycosylation/cyclitolization for installing the aglycon. The l-cyclitol analogues were found to inhibit RSK2 in in vitro kinase activity with a similar efficacy to that of SL0101, however, the analogues were not specific for RSK in cell-based assays. In contrast, the d-isomers showed no RSK inhibitory activity in in vitro kinase assay.
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Affiliation(s)
- Mingzong Li
- Department
of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Yu Li
- Department
of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | | | | | - Mingde Shan
- Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Xiwen Song
- Department
of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Bulan Wu
- Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Qi Zhang
- Department
of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | | | - George A. O’Doherty
- Department
of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
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24
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Mrozowski RM, Sandusky ZM, Vemula R, Wu B, Zhang Q, Lannigan DA, O'Doherty GA. De novo synthesis and biological evaluation of C6″-substituted C4″-amide analogues of SL0101. Org Lett 2014; 16:5996-9. [PMID: 25372628 PMCID: PMC4251525 DOI: 10.1021/ol503012k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
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In an effort to improve
upon the in vivo half-life
of the known ribosomal s6 kinase (RSK) inhibitor SL0101, C4″-amide/C6″-alkyl
substituted analogues of SL0101 were synthesized and evaluated in
cell-based assays. The analogues were prepared using a de novo asymmetric
synthetic approach, which featured Pd-π-allylic catalyzed glycosylation
for the introduction of a C4″-azido group. Surprisingly replacement
of the C4″-acetate with a C4″-amide resulted in analogues
that were no longer specific for RSK in cell-based assays.
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Affiliation(s)
- Roman M Mrozowski
- Departments of Pathology, Microbiology & Immunology and ⊥Cancer Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37232, United States
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25
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Kaempferol, a potential cytostatic and cure for inflammatory disorders. Eur J Med Chem 2014; 86:103-12. [PMID: 25147152 DOI: 10.1016/j.ejmech.2014.08.011] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 08/04/2014] [Accepted: 08/04/2014] [Indexed: 12/30/2022]
Abstract
Kaempferol (3,5,7-trihydroxy-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-one) is a flavonoid found in many edible plants (e.g., tea, broccoli, cabbage, kale, beans, endive, leek, tomato, strawberries, and grapes) and in plants or botanical products commonly used in traditional medicine (e.g., Ginkgo biloba, Tilia spp, Equisetum spp, Moringa oleifera, Sophora japonica and propolis). Its anti-oxidant/anti-inflammatory effects have been demonstrated in various disease models, including those for encephalomyelitis, diabetes, asthma, and carcinogenesis. Moreover, kaempferol act as a scavenger of free radicals and superoxide radicals as well as preserve the activity of various anti-oxidant enzymes such as catalase, glutathione peroxidase, and glutathione-S-transferase. The anticancer effect of this flavonoid is mediated through different modes of action, including anti-proliferation, apoptosis induction, cell-cycle arrest, generation of reactive oxygen species (ROS), and anti-metastasis/anti-angiogenesis activities. In addition, kaempferol was found to exhibit its anticancer activity through the modulation of multiple molecular targets including p53 and STAT3, through the activation of caspases, and through the generation of ROS. The anti-tumor effects of kaempferol have also been investigated in tumor-bearing mice. The combination of kaempferol and conventional chemotherapeutic drugs produces a greater therapeutic effect than the latter, as well as reduces the toxicity of the latter. In this review, we summarize the anti-oxidant/anti-inflammatory and anticancer effects of kaempferol with a focus on its molecular targets and the possible use of this flavonoid for the treatment of inflammatory diseases and cancer.
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26
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Aljahdali AZ, Shi P, Zhong Y, O'Doherty GA. De novo asymmetric synthesis of the pyranoses: from monosaccharides to oligosaccharides. Adv Carbohydr Chem Biochem 2014; 69:55-123. [PMID: 24274368 DOI: 10.1016/b978-0-12-408093-5.00004-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The various methods for the de novo asymmetric synthesis of the pyranose sugars are surveyed. The presentation begins with the work of Masamune and Sharpless with the use of the Sharpless asymmetric epoxidation for the synthesis of all eight l-hexoses. The development of other asymmetric reactions and their application for the synthesis of specific hexopyranoses are further discussed. The broad application of the Achmatowicz rearrangement with asymmetric catalysis, for the synthesis of various pyranones and imino sugars, is also presented. Finally, the use of a diastereoselective palladium-catalyzed glycosylation with the Achmatowicz approach for the synthesis of oligosaccharides and applications to medicinal chemistry are discussed.
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Affiliation(s)
- Alhanouf Z Aljahdali
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts, USA
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27
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Trost BM, Masters JT, Lumb JP, Fateen D. Asymmetric synthesis of chiral cycloalkenone derivatives via palladium catalysis. Chem Sci 2014; 5:1354-1360. [PMID: 24761221 PMCID: PMC3992253 DOI: 10.1039/c3sc53250j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 01/13/2014] [Indexed: 12/04/2022] Open
Abstract
The palladium-catalyzed oxidative desymmetrization of meso dibenzoates yields γ-benzoyloxy cycloalkenones in good yields and with excellent levels of enantioselectivity. These compounds serve as precursors to a broad range of substituted cycloalkenones, including well-established synthetic building blocks and elaborated cycloalkanone derivatives. The ability to prepare both enantiomers of the oxidative desymmetrization products enables a unified strategy toward stereochemically diverse epoxyquinoid natural products.
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Affiliation(s)
- Barry M. Trost
- Department of Chemistry , Stanford University , Stanford , CA 94305-4401 , USA .
| | - James T. Masters
- Department of Chemistry , Stanford University , Stanford , CA 94305-4401 , USA .
| | - Jean-Philip Lumb
- Department of Chemistry , Stanford University , Stanford , CA 94305-4401 , USA .
| | - Dahlia Fateen
- Department of Chemistry , Stanford University , Stanford , CA 94305-4401 , USA .
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28
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Vidyasagar A, Sureshan KM. Total Synthesis and Glycosidase Inhibition Studies of (-)-Gabosine J and Its Derivatives. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301782] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Bajaj SO, Sharif EU, Akhmedov NG, O'Doherty GA. De novo asymmetric synthesis of the mezzettiaside family of natural products via the iterative use of a dual B-/Pd-catalyzed glycosylation. Chem Sci 2014; 5:2230-2234. [PMID: 25729559 DOI: 10.1039/c4sc00593g] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The first synthesis of any and all members of the mezzettiaside family of natural products has been achieved. The reported synthesis features the iterative use of the Taylor catalyst in a dual nucleophilic boron/electrophilic palladium catalyzed regioselective glycosylation. In addition, the de novo approach utilizes atomless protecting groups and the minimal use of protecting groups (2 chloroacetates for the synthesis of 10 natural products). These divergent syntheses occurred in a range of 13 to 22 longest linear steps and required only 41 total steps to prepare the entire family of mezzettiasides.
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Affiliation(s)
- Sumit O Bajaj
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115
| | - Ehesan U Sharif
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115
| | - Novruz G Akhmedov
- Department of Chemistry, West Virginia University, Morgantown, WV 26506
| | - George A O'Doherty
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115
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30
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Baran A, Aydin G, Savran T, Sahin E, Balci M. Trisequential Photooxygenation Reaction: Application to the Synthesis of Carbasugars. Org Lett 2013; 15:4350-3. [DOI: 10.1021/ol401823m] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arif Baran
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Gokay Aydin
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Tahir Savran
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Ertan Sahin
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Metin Balci
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
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31
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Yuan J, Zhong Y, Li S, Zhao X, Luan G, Zhao Z, Huang J, Li H, Xu Y. Triazole and Benzotriazole Derivatives as Novel Inhibitors for p90 Ribosomal S6 Protein Kinase 2: Synthesis, Molecular Docking and SAR Analysis. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201300443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Ulbrich K, Kreitmeier P, Vilaivan T, Reiser O. Enantioselective Synthesis of 4-Heterosubstituted Cyclopentenones. J Org Chem 2013; 78:4202-6. [DOI: 10.1021/jo400409f] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kathrin Ulbrich
- Institut für Organische
Chemie, Universitaet Regensburg, Universitätsstrasse
31, 93053 Regensburg, Germany, and
| | - Peter Kreitmeier
- Institut für Organische
Chemie, Universitaet Regensburg, Universitätsstrasse
31, 93053 Regensburg, Germany, and
| | - Tirayut Vilaivan
- Organic Synthesis Research Unit,
Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330,
Thailand
| | - Oliver Reiser
- Institut für Organische
Chemie, Universitaet Regensburg, Universitätsstrasse
31, 93053 Regensburg, Germany, and
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33
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Moens U, Kostenko S, Sveinbjørnsson B. The Role of Mitogen-Activated Protein Kinase-Activated Protein Kinases (MAPKAPKs) in Inflammation. Genes (Basel) 2013; 4:101-33. [PMID: 24705157 PMCID: PMC3899974 DOI: 10.3390/genes4020101] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 03/18/2013] [Accepted: 03/20/2013] [Indexed: 01/18/2023] Open
Abstract
Mitogen-activated protein kinase (MAPK) pathways are implicated in several cellular processes including proliferation, differentiation, apoptosis, cell survival, cell motility, metabolism, stress response and inflammation. MAPK pathways transmit and convert a plethora of extracellular signals by three consecutive phosphorylation events involving a MAPK kinase kinase, a MAPK kinase, and a MAPK. In turn MAPKs phosphorylate substrates, including other protein kinases referred to as MAPK-activated protein kinases (MAPKAPKs). Eleven mammalian MAPKAPKs have been identified: ribosomal-S6-kinases (RSK1-4), mitogen- and stress-activated kinases (MSK1-2), MAPK-interacting kinases (MNK1-2), MAPKAPK-2 (MK2), MAPKAPK-3 (MK3), and MAPKAPK-5 (MK5). The role of these MAPKAPKs in inflammation will be reviewed.
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Affiliation(s)
- Ugo Moens
- Molecular Inflammation Research Group, Department of Medical Biology, Faculty of Health Sciences, University of Tromsø, NO-9037 Tromsø, Norway.
| | - Sergiy Kostenko
- Molecular Inflammation Research Group, Department of Medical Biology, Faculty of Health Sciences, University of Tromsø, NO-9037 Tromsø, Norway.
| | - Baldur Sveinbjørnsson
- Molecular Inflammation Research Group, Department of Medical Biology, Faculty of Health Sciences, University of Tromsø, NO-9037 Tromsø, Norway.
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34
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Shi P, Silva MC, Wang HYL, Wu B, Akhmedov NG, Li M, Beuning PJ, O’Doherty GA. Structure Activity Relationship Study of the Cleistriosides and Cleistetrosides for Antibacterial/Anticancer Activity. ACS Med Chem Lett 2012; 3:1086-1090. [PMID: 23543830 DOI: 10.1021/ml300303g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Two known cleistriosides and six known cleistetrosides were synthesized and evaluated for anticancer and antibacterial activity. This study, for the first time, reports anticancer activity and comprehensively the antibacterial activity for these oligosaccharide natural products. In addition, two new unnatural cleistetroside analogues were synthesized and tested. Biological activities for the ten oligosaccharides against B. subtilis were found to range between 4 and >64 µM, and for NCI-H460 human lung cancer epithelial cells between 7.5 and 90.9 µM. Similar activities were found for seven of the oligosaccharides against the NCI panel of 60 cell lines. The degree of acylation and location of the specific acetate groups had significant effects on the anticancer and antibacterial activity of both the cleistriosides and cleistetrosides.
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Affiliation(s)
- Pei Shi
- Department of Chemistry and
Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Michelle C. Silva
- Department of Chemistry and
Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Hua-Yu Leo Wang
- Department of Chemistry and
Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Bulan Wu
- Department of Chemistry, West Virginia University, Morgantown, West Virginia
26506, United States
| | - Novruz G. Akhmedov
- Department of Chemistry, West Virginia University, Morgantown, West Virginia
26506, United States
| | - Miaosheng Li
- Protea Biosciences, Morgantown, West Virginia 26507,
United States
| | - Penny J. Beuning
- Department of Chemistry and
Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - George A. O’Doherty
- Department of Chemistry and
Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
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35
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Abstract
Having access to mild and operationally simple techniques for attaining carbohydrate targets will be necessary to facilitate advancement in biological, medicinal, and pharmacological research. Even with the abundance of elegant reports for generating glycosidic linkages, stereoselective construction of α- and β-oligosaccharides and glycoconjugates is by no means trivial. In an era where expanded awareness of the impact we are having on the environment drives the state-of-the-art, synthetic chemists are tasked with developing cleaner and more efficient reactions for achieving their transformations. This movement imparts the value that prevention of waste is always superior to its treatment or cleanup. This review will highlight recent advancement in this regard by examining strategies that employ transition metal catalysis in the synthesis of oligosaccharides and glycoconjugates. These methods are mild and effective for constructing glycosidic bonds with reduced levels of waste through utilization of sub-stoichiometric amounts of transition metals to promote the glycosylation.
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Affiliation(s)
- Matthew J. McKay
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Hien M. Nguyen
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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36
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Affiliation(s)
- Xiaohua Li
- a Department of Chemistry and School for Green Chemistry and Engineering , University of Toledo , Toledo , OH , 43606 , USA
| | - Jianglong Zhu
- a Department of Chemistry and School for Green Chemistry and Engineering , University of Toledo , Toledo , OH , 43606 , USA
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37
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Baran A, Çambul S, Nebioglu M, Balci M. Design, synthesis, and biological activities of some branched carbasugars: construction of a substituted 6-oxabicyclo[3.2.1]nonane skeleton. J Org Chem 2012; 77:5086-97. [PMID: 22607049 DOI: 10.1021/jo300655p] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transformation of cyclohexa-2,4-diene-1,2-diylbis(methylene) diacetate to various carbasugars is described. Photooxygenation of a cyclohexadiene derivative gave a bicyclicendoperoxide, which was reduced with thiourea to [2-[(acetyloxy)methyl]cyclohexa-2,4-dien-1-yl]methyl acetate. Epoxidation of the remaining double bond followed by epoxide ring-opening and hydrolysis of the acetate groups gave one of the target hexols. The bicyclic endoperoxide was rearranged to a diepoxide with CoTPP. The diepoxide was reacted with sulfamic acid in acetic anhydride, resulting in the formation of a new branched carbasugar as well as in the formation of cyclitols with a 6-oxabicyclo[3.2.1]nonane skeleton. The mechanism of the formation of the products is discussed. The inhibition activity of six cyclitol derivatives was tested against α-glycosidase.
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Affiliation(s)
- Arif Baran
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey.
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38
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Hilinski MK, Mrozowski RM, Clark DE, Lannigan DA. Analogs of the RSK inhibitor SL0101: optimization of in vitro biological stability. Bioorg Med Chem Lett 2012; 22:3244-7. [PMID: 22464132 DOI: 10.1016/j.bmcl.2012.03.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/05/2012] [Accepted: 03/07/2012] [Indexed: 01/09/2023]
Abstract
The Ser/Thr protein kinase, RSK, is important in the etiology of tumor progression including invasion and motility. The natural product kaempferol-3-O-(3″,4″-di-O-acetyl-α-l-rhamnopyranoside), called SL0101, is a highly specific RSK inhibitor. Acylation of the rhamnose moiety is necessary for high affinity binding and selectivity. However, the acetyl groups can be cleaved by esterases, which accounts for the poor in vitro biological stability of SL0101. To address this problem a series of analogs containing acetyl group replacements were synthesized and their in vitro stability evaluated. Monosubstituted carbamate analogs of SL0101 showed improved in vitro biological stability while maintaining specificity for RSK. These results should facilitate the development of RSK inhibitors derived from SL0101 as anticancer agents.
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Affiliation(s)
- Michael K Hilinski
- Center for Cell Signaling, University of Virginia, Charlottesville, VA 22908, USA.
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39
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Mrozowski RM, Vemula R, Wu B, Zhang Q, Schroeder BR, Hilinski MK, Clark DE, Hecht SM, O’Doherty GA, Lannigan DA. Improving the affinity of SL0101 for RSK using structure-based design. ACS Med Chem Lett 2012; 4:175-179. [PMID: 23519677 DOI: 10.1021/ml300298v] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Enhanced activity of the Ser/Thr protein kinase, RSK, is associated with transformation and metastasis, which suggests that RSK is an attractive drug target. The natural product, SL0101 (kaempferol 3-O-(3″,4″-di-O-acetyl-α-L-rhamnopyranoside), has been shown to be a RSK selective inhibitor. However, the Ki for SL0101 is 1 μM with a half-life of less than 30 min in vivo. To identify analogues with improved efficacy we designed a set of analogues based on the crystallographic model of SL0101 in complex with the RSK2 N-terminal kinase domain. We identified an analogue with a 5″-n-propyl group on the rhamnose that has > 40-fold improved affinity for RSK relative to SL0101 in an in vitro kinase assay. This analogue preferentially inhibited the proliferation of the human breast cancer line, MCF-7, versus the normal untransformed breast line, MCF-10A, which is consistent with results using SL0101. However, the efficacy of the 5″-n-propyl analogue to inhibit MCF-7 proliferation was only two-fold better than for SL0101, which we hypothesize is due to limited membrane permeability. The improved affinity of the 5″-n-propyl analogue for RSK will aid in the design of future compounds for in vivo use.
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Affiliation(s)
- Roman M. Mrozowski
- Department of Pathology, Microbiology & Immunology, Vanderbilt University, Nashville, Tennessee, United States
| | - Rajender Vemula
- Department of Chemistry,
Northeastern
University, Boston, Massachusetts, United States
| | - Bulan Wu
- Department of Chemistry, West
Virginia University, Morgantown, West Virginia, United States
| | - Qi Zhang
- Department of Chemistry,
Northeastern
University, Boston, Massachusetts, United States
| | | | - Michael K. Hilinski
- Department of Microbiology, Immunology & Cancer Biology, University of Virginia, Charlottesville, Virginia, United States
| | - David E. Clark
- Department of Microbiology, Immunology & Cancer Biology, University of Virginia, Charlottesville, Virginia, United States
| | - Sidney M. Hecht
- Center for
BioEnergetics, Biodesign
Institute, Arizona State University, Tempe, Arizona, United States
| | - George A. O’Doherty
- Department of Chemistry,
Northeastern
University, Boston, Massachusetts, United States
| | - Deborah A. Lannigan
- Department of Pathology, Microbiology & Immunology, Vanderbilt University, Nashville, Tennessee, United States
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40
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Wu B, Li M, O'Doherty GA. Synthesis of several cleistrioside and cleistetroside natural products via a divergent de novo asymmetric approach. Org Lett 2010; 12:5466-9. [PMID: 21038879 DOI: 10.1021/ol1023344] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The de novo asymmetric syntheses of several partially acylated dodecanyl tri- and tetra-rhamnoside natural products (cleistriosides-5 and 6 and cleistetrosides-2 to 7) have been achieved (19-24 steps). The divergent route requires the use of three or less protecting groups. The asymmetry was derived via Noyori reduction of an acylfuran. The rhamno-stereochemistry was installed by a diastereoselective palladium-catalyzed glycosylation, ketone reduction and dihydroxylation.
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Affiliation(s)
- Bulan Wu
- Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, USA
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