1
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Yang S, Chen C, Chen J, Li C. Total Synthesis of the Potent and Broad-Spectrum Antibiotics Amycolamicin and Kibdelomycin. J Am Chem Soc 2021; 143:21258-21263. [PMID: 34879199 DOI: 10.1021/jacs.1c11477] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The complex and intriguing structures of the antibiotics amycolamicin and kibdelomycin are herein confirmed through total synthesis. Careful titration of the synthetic products reveals that kibdelomycin is the salt form of amycolamicin. This synthesis employs a highly convergent strategy, which provides a modular approach for further SAR studies of this class of antibiotics.
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Affiliation(s)
- Shaoqiang Yang
- National Institute of Biological Sciences, Beijing, 102206, China
| | - Chenglong Chen
- National Institute of Biological Sciences, Beijing, 102206, China
| | - Jie Chen
- National Institute of Biological Sciences, Beijing, 102206, China.,Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100084, China
| | - Chao Li
- National Institute of Biological Sciences, Beijing, 102206, China.,Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100084, China
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2
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Gulbe K, Lugiņina J, Jansons E, Kinens A, Turks M. Metal-free glycosylation with glycosyl fluorides in liquid SO 2. Beilstein J Org Chem 2021; 17:964-976. [PMID: 33981367 PMCID: PMC8093551 DOI: 10.3762/bjoc.17.78] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 04/17/2021] [Indexed: 11/23/2022] Open
Abstract
Liquid SO2 is a polar solvent that dissolves both covalent and ionic compounds. Sulfur dioxide possesses also Lewis acid properties, including the ability to covalently bind Lewis basic fluoride ions in a relatively stable fluorosulfite anion (FSO2 -). Herein we report the application of liquid SO2 as a promoting solvent for glycosylation with glycosyl fluorides without any external additive. By using various temperature regimes, the method is applied for both armed and disarmed glucose and mannose-derived glycosyl fluorides in moderate to excellent yields. A series of pivaloyl-protected O- and S-mannosides, as well as one example of a C-mannoside, are synthesized to demonstrate the scope of the glycosyl acceptors. The formation of the fluorosulfite species during the glycosylation with glycosyl fluorides in liquid SO2 is proved by 19F NMR spectroscopy. A sulfur dioxide-assisted glycosylation mechanism that proceeds via solvent separated ion pairs is proposed, whereas the observed α,β-selectivity is substrate-controlled and depends on the thermodynamic equilibrium.
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Affiliation(s)
- Krista Gulbe
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena str. 3, Riga, LV-1048, Latvia
| | - Jevgeņija Lugiņina
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena str. 3, Riga, LV-1048, Latvia
| | - Edijs Jansons
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena str. 3, Riga, LV-1048, Latvia
| | - Artis Kinens
- Latvian Institute of Organic Synthesis, Aizkraukles str. 21, Riga, LV-1006, Latvia.,Department of Chemistry, University of Latvia, Jelgavas str. 1, Riga, LV-1004, Latvia
| | - Māris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena str. 3, Riga, LV-1048, Latvia
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3
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Ahmad N, Xu K, Wang JN, Li C. Novel catalytic glycosylation of Glycyrrhetinic acid by UDP-glycosyltransferases from Bacillus subtilis. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107723] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Chen J, Pantawane AR, Huang P, Liu J, Sankar A, Lin Y, Liu Y, Wu H, Luo S. One‐Pot Protection Strategy of Glucosamine to Assemble Building Blocks of Chitosan and Lipid A. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000923] [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)
- Jyun‐Siao Chen
- Department of Chemistry National Chung Hsing University 402 Taichung Taiwan
| | | | - Po‐Hsun Huang
- Department of Chemistry National Chung Hsing University 402 Taichung Taiwan
| | - Jen‐Wei Liu
- Department of Chemistry National Chung Hsing University 402 Taichung Taiwan
| | - Arumugam Sankar
- Department of Chemistry National Chung Hsing University 402 Taichung Taiwan
| | - Yi‐Jyun Lin
- Department of Chemistry National Chung Hsing University 402 Taichung Taiwan
| | - Yu‐Hao Liu
- National Chutung Senior High School 310 Hsinchu Taiwan
| | - Hsin‐Ru Wu
- Instrumentation Center, MOST National Tsing Hua University 300 Hsinchu Taiwan
| | - Shun‐Yuan Luo
- Department of Chemistry National Chung Hsing University 402 Taichung Taiwan
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5
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Gao Y, Zhang L, Feng X, Liu X, Guo F, Lv B, Li C. Galactosylation of Monosaccharide Derivatives of Glycyrrhetinic Acid by UDP-Glycosyltransferase GmSGT2 from Glycine max. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:8580-8588. [PMID: 32689796 DOI: 10.1021/acs.jafc.0c03842] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Glycyrrhetinic acid (GA), a pentacyclic triterpenoid aglycone, is the major functional component in licorice which mainly exists in the form of functional glycosides in licorice. The introduction of a sugar moiety to the C-3 OH of GA to yield glycosylated derivatives has been reported, but the late-stage glycosylation of GA-3-O-sugar to form rare GA glycosides with more complexed glycosyl decoration has been rarely reported. In this study, a unique UDP-galactosyltransferase GmSGT2 from Glycine max was found to transfer a galactose to the C2 position of the sugar moiety of GA-3-O-monoglucuronide (GAMG) and GA-3-O-monoglucose. In addition to UDP-galactose, GmSGT2 also recognizes UDP-glucose, UDP-xylose, and UDP-arabinose with relative activities of 32.1-89.2%. Based on a test of 12 typical natural products, GmSGT2 showed high specificity toward the pentacyclic triterpenoid skeleton as the sugar acceptor. Molecular docking was performed to elucidate the substrate recognition mechanism of GmSGT2 toward GAMG.
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Affiliation(s)
- Yanan Gao
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
| | - Liang Zhang
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Xudong Feng
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Xiaofei Liu
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Fang Guo
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Bo Lv
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Chun Li
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
- Key Lab for Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
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6
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Kumari P, Mishra VS, Narayana C, Khanna A, Chakrabarty A, Sagar R. Design and efficient synthesis of pyrazoline and isoxazole bridged indole C-glycoside hybrids as potential anticancer agents. Sci Rep 2020; 10:6660. [PMID: 32313038 PMCID: PMC7170901 DOI: 10.1038/s41598-020-63377-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 03/23/2020] [Indexed: 01/26/2023] Open
Abstract
C-glycosides are important class of molecules exhibit diverse biological activities and present as structural motif in many natural products. Two series of new pyrazoline and isoxazole bridged indole C-glycoside molecular hybrids (n = 36) were efficiently synthesized starting from diverse indole 3-carboxaldehydes derived α, β-unsaturated ketone derivatives of β-D-glucosyl-propan-2-one, β-D-galactosyl-propan-2-one and β-D-mannosyl-propan-2-one, reacting with hydrazine hydrate and hydroxyl amine hydrochloride in shorter reaction time (15 min) under microwave assisted condition. Anticancer activity of these newly synthesized pyrazoline and isoxazole bridged indoles C-glycoside hybrids were determined in details through cellular assays against MCF-7, MDA-MB-453 and MDA-MB-231 cancer cell lines. The selected library members displayed low micromolar (IC50 = 0.67–4.67 µM) and selective toxicity against breast cancer cell line (MCF-7). Whereas these compounds were nontoxic towards normal cell line (MCF-10A). Mechanistic studies showed that, active compounds inhibit COX-2 enzyme, which was also supported by molecular docking studies. These findings are expected to provide new leads towards anticancer drug discovery.
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Affiliation(s)
- Priti Kumari
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University (SNU), NH91, Tehsil-Dadri, Gautam Buddha Nagar, Uttar Pradesh, 201314, India
| | - Vishnu S Mishra
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University (SNU), NH91, Tehsil-Dadri, Gautam Buddha Nagar, Uttar Pradesh, 201314, India
| | - Chintam Narayana
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University (SNU), NH91, Tehsil-Dadri, Gautam Buddha Nagar, Uttar Pradesh, 201314, India
| | - Ashish Khanna
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Anindita Chakrabarty
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University (SNU), NH91, Tehsil-Dadri, Gautam Buddha Nagar, Uttar Pradesh, 201314, India
| | - Ram Sagar
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University (SNU), NH91, Tehsil-Dadri, Gautam Buddha Nagar, Uttar Pradesh, 201314, India. .,Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India.
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7
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Kulkarni SS, Wang CC, Sabbavarapu NM, Podilapu AR, Liao PH, Hung SC. "One-Pot" Protection, Glycosylation, and Protection-Glycosylation Strategies of Carbohydrates. Chem Rev 2018; 118:8025-8104. [PMID: 29870239 DOI: 10.1021/acs.chemrev.8b00036] [Citation(s) in RCA: 197] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Carbohydrates, which are ubiquitously distributed throughout the three domains of life, play significant roles in a variety of vital biological processes. Access to unique and homogeneous carbohydrate materials is important to understand their physical properties, biological functions, and disease-related features. It is difficult to isolate carbohydrates in acceptable purity and amounts from natural sources. Therefore, complex saccharides with well-defined structures are often most conviently accessed through chemical syntheses. Two major hurdles, regioselective protection and stereoselective glycosylation, are faced by carbohydrate chemists in synthesizing these highly complicated molecules. Over the past few years, there has been a radical change in tackling these problems and speeding up the synthesis of oligosaccharides. This is largely due to the development of one-pot protection, one-pot glycosylation, and one-pot protection-glycosylation protocols and streamlined approaches to orthogonally protected building blocks, including those from rare sugars, that can be used in glycan coupling. In addition, new automated strategies for oligosaccharide syntheses have been reported not only for program-controlled assembly on solid support but also by the stepwise glycosylation in solution phase. As a result, various sugar molecules with highly complex, large structures could be successfully synthesized. To summarize these recent advances, this review describes the methodologies for one-pot protection and their one-pot glycosylation into the complex glycans and the chronological developments associated with automated syntheses of oligosaccharides.
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Affiliation(s)
- Suvarn S Kulkarni
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai 400076 , India
| | | | | | - Ananda Rao Podilapu
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai 400076 , India
| | - Pin-Hsuan Liao
- Institute of Chemistry , Academia Sinica , Taipei 115 , Taiwan
| | - Shang-Cheng Hung
- Genomics Research Center , Academia Sinica , Taipei 115 , Taiwan
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8
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Liu X, Zhang L, Feng X, Lv B, Li C. Biosynthesis of Glycyrrhetinic Acid-3-O-monoglucose Using Glycosyltransferase UGT73C11 from Barbarea vulgaris. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b03391] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xiaochen Liu
- Institute for Biotransformation and
Synthetic Biosystem, Department of Biological Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Liang Zhang
- Institute for Biotransformation and
Synthetic Biosystem, Department of Biological Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Xudong Feng
- Institute for Biotransformation and
Synthetic Biosystem, Department of Biological Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Bo Lv
- Institute for Biotransformation and
Synthetic Biosystem, Department of Biological Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Chun Li
- Institute for Biotransformation and
Synthetic Biosystem, Department of Biological Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
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9
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L. Arruda E, S. Nunes E, de M. Souza PL, B. Japiassú K, C. de Carvalho T, G. Vaz B, M. Lião L, de Oliveira V. A single-step O-glycosylation of azidothymidine in bioreactor catalysed by filamentous fungi. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.08.050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Sun L, Chen D, Chen R, Xie K, Liu J, Yang L, Dai J. Exploring the aglycon promiscuity of a new glycosyltransferase from Pueraria lobata. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.02.088] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Yamanoi T, Oda Y, Ishiyama T, Watanabe M. Stereoselectivity of D-Psicofuranosylation Influenced by Protecting Groups of Psicofuranosyl Donors. HETEROCYCLES 2016. [DOI: 10.3987/com-15-s(t)39] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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12
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Christmann M, Hu J, Kitamura M, Stoltz B. Tetrahedron reports on organic chemistry. Tetrahedron 2015. [DOI: 10.1016/s0040-4020(15)00744-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Synthesis and characterization of four novel 2-(trimethylsilyl)ethyl glycosides. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-013-1257-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Yang Y, Zhang X, Yu B. O-Glycosylation methods in the total synthesis of complex natural glycosides. Nat Prod Rep 2015; 32:1331-55. [DOI: 10.1039/c5np00033e] [Citation(s) in RCA: 134] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We highlight the total syntheses of 33 complex natural O-glycosides, with a particular focus on the O-glycosylation methods that enable the connection of the saccharides and aglycones.
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Affiliation(s)
- You Yang
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xiaheng Zhang
- State Key Laboratory of Bio-organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Biao Yu
- State Key Laboratory of Bio-organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
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15
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Marzag H, Robert G, Dufies M, Bougrin K, Auberger P, Benhida R. FeCl3-promoted and ultrasound-assisted synthesis of resveratrol O-derived glycoside analogs. ULTRASONICS SONOCHEMISTRY 2015; 22:15-21. [PMID: 24961448 DOI: 10.1016/j.ultsonch.2014.05.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 05/23/2014] [Accepted: 05/26/2014] [Indexed: 06/03/2023]
Abstract
Phenol derived O-glycosides were synthesized using a direct and convenient O-glycosidation, starting from acetylated sugars in the presence of FeCl3, an inexpensive, mild and benign Lewis acid catalyst. The reactions were carried out under both conventional and ultrasonic irradiation conditions. In general, improvement in rates and yields were observed when reactions were carried out under sonication compared with conventional conditions leading to the corresponding β-O-glycosides as the major anomer. Post-synthetic transformations of iodophenol intermediates led to new resveratrol O-glycoside analogs in good overall yields.
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Affiliation(s)
- Hamid Marzag
- Institut de Chimie de Nice UMR CNRS 7272, Université Nice-Sophia Antipolis, Parc Valrose, 06108 Nice Cedex 2, France; Laboratoire de Chimie des Plantes et de Synthèse Organique et Bioorganique, URAC23, Université Mohammed V-Agdal, Faculté des Sciences, B.P. 1014 Rabat, Morocco
| | - Guillaume Robert
- Centre Méditérranéen de Médecine Moléculaire UMR INSERM U1065, Equipe 2 Cell Death Differentiation and Cancer, Equipe Labellisée par la Ligue Nationale contre le Cancer, Université de Nice-Sophia Antipolis, C3M - Bâtiment ARCHIMED 151 route Saint Antoine de Ginestière, 06204 Nice, France
| | - Maeva Dufies
- Centre Méditérranéen de Médecine Moléculaire UMR INSERM U1065, Equipe 2 Cell Death Differentiation and Cancer, Equipe Labellisée par la Ligue Nationale contre le Cancer, Université de Nice-Sophia Antipolis, C3M - Bâtiment ARCHIMED 151 route Saint Antoine de Ginestière, 06204 Nice, France
| | - Khalid Bougrin
- Laboratoire de Chimie des Plantes et de Synthèse Organique et Bioorganique, URAC23, Université Mohammed V-Agdal, Faculté des Sciences, B.P. 1014 Rabat, Morocco
| | - Patrick Auberger
- Centre Méditérranéen de Médecine Moléculaire UMR INSERM U1065, Equipe 2 Cell Death Differentiation and Cancer, Equipe Labellisée par la Ligue Nationale contre le Cancer, Université de Nice-Sophia Antipolis, C3M - Bâtiment ARCHIMED 151 route Saint Antoine de Ginestière, 06204 Nice, France
| | - Rachid Benhida
- Institut de Chimie de Nice UMR CNRS 7272, Université Nice-Sophia Antipolis, Parc Valrose, 06108 Nice Cedex 2, France.
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16
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Qian B, Qiao C, Xie Y, Huang H. Iron-Catalyzed Alkenylation of Isochroman Acetals with Simple Alkenes. ChemCatChem 2014. [DOI: 10.1002/cctc.201402785] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Komor K, Szeja W, Bieg T, Kuźnik N, Pastuch-Gawołek G, Komor R. An approach for disaccharide chiron synthesis using a Ferrier-type rearrangement. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Lei H, Yan J, Yu J, Liu Y, Wang Z, Xu Z, Ye T. Total Synthesis and Stereochemical Reassignment of Mandelalide A. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403542] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Honghui Lei
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055 (China)
| | - Jialei Yan
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055 (China)
| | - Jie Yu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055 (China)
| | - Yuqing Liu
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong (China)
| | - Zhuo Wang
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong (China)
| | - Zhengshuang Xu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055 (China)
| | - Tao Ye
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong (China)
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19
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Lei H, Yan J, Yu J, Liu Y, Wang Z, Xu Z, Ye T. Total Synthesis and Stereochemical Reassignment of Mandelalide A. Angew Chem Int Ed Engl 2014; 53:6533-7. [DOI: 10.1002/anie.201403542] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Honghui Lei
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055 (China)
| | - Jialei Yan
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055 (China)
| | - Jie Yu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055 (China)
| | - Yuqing Liu
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong (China)
| | - Zhuo Wang
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong (China)
| | - Zhengshuang Xu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055 (China)
| | - Tao Ye
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong (China)
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20
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Qu H, Sun W, Zhang Y, Sollogoub M, Zhang Y. Synthesis and NMR elucidation of four novel 2-(trimethylsilyl)ethyl glycosides. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-013-1060-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Romo JM, Gálvez E, Nubiola I, Romea P, Urpí F, Kindred M. Diastereoselective Methyl Orthoformate Alkylations of ChiralN-Acylthiazolidinethiones Catalyzed by Nickel(II) Complexes. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300521] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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22
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Xiang S, Lu Z, He J, Le MaiHoang K, Zeng J, Liu XW. β-Type Glycosidic Bond Formation by Palladium-Catalyzed Decarboxylative Allylation. Chemistry 2013; 19:14047-51. [DOI: 10.1002/chem.201303241] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Indexed: 11/12/2022]
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23
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Tietze LF, Dietz S, Schützenmeister N, Biller S, Hierold J, Scheffer T, Baag MM. Selective Glycosylation with the Amino SugarD-Forosamine for the Synthesis of Spinosyns and Its Analogues. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300983] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Stoltz B, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2013. [DOI: 10.1016/s0040-4020(13)01252-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Sharma RK, Singh S, Tiwari R, Mandal D, Olsen CE, Parmar VS, Parang K, Prasad AK. O-Aryl α,β-d-ribofuranosides: Synthesis & highly efficient biocatalytic separation of anomers and evaluation of their Src kinase inhibitory activity. Bioorg Med Chem 2012; 20:6821-30. [DOI: 10.1016/j.bmc.2012.09.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 09/26/2012] [Accepted: 09/27/2012] [Indexed: 01/20/2023]
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26
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Yu B, Sun J, Yang X. Assembly of naturally occurring glycosides, evolved tactics, and glycosylation methods. Acc Chem Res 2012; 45:1227-36. [PMID: 22493991 DOI: 10.1021/ar200296m] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Glycosylation of proteins and lipids is critical to many life processes. Secondary metabolites (or natural products), such as flavonoids, steroids, triterpenes, and antibiotics, are also frequently modified with saccharides. The resulting glycosides include diverse structures and functions, and some of them have pharmacological significance. The saccharide portions of the glycosides often have specific structural characteristics that depend on the aglycones. These molecules also form heterogeneous "glycoform" mixtures where molecules have similar glycosidic linkages but the saccharides vary in the length and type of monosaccharide unit. Thus, it is difficult to purify homogeneous glycosides in appreciable amounts from natural sources. Chemical synthesis provides a feasible access to the homogeneous glycosides and their congeners. Synthesis of a glycoside involves the synthesis of the aglycone, the saccharide, the connection of these two parts, and the overall manipulation of protecting groups. However, most synthetic efforts to date have focused on the aglycones, treating the attachment of saccharides onto the aglycones as a dispensable topic. The synthesis of the aglycone and the synthesis of the saccharide belong to two independent categories of chemistry, and different types of the aglycones and saccharides pose as specific synthetic subjects in their own disciplines. The only reaction that integrates the broad chemistry of glycoside synthesis is the glycosidic bond formation between the saccharide and the aglycone. Focusing on this glycosylation reaction in this Account, we string together our experience with the synthesis of the naturally occurring glycosides. We briefly describe the synthesis of 18 glycosides, including glycolipids, phenolic glycosides, steroid glycosides, and triterpene glycosides. Each molecule represents a prototypical structure of a family of the natural glycosides with interesting biological activities, and we emphasize the general tactics for the synthesis of these diverse structures. We provide a rationale for four tactics for the synthesis of glycosides, based on the stage at which the glycosidic bond is formed between the saccharide and the aglycone. This choice of tactic determines the success or failure of a synthesis, and the flexibility and the overall efficiency of the synthesis as well. Toward the synthesis of heterogeneous glycoform mixtures, we discuss successive and random glycosylation reactions. Finally, we have developed two new glycosylation protocols that address the challenges in the glycosylation of aglycones that are poorly nucleophilic, extremely acid labile, or extremely electrophilic. One of these new protocols takes advantage of glycosyl trifluoroacetimidate donors, and a second protocol uses gold(I)-catalyzed glycosylation with glycosyl ortho-alkynylbenzoate donors.
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Affiliation(s)
- Biao Yu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
| | - Jiansong Sun
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
| | - Xiaoyu Yang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
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Wang J, Li Q, Ge Z, Li R. A versatile and convenient route to ketone C-pyranosides and ketone C-furanosides from unprotected sugars. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.029] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Jack Lu Y, Liu Y, Prashad M, Shieh WC. Synthesis of Vildagliptin-β-<i>O</i>-Glucuronide. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/aces.2012.23045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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Kumar A, Kumar V, Dere RT, Schmidt RR. Glycoside Bond Formation via Acid–Base Catalysis. Org Lett 2011; 13:3612-5. [DOI: 10.1021/ol201231v] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amit Kumar
- Fachbereich Chemie, Universität Konstanz, Fach 725, D-78457 Konstanz, Germany
| | - Vipin Kumar
- Fachbereich Chemie, Universität Konstanz, Fach 725, D-78457 Konstanz, Germany
| | - Ravindra T. Dere
- Fachbereich Chemie, Universität Konstanz, Fach 725, D-78457 Konstanz, Germany
| | - Richard R. Schmidt
- Fachbereich Chemie, Universität Konstanz, Fach 725, D-78457 Konstanz, Germany
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31
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Stoltz B, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2011. [DOI: 10.1016/s0040-4020(11)00770-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Kajjout M, Rolando C. Regiospecific synthesis of quercetin O-β-d-glucosylated and O-β-d-glucuronidated isomers. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.03.110] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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33
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Aly AA, Behalo MS. Synthesis of New Peptidyl- and Glycosylpyrimidine Derivatives. JOURNAL OF CHEMICAL RESEARCH 2011. [DOI: 10.3184/174751911x13083314900282] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A new series of 2- N-(phthalyl- or tosylamino acid)pyrimidines have been synthesised from the coupling of pyrimidine derivatives with phthalyl- or tosylamino acids. Hydrazinolysis of 2- N-phthalyl derivatives afforded unprotected amino acid derivatives. New derivatives of peptidylpyrimidines have been synthesised from the reaction of pyrimidine derivatives with α-amino acids methyl ester hydrochloride viz different routes. Also, new glycosides have been prepared from the reaction of pyrimidine derivatives with α-D-glucopyranosyl bromide. Most of the synthesised compounds showed a significant antimicrobial activity.
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Affiliation(s)
- Aly A. Aly
- Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
| | - Mohamed S. Behalo
- Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
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34
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Ellermann M, Paulini R, Jakob‐Roetne R, Lerner C, Borroni E, Roth D, Ehler A, Schweizer WB, Schlatter D, Rudolph MG, Diederich F. Molecular Recognition at the Active Site of Catechol‐
O
‐methyltransferase (COMT): Adenine Replacements in Bisubstrate Inhibitors. Chemistry 2011; 17:6369-81. [DOI: 10.1002/chem.201003648] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Indexed: 12/29/2022]
Affiliation(s)
- Manuel Ellermann
- Laboratorium für Organische Chemie, ETH‐Zürich, Wolfgang‐Pauli‐Strasse 10, 8093 Zürich (Switzerland), Fax: (+41) 1‐632‐1109
| | - Ralph Paulini
- Laboratorium für Organische Chemie, ETH‐Zürich, Wolfgang‐Pauli‐Strasse 10, 8093 Zürich (Switzerland), Fax: (+41) 1‐632‐1109
| | - Roland Jakob‐Roetne
- Pharma Division, Präklinische Forschung, F. Hoffmann‐La Roche AG, 4070 Basel (Switzerland)
| | - Christian Lerner
- Pharma Division, Präklinische Forschung, F. Hoffmann‐La Roche AG, 4070 Basel (Switzerland)
| | - Edilio Borroni
- Pharma Division, Präklinische Forschung, F. Hoffmann‐La Roche AG, 4070 Basel (Switzerland)
| | - Doris Roth
- Pharma Division, Präklinische Forschung, F. Hoffmann‐La Roche AG, 4070 Basel (Switzerland)
| | - Andreas Ehler
- Pharma Division, Präklinische Forschung, F. Hoffmann‐La Roche AG, 4070 Basel (Switzerland)
| | - W. Bernd Schweizer
- Laboratorium für Organische Chemie, ETH‐Zürich, Wolfgang‐Pauli‐Strasse 10, 8093 Zürich (Switzerland), Fax: (+41) 1‐632‐1109
| | - Daniel Schlatter
- Pharma Division, Präklinische Forschung, F. Hoffmann‐La Roche AG, 4070 Basel (Switzerland)
| | - Markus G. Rudolph
- Pharma Division, Präklinische Forschung, F. Hoffmann‐La Roche AG, 4070 Basel (Switzerland)
| | - François Diederich
- Laboratorium für Organische Chemie, ETH‐Zürich, Wolfgang‐Pauli‐Strasse 10, 8093 Zürich (Switzerland), Fax: (+41) 1‐632‐1109
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35
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Zhu H, Dai P, Zhang W, Chen E, Han W, Chen C, Cui Y. Enzymic synthesis of gastrodin through microbial transformation and purification of gastrodin biosynthesis enzyme. Biol Pharm Bull 2011; 33:1680-4. [PMID: 20930375 DOI: 10.1248/bpb.33.1680] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Gastrodin, a major bioactive component of a famous Chinese herb Gastrodia elata B1., has diverse pharmaceutical functions. It is usually obtained by extraction from a plant or through chemical synthesis. However, traditional extraction from Gastrodia elata B1. is time and money consuming, while chemical synthesis is a complicated procedure and always leads to very serious environmental pollution. Thus it is urgent to explore a new gastrodin source which is more economical and environmental. The present study reports a novel approach to the production of gastrodin through biosynthesis and microbial transformation. Rhizopus chinensis SAITO AS3.1165 was screened from about 50 fungal and bacterial strains and found capable of biotransforming p-hydroxybenzaldehyde into gastrodin for use in gastrodin production. A series of purification steps including (NH(4))(2)SO(4) precipitation, ion exchange chromatography and gel filtration column chromatography was successfully used for purification of the gastrodin biosynthesis enzyme (GBE). The purity of GBE was above 95% and its molecular weight was about 63.2 kDa. We further characterized GBE's function condition, and found that the optimal temperature was 50 °C and the optimum pH 6.0. The enzyme was stable at a temperature lower than 50 °C and a pH between 6.0 and 9.0. The result indicated that gastrodin could be successfully synthesized by microbial transformation, providing a new approach for gastrodin production.
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Affiliation(s)
- Hongli Zhu
- College of Life Science, Northwest University, Xi’an 710069, China
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36
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Chao SJ, Geng MJ, Wang YL. Synthesis and Antibacterial Activities of New S-glycosides Bearing 1,2,4-Triazole. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2010. [DOI: 10.5012/jkcs.2010.54.6.731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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37
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Stoltz B, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2010. [DOI: 10.1016/s0040-4020(10)01735-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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38
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Senthil Kumar R, Karthikeyan K, Phani Kumar B, Muralidharan D, Perumal P. Synthesis of densely functionalised C-glycosides by a tandem oxy Michael addition–Wittig olefination pathway. Carbohydr Res 2010; 345:457-61. [DOI: 10.1016/j.carres.2009.12.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Revised: 11/19/2009] [Accepted: 12/14/2009] [Indexed: 10/20/2022]
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39
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Wang Y, Zhang X, Wang P. Facile glycosylation strategy with two-stage activation of allyl glycosyl donors. Application to concise synthesis of Shigella flexneri serotype Y O-antigen. Org Biomol Chem 2010; 8:4322-8. [DOI: 10.1039/c002865g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Nambu H, Nakamura S, Suzuki N, Hashimoto S. Stereocontrolled Construction of 1,2-cis-α-Glycosidic Linkages Using Glycosyl Diphenyl Phosphates and Synthesis of α-Galactosylceramide KRN7000. TRENDS GLYCOSCI GLYC 2010. [DOI: 10.4052/tigg.22.26] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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41
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Bay S, Fort S, Birikaki L, Ganneau C, Samain E, Coïc YM, Bonhomme F, Dériaud E, Leclerc C, Lo-Man R. Induction of a melanoma-specific antibody response by a monovalent, but not a divalent, synthetic GM2 neoglycopeptide. ChemMedChem 2009; 4:582-7. [PMID: 19226501 DOI: 10.1002/cmdc.200900032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The GM2 ganglioside represents an important target for specific anticancer immunotherapy. We designed and synthesized a neoglycopeptide immunogen displaying one or two copies of the GM2 tetrasaccharidic moiety. These glycopeptides were prepared using the Huisgen cycloaddition, which enables the efficient ligation of the alkyne-functionalized biosynthesized GM2 with an azido CD4(+) T cell epitope peptide. It is worth noting that the GM2 can be produced on a gram scale in bacteria, which can be advantageous for a scale-up of the process. We show here for the first time that a fully synthetic glycopeptide, which is based on a ganglioside carbohydrate moiety, can induce human tumor cell-specific antibodies after immunization in mice. Interestingly, the monovalent, but not the divalent, form of GM2 peptide construct induced antimelanoma antibodies. Unlike traditional vaccines, this vaccine is a pure chemically-defined entity, a key quality for consistent studies and safe clinical evaluation. Therefore, such carbohydrate-peptide conjugate represents a promising cancer vaccine strategy for active immunotherapy targeting gangliosides.
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Affiliation(s)
- S Bay
- Institut Pasteur, Unité de Chimie des Biomolécules, URA CNRS, Paris, France.
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42
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Efimtseva EV, Kulikova IV, Mikhailov SN. Disaccharide nucleosides as an important group of natural compounds. Mol Biol 2009. [DOI: 10.1134/s0026893309020125] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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43
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Yokoyama Y, Inanaga J, Hanamoto T, Suzuki S, Furuno H, Shimizu K. Tandem Catalysis Strategy for Direct Glycosylation of 1-Hydroxy Sugars. Methoxyacetic Acid as an Effective Catalytic Mediator. HETEROCYCLES 2009. [DOI: 10.3987/com-08-s(d)74] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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44
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Ko YJ, Shim SB, Shin JH. Facile Synthesis of 2-O-Iodoacetyl Protected Glycosyl Iodides: Useful Precursors of 1→2-Linked 1,2-trans-Glycosides. Org Lett 2008; 11:609-12. [DOI: 10.1021/ol8026472] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yoon-Joo Ko
- National Center for Inter-University Research Facilities, Seoul National University, Seoul, 151-747, Korea
| | - Seung-Bo Shim
- National Center for Inter-University Research Facilities, Seoul National University, Seoul, 151-747, Korea
| | - Jung-Hyu Shin
- National Center for Inter-University Research Facilities, Seoul National University, Seoul, 151-747, Korea
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45
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Takahashi D, Tanaka H, Nakane E, Takahashi T. The Synthesis of Carbohydrate Microarrays by S-Alkylation of the Glass-supported 2-Bromoacetamides. CHEM LETT 2008. [DOI: 10.1246/cl.2008.1252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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47
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Gudmundsdottir AV, Nitz M. Protecting group free glycosidations using p-toluenesulfonohydrazide donors. Org Lett 2008; 10:3461-3. [PMID: 18616337 DOI: 10.1021/ol801232f] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
N'-Glycopyranosylsulfonohydrazides are introduced as glycosyl donors for protecting group free synthesis of O-glycosides, glycosyl azides, and oxazolines. Mono- and disaccharides containing a reducing terminal N-acetylglucosamine residue were condensed with p-toluenesulfonylhydrazide to give the desired beta- d-pyranose donors. These donors can be activated with NBS and then glycosidated with the desired alcohol or transformed to the oxazoline or glycosyl azide.
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48
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Reisman SE, Doyle AG, Jacobsen EN. Enantioselective thiourea-catalyzed additions to oxocarbenium ions. J Am Chem Soc 2008; 130:7198-9. [PMID: 18479086 PMCID: PMC2574628 DOI: 10.1021/ja801514m] [Citation(s) in RCA: 372] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Asymmetric, catalytic reactions of oxocarbenium ions are reported. Simple, chiral urea and thiourea derivatives are shown to catalyze the enantioselective substitution of silyl ketene acetals onto 1-chloroisochromans. A mechanism involving anion binding by the chiral catalyst to generate a reactive oxocarbenium ion is invoked. Catalysts bearing tertiary benzylic amide groups afforded highest enantioselectivities, with the optimal structure being derived from enantioenriched 2-arylpyrrolidine derivatives.
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Affiliation(s)
- Sarah E Reisman
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
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49
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Tetrahedron reports on organic chemistry. Tetrahedron 2008. [DOI: 10.1016/s0040-4020(08)00897-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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50
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Leonelli F, Capuzzi M, Bodo E, Passacantilli P, Piancatelli G. Synthesis of new 2-phosphono-α-d-glycoside derivatives by stereoselective oxa-Michael addition to a d-galacto derived enone. Carbohydr Res 2008; 343:1133-41. [DOI: 10.1016/j.carres.2008.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Revised: 02/28/2008] [Accepted: 03/06/2008] [Indexed: 10/22/2022]
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