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Seliger H, Sanghvi YS. An Update on Protection of 5'-Hydroxyl Functions of Nucleosides and Oligonucleotides. Curr Protoc 2024; 4:e999. [PMID: 38439607 DOI: 10.1002/cpz1.999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
The synthesis of natural and chemically modified nucleosides and oligonucleotides is in great demand due to its increasing number of applications in diverse areas of research. These include tools for diagnostics and proteomics, research reagents for molecular biology, probes for functional genomics, and the design, discovery, development, and manufacture of new therapeutics. The likelihood of success in synthesizing these molecules is often dependent on the correct choice of a protection strategy to block the 5'-hydroxyl group of a carbohydrate moiety, nucleoside, or oligonucleotide. This topic was reviewed extensively in the year 2000. The purpose of this article is to complement and update the original review with recently published methodologies recommended for the protection and deprotection of the 5'-hydroxyl group. © 2024 Wiley Periodicals LLC.
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Herczeg M, Demeter F, Nagy T, Rusznyák Á, Hodek J, Sipos É, Lekli I, Fenyvesi F, Weber J, Kéki S, Borbás A. Block Synthesis and Step-Growth Polymerization of C-6-Sulfonatomethyl-Containing Sulfated Malto-Oligosaccharides and Their Biological Profiling. Int J Mol Sci 2024; 25:677. [PMID: 38203849 PMCID: PMC10779578 DOI: 10.3390/ijms25010677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 12/30/2023] [Accepted: 12/31/2023] [Indexed: 01/12/2024] Open
Abstract
Highly sulfated malto-oligomers, similar to heparin and heparan-sulfate, have good antiviral, antimetastatic, anti-inflammatory and cell growth inhibitory effects. Due to their broad biological activities and simple structure, sulfated malto-oligomer derivatives have a great therapeutic potential, therefore, the development of efficient synthesis methods for their production is of utmost importance. In this work, preparation of α-(1→4)-linked oligoglucosides containing a sulfonatomethyl moiety at position C-6 of each glucose unit was studied by different approaches. Malto-oligomeric sulfonic acid derivatives up to dodecasaccharides were prepared by polymerization using different protecting groups, and the composition of the product mixtures was analyzed by MALDI-MS methods and size-exclusion chromatography. Synthesis of lower oligomers was also accomplished by stepwise and block synthetic methods, and then the oligosaccharide products were persulfated. The antiviral, anti-inflammatory and cell growth inhibitory activity of the fully sulfated malto-oligosaccharide sulfonic acids were determined by in vitro tests. Four tested di- and trisaccharide sulfonic acids effectively inhibited the activation of the TNF-α-mediated inflammatory pathway without showing cytotoxicity.
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Affiliation(s)
- Mihály Herczeg
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
| | - Fruzsina Demeter
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
| | - Tibor Nagy
- Department of Applied Chemistry, Faculty of Science and Technology, Institute of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (T.N.); (S.K.)
| | - Ágnes Rusznyák
- Department of Molecular and Nanopharmaceutics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (Á.R.); (F.F.)
- Institute of Healthcare Industry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Jan Hodek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague, Czech Republic; (J.H.); (J.W.)
| | - Éva Sipos
- Department of Pharmacodynamics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (É.S.); (I.L.)
| | - István Lekli
- Department of Pharmacodynamics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (É.S.); (I.L.)
| | - Ferenc Fenyvesi
- Department of Molecular and Nanopharmaceutics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (Á.R.); (F.F.)
| | - Jan Weber
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague, Czech Republic; (J.H.); (J.W.)
| | - Sándor Kéki
- Department of Applied Chemistry, Faculty of Science and Technology, Institute of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (T.N.); (S.K.)
| | - Anikó Borbás
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
- HUN-REN-UD Molecular Recognition and Interaction Research Group, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
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3
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Escopy S, Demchenko AV. Transition-Metal-Mediated Glycosylation with Thioglycosides. Chemistry 2021; 28:e202103747. [PMID: 34935219 DOI: 10.1002/chem.202103747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Indexed: 11/09/2022]
Abstract
Thioglycosides are among the most common glycosyl donors that find broad application in the synthesis of glycans and glycoconjugates. However, the requirement for toxic and/or large access of activators needed for common glycosylations with thioglycosides remains a notable drawback. Due to the increased awareness of the chemical waste impact on the environment, synthetic studies have been driven by the goal of finding non-toxic reagents. The main focus of this review is to highlight recent methods for thioglycoside activation that rely on transition metal catalysis.
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Affiliation(s)
- Samira Escopy
- University of Missouri - St. Louis, Chemistry, UNITED STATES
| | - Alexei V Demchenko
- Saint Louis University, Chemistry, 3501 Laclede Ave, 63103, St. Louis, UNITED STATES
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Traboni S, Vessella G, Bedini E, Iadonisi A. Solvent-free, under air selective synthesis of α-glycosides adopting glycosyl chlorides as donors. Org Biomol Chem 2021; 18:5157-5163. [PMID: 32583825 DOI: 10.1039/d0ob01024c] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
α-Glycosides are highly relevant synthetic targets due to their abundance in natural oligosaccharides involved in many biological processes. Nevertheless their preparation is hampered by several issues, due to both the strictly anhydrous conditions typically required in glycosylation procedures and the non-trivial achievement of high α-stereoselectivity, one of the major challenges in oligosaccharide synthesis. In this paper we report a novel and efficient approach for the highly stereoselective synthesis of α-glycosides. This is based on the unprecedented solvent-free combination of triethylphosphite, tetrabutylammonium bromide and N,N-diisopropylethylamine for the activation of glycosyl chlorides under air. Despite the relative stability of glycosyl chlorides with respect to more reactive halide donors, the solvent-free procedure allowed a wide set of α-glycosides, including biorelevant fragments, to be obtained in much shorter times compared with similar glycosylation approaches in solution. The presented method features a wide target scope and functional group compatibility, also serving with partially disarmed substrates, and it does not require a high stoichiometric excess of reagents nor the preparation of expensive precursors. The solvent-free glycosylation can be even directly performed from 1-hydroxy sugars without purification of the in situ generated chloride, providing an especially useful opportunity in the case of highly reactive and labile glycosyl donors.
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Affiliation(s)
- Serena Traboni
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, I-80126 Naples, Italy.
| | - Giulia Vessella
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, I-80126 Naples, Italy.
| | - Emiliano Bedini
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, I-80126 Naples, Italy.
| | - Alfonso Iadonisi
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, I-80126 Naples, Italy.
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Catalytic, Regioselective Sulfonylation of Carbohydrates with Dibutyltin Oxide under Solvent-Free Conditions. Catalysts 2021. [DOI: 10.3390/catal11020202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A simple approach was developed for the solvent-free regioselective functionalization of carbohydrate polyols with 4-toluesulfonyl (tosyl) group, allowing the easy and quick activation of a saccharide site with a tosylate leaving group. The method is based on the use of catalytic dibutyltin oxide and tetrabuylammonium bromide (TBAB), and a moderate excess of N,N-diisopropylethyl amine (DIPEA) and tosyl chloride (TsCl), leading to the selective functionalization at 75 °C of a secondary equatorial hydroxy function flanked by an axial one in a pyranoside. The procedure is endowed with several advantages, such as the use of cheap reagents, experimental simplicity, and the need for reduced reaction times in comparison with other known approaches.
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Solvent-Free Approaches in Carbohydrate Synthetic Chemistry: Role of Catalysis in Reactivity and Selectivity. Catalysts 2020. [DOI: 10.3390/catal10101142] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Owing to their abundance in biomass and availability at a low cost, carbohydrates are very useful precursors for products of interest in a broad range of scientific applications. For example, they can be either converted into basic chemicals or used as chiral precursors for the synthesis of potentially bioactive molecules, even including nonsaccharide targets; in addition, there is also a broad interest toward the potential of synthetic sugar-containing structures in the field of functional materials. Synthetic elaboration of carbohydrates, in both the selective modification of functional groups and the assembly of oligomeric structures, is not trivial and often entails experimentally demanding approaches practiced by specialized groups. Over the last years, a large number of solvent-free synthetic methods have appeared in the literature, often being endowed with several advantages such as greenness, experimental simplicity, and a larger scope than analogous reactions in solution. Most of these methods are catalytically promoted, and the catalyst often plays a key role in the selectivity associated with the process. This review aims to describe the significant recent contributions in the solvent-free synthetic chemistry of carbohydrates, devoting a special critical focus on both the mechanistic role of the catalysts employed and the differences evidenced so far with corresponding methods in solution.
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Someya H, Seki T, Ishigami G, Itoh T, Saga Y, Yamada Y, Aoki S. One-pot synthesis of cyclic oligosaccharides by the polyglycosylation of monothioglycosides. Carbohydr Res 2020; 487:107888. [DOI: 10.1016/j.carres.2019.107888] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 11/29/2019] [Accepted: 12/03/2019] [Indexed: 10/25/2022]
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Jones B, Behm A, Shadrick M, Geringer SA, Escopy S, Lohman M, De Meo C. Comparative Study on the Effects of Picoloyl Groups in Sialylations Based on Their Substitution Pattern. J Org Chem 2019; 84:15052-15062. [DOI: 10.1021/acs.joc.9b01492] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Bradley Jones
- Department of Chemistry, Southern Illinois University Edwardsville, 1 Hairpin Dr., Edwardsville, Illinois 62025, United States
| | - Alexanndra Behm
- Department of Chemistry, Southern Illinois University Edwardsville, 1 Hairpin Dr., Edwardsville, Illinois 62025, United States
| | - Melanie Shadrick
- Department of Chemistry, Southern Illinois University Edwardsville, 1 Hairpin Dr., Edwardsville, Illinois 62025, United States
| | - Scott A. Geringer
- Department of Chemistry, Southern Illinois University Edwardsville, 1 Hairpin Dr., Edwardsville, Illinois 62025, United States
| | - Samira Escopy
- Department of Chemistry, Southern Illinois University Edwardsville, 1 Hairpin Dr., Edwardsville, Illinois 62025, United States
| | - Matthew Lohman
- Department of Chemistry, Southern Illinois University Edwardsville, 1 Hairpin Dr., Edwardsville, Illinois 62025, United States
| | - Cristina De Meo
- Department of Chemistry, Southern Illinois University Edwardsville, 1 Hairpin Dr., Edwardsville, Illinois 62025, United States
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2013-2014. MASS SPECTROMETRY REVIEWS 2018; 37:353-491. [PMID: 29687922 DOI: 10.1002/mas.21530] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 11/29/2016] [Indexed: 06/08/2023]
Abstract
This review is the eighth update of the original article published in 1999 on the application of Matrix-assisted laser desorption/ionization mass spectrometry (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2014. Topics covered in the first part of the review include general aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, fragmentation, and arrays. The second part of the review is devoted to applications to various structural types such as oligo- and poly- saccharides, glycoproteins, glycolipids, glycosides, and biopharmaceuticals. Much of this material is presented in tabular form. The third part of the review covers medical and industrial applications of the technique, studies of enzyme reactions, and applications to chemical synthesis. © 2018 Wiley Periodicals, Inc. Mass Spec Rev 37:353-491, 2018.
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Affiliation(s)
- David J Harvey
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Roosevelt Drive, Oxford, OX3 7FZ, United Kingdom
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Ilhan M, Ali Z, Khan IA, Küpeli Akkol E. A new isoflavane-4-ol derivative from Melilotus officinalis (L.) Pall. Nat Prod Res 2018; 33:1856-1861. [PMID: 29772948 DOI: 10.1080/14786419.2018.1477152] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A new isoflavane derivative, melilofficinaside together with seven other metabolites including coumarin, uridine, methyl-α-d-fructofuranoside, and flavonoid glucosides were isolated from the aerial parts of Melilotus officinalis (L.) Pall.
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Affiliation(s)
- Mert Ilhan
- a Faculty of Pharmacy, Department of Pharmacognosy , Gazi University , Etiler, Ankara , Turkey.,b National Center for Natural Products Research, School of Pharmacy , University of Mississippi , Oxford , MS , USA.,c Faculty of Pharmacy, Department of Pharmacognosy , Yüzüncü Yıl University , Van , Turkey
| | - Zulfiqar Ali
- b National Center for Natural Products Research, School of Pharmacy , University of Mississippi , Oxford , MS , USA
| | - Ikhlas A Khan
- b National Center for Natural Products Research, School of Pharmacy , University of Mississippi , Oxford , MS , USA
| | - Esra Küpeli Akkol
- a Faculty of Pharmacy, Department of Pharmacognosy , Gazi University , Etiler, Ankara , Turkey
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Ahn J, Chae HS, Chin YW, Kim J. Furylhydroquinones and miscellaneous compounds from the roots of Lithospermum erythrorhizon and their anti-inflammatory effect in HaCaT cells. Nat Prod Res 2018; 33:1691-1698. [PMID: 29382220 DOI: 10.1080/14786419.2018.1431632] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
One new furylhydroquinone derivative (1) and seven known compounds (2-8) were isolated from the roots of Lithospermum erythrorhizon Sieb. et Zucc (Boraginaceae). The structure of 1 was elucidated by extensive spectroscopic methods using NMR and MS. The absolute configuration of shikonofuran J (1) was unambiguously determined by aid of comparison experimental ECD with predicted ECD spectra. All the isolates were tested for their inhibitory activities against IL-6 production in HaCaT cells stimulated by tumor necrosis factor (TNF)-α. It was found that gracicleistanthoside (5) and uridine (7) remarkably down-regulated the TNF-α-induced synthesis of interleukin-6 (IL-6), a pro-inflammatory cytokine associated with cutaneous inflammation, in HaCaT cells.
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Affiliation(s)
- Jongmin Ahn
- a College of Pharmacy and Research Institute of Pharmaceutical Sciences , Seoul National University , Seoul , Republic of Korea
| | - Hee-Sung Chae
- b College of Pharmacy and Integrated Research Institute for Drug Development , Dongguk University-Seoul , Gyeonggi-do , Republic of Korea
| | - Young-Won Chin
- b College of Pharmacy and Integrated Research Institute for Drug Development , Dongguk University-Seoul , Gyeonggi-do , Republic of Korea
| | - Jinwoong Kim
- a College of Pharmacy and Research Institute of Pharmaceutical Sciences , Seoul National University , Seoul , Republic of Korea
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12
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Ahn J, Chae HS, Chin YW, Kim J. Alkaloids from aerial parts of Houttuynia cordata and their anti-inflammatory activity. Bioorg Med Chem Lett 2017; 27:2807-2811. [DOI: 10.1016/j.bmcl.2017.04.072] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 04/19/2017] [Accepted: 04/24/2017] [Indexed: 11/25/2022]
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Hsu MY, Liu YP, Lam S, Lin SC, Wang CC. TMSBr-mediated solvent- and work-up-free synthesis of α-2-deoxyglycosides from glycals. Beilstein J Org Chem 2016; 12:1758-64. [PMID: 27559420 PMCID: PMC4979735 DOI: 10.3762/bjoc.12.164] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 07/09/2016] [Indexed: 12/11/2022] Open
Abstract
The thio-additions of glycals were efficiently promoted by a stoichiometric amount of trimethylsilyl bromide (TMSBr) to produce S-2-deoxyglycosides under solvent-free conditions in good to excellent yields. In addition, with triphenylphosphine oxide as an additive, the TMSBr-mediated direct glycosylations of glycals with a large range of alcohols were highly α-selective.
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Affiliation(s)
- Mei-Yuan Hsu
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan; Chemical Biology and Molecular Biophysics Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan; Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Yi-Pei Liu
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan; Department of Chemistry, National Central University, Jhongli 320, Taiwan
| | - Sarah Lam
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Su-Ching Lin
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Cheng-Chung Wang
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan; Chemical Biology and Molecular Biophysics Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan
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Affiliation(s)
- Yonglian Zhang
- Department of Chemistry & Chemical Biology, Rutgers The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Spencer Knapp
- Department of Chemistry & Chemical Biology, Rutgers The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
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Cravotto G, Caporaso M, Jicsinszky L, Martina K. Enabling technologies and green processes in cyclodextrin chemistry. Beilstein J Org Chem 2016; 12:278-94. [PMID: 26977187 PMCID: PMC4778522 DOI: 10.3762/bjoc.12.30] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 01/29/2016] [Indexed: 01/05/2023] Open
Abstract
The design of efficient synthetic green strategies for the selective modification of cyclodextrins (CDs) is still a challenging task. Outstanding results have been achieved in recent years by means of so-called enabling technologies, such as microwaves, ultrasound and ball mills, that have become irreplaceable tools in the synthesis of CD derivatives. Several examples of sonochemical selective modification of native α-, β- and γ-CDs have been reported including heterogeneous phase Pd- and Cu-catalysed hydrogenations and couplings. Microwave irradiation has emerged as the technique of choice for the production of highly substituted CD derivatives, CD grafted materials and polymers. Mechanochemical methods have successfully furnished greener, solvent-free syntheses and efficient complexation, while flow microreactors may well improve the repeatability and optimization of critical synthetic protocols.
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Affiliation(s)
- Giancarlo Cravotto
- Dipartimento di Scienza e Tecnologia del Farmaco and NIS - Centre for Nanostructured Interfaces and Surfaces, University of Turin, Via P. Giuria 9, 10125 Turin, Italy
| | - Marina Caporaso
- Dipartimento di Scienza e Tecnologia del Farmaco and NIS - Centre for Nanostructured Interfaces and Surfaces, University of Turin, Via P. Giuria 9, 10125 Turin, Italy
| | - Laszlo Jicsinszky
- Dipartimento di Scienza e Tecnologia del Farmaco and NIS - Centre for Nanostructured Interfaces and Surfaces, University of Turin, Via P. Giuria 9, 10125 Turin, Italy
| | - Katia Martina
- Dipartimento di Scienza e Tecnologia del Farmaco and NIS - Centre for Nanostructured Interfaces and Surfaces, University of Turin, Via P. Giuria 9, 10125 Turin, Italy
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16
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Kicsák M, Bege M, Bereczki I, Csávás M, Herczeg M, Kupihár Z, Kovács L, Borbás A, Herczegh P. A three-component reagent system for rapid and mild removal of O-, N- and S-trityl protecting groups. Org Biomol Chem 2016; 14:3190-2. [DOI: 10.1039/c6ob00067c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A synergistic effect of BF3·Et2O, hexafluoroisopropanol and triethylsilane led to efficient detritylation of nucleoside, monosaccharide and amino acid derivatives.
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Affiliation(s)
- Máté Kicsák
- Department of Pharmaceutical Chemistry
- University of Debrecen
- H-4032 Debrecen
- Hungary
| | - Miklós Bege
- Department of Pharmaceutical Chemistry
- University of Debrecen
- H-4032 Debrecen
- Hungary
| | - Ilona Bereczki
- Department of Pharmaceutical Chemistry
- University of Debrecen
- H-4032 Debrecen
- Hungary
| | - Magdolna Csávás
- Department of Pharmaceutical Chemistry
- University of Debrecen
- H-4032 Debrecen
- Hungary
| | - Mihály Herczeg
- Department of Pharmaceutical Chemistry
- University of Debrecen
- H-4032 Debrecen
- Hungary
| | - Zoltán Kupihár
- Department of Medicinal Chemistry
- University of Szeged
- H-6720 Szeged
- Hungary
| | - Lajos Kovács
- Department of Medicinal Chemistry
- University of Szeged
- H-6720 Szeged
- Hungary
| | - Anikó Borbás
- Department of Pharmaceutical Chemistry
- University of Debrecen
- H-4032 Debrecen
- Hungary
| | - Pál Herczegh
- Department of Pharmaceutical Chemistry
- University of Debrecen
- H-4032 Debrecen
- Hungary
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18
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Berthet M, Davanier F, Dujardin G, Martinez J, Parrot I. MgI2-Mediated Chemoselective Cleavage of Protecting Groups: An Alternative to Conventional Deprotection Methodologies. Chemistry 2015; 21:11014-6. [DOI: 10.1002/chem.201501799] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Indexed: 01/08/2023]
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Farrán A, Cai C, Sandoval M, Xu Y, Liu J, Hernáiz MJ, Linhardt RJ. Green solvents in carbohydrate chemistry: from raw materials to fine chemicals. Chem Rev 2015; 115:6811-53. [PMID: 26121409 DOI: 10.1021/cr500719h] [Citation(s) in RCA: 155] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Angeles Farrán
- †Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Paseo Senda del Rey 4, 28040 Madrid, Spain
| | - Chao Cai
- ‡Key Laboratory of Marine Drugs of Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Manuel Sandoval
- §Escuela de Química, Universidad Nacional of Costa Rica, Post Office Box 86, 3000 Heredia, Costa Rica
| | - Yongmei Xu
- ∥Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Jian Liu
- ∥Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - María J Hernáiz
- ▽Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense de Madrid, Pz/Ramón y Cajal s/n, 28040 Madrid, Spain
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Menuel S, Doumert B, Saitzek S, Ponchel A, Delevoye L, Monflier E, Hapiot F. Selective Secondary Face Modification of Cyclodextrins by Mechanosynthesis. J Org Chem 2015; 80:6259-66. [PMID: 26000615 DOI: 10.1021/acs.joc.5b00697] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
α-, β-, and γ-cyclodextrins (CDs) were modified on their secondary face by mechanosynthesis at room temperature using a laboratory-scale ball-mill. Mono-2-tosylated α-, β-, and γ-CDs were obtained in good yield from mixtures of native α-, β-, and γ-CDs, respectively, N-tosylimidazole, and an inorganic base, with each of them being in the solid state. The yields appeared to be dependent upon the nature of the base and the reaction time. A kinetic monitoring by (1)H NMR spectroscopy demonstrated that the highest yields in mono-2-tosyl-CDs were measured using KOH as a base in very short reaction times (up to 65% in 80 s). Mono-(2,3-manno-epoxide) α-, β-, and γ-CDs were subsequently synthesized by ball-milling a mixture of monotosylated α-, β-, and γ-CDs, respectively, and KOH. The characterization of the modified CDs was carried out by X-ray diffraction, mass spectrometry, solid-state NMR, and diffuse reflectance UV-vis (DR UV-vis) spectroscopies. Clues to the supramolecular arrangement of the molecules in the solid state provide information on the reaction mechanism.
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Affiliation(s)
- Stéphane Menuel
- †Unité de Catalyse et de Chimie du Solide - UCCS, CNRS UMR 8181, Université d'Artois, Faculté des Sciences Jean Perrin, SP18, 62307 Lens Cedex, France
| | - Bertrand Doumert
- ‡Fédération M.E. Chevreul, CNRS FR2638, Université de Lille, Cité Scientifique, Bâtiment C4 - BP 90108, 59652 Villeneuve d'Ascq Cedex, France
| | - Sébastien Saitzek
- †Unité de Catalyse et de Chimie du Solide - UCCS, CNRS UMR 8181, Université d'Artois, Faculté des Sciences Jean Perrin, SP18, 62307 Lens Cedex, France
| | - Anne Ponchel
- †Unité de Catalyse et de Chimie du Solide - UCCS, CNRS UMR 8181, Université d'Artois, Faculté des Sciences Jean Perrin, SP18, 62307 Lens Cedex, France
| | - Laurent Delevoye
- §Unité de Catalyse et de Chimie du Solide - UCCS, CNRS UMR 8181, Ecole Nationale Supérieure de Chimie de Lille, Université de Lille, Cité Scientifique, Bâtiment C7 - BP 90108, 59652 Villeneuve d'Ascq Cedex, France
| | - Eric Monflier
- †Unité de Catalyse et de Chimie du Solide - UCCS, CNRS UMR 8181, Université d'Artois, Faculté des Sciences Jean Perrin, SP18, 62307 Lens Cedex, France
| | - Frédéric Hapiot
- †Unité de Catalyse et de Chimie du Solide - UCCS, CNRS UMR 8181, Université d'Artois, Faculté des Sciences Jean Perrin, SP18, 62307 Lens Cedex, France
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