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Zýka J, Prouza V, Habanová N, Pohl R, Parkan K. The synthesis and characterization of electron-poor glycosylamines and derived glycosylamides. Carbohydr Res 2024; 536:109023. [PMID: 38242070 DOI: 10.1016/j.carres.2024.109023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/26/2023] [Accepted: 01/04/2024] [Indexed: 01/21/2024]
Abstract
This paper describes a unified approach toward diglycosylamines using methanolic ammonia. All the glycosylamines prepared have been fully characterized, and their anomeric configuration has been determined. The article presents a novel method for the N-acylation of diglycosylamines and other electron-poor glycosylamines, which employs nitromethane as a solvent in carboxylic anhydride acylation under acidic conditions. The feasibility of this transformation is represented by a wide range of reaction substrates. All glycosylamides are formed solely with β-configuration. These two reactions constitute a simple and effective route to the synthesis of a novel class of compounds with an N-glycosidic linkage.
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Affiliation(s)
- Jakub Zýka
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic
| | - Vít Prouza
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic
| | - Nina Habanová
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic
| | - Kamil Parkan
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic.
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Norberg T, Kallin E, Blixt O. Reversible derivatization of sugars with carbobenzyloxy groups and use of the derivatives in solution-phase enzymatic oligosaccharide synthesis. Carbohydr Res 2021; 502:108272. [PMID: 33711724 DOI: 10.1016/j.carres.2021.108272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/15/2021] [Accepted: 02/18/2021] [Indexed: 11/25/2022]
Abstract
Simple protocols for attaching and detaching carbobenzyloxy (Cbz) groups at the reducing end of sugars was developed. Briefly, lactose was converted into its glycosylamine, which was then acylated with carbobenzyloxy chloride in high overall yield. The obtained lactose Cbz derivative was used in sequential glycosylations using glycosyltransferases and nucleotide sugars in aqueous buffers. Isolation of the reaction products after each step was by simple C-18 solid-phase extraction. The Cbz group was removed by catalytic hydrogenolysis or catalytic transfer hydrogenation followed by in situ glycosylamine hydrolysis. In this way, a trisaccharide (GlcNAc-lactose), a human milk tetrasaccharide (LNnT), and a human milk pentasaccharide (LNFPIII) were prepared in a simple and efficient way.
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Affiliation(s)
- Thomas Norberg
- Department of Chemistry (BMC), Uppsala University, PO Box 576, SE-751 23, Uppsala, Sweden.
| | | | - Ola Blixt
- Technical University of Denmark, Department of Biotechnology and Biomedicine, Søltofts Plads, Bygning 225, DK-2800, Kgs. Lyngby, Denmark.
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Abstract
This chapter reports an overview of the recent advances in the analysis of mono- and oligosaccharides by capillary electrophoresis (CE); furthermore, relevant reviews and research articles recently published in the field are tabulated. Additionally, pretreatments and procedures applied to uncharged and acidic carbohydrates (i.e., monosaccharides and lower oligosaccharides carrying carboxylate, sulfate, or phosphate groups) are described.Representative examples of such procedures are reported in detail, upon describing robust methodologies for the study of (1) neutral oligosaccharides derivatized by reductive amination and by formation of glycosylamines; (2) sialic acid derivatized with 2-aminoacridone, released from human serum immunoglobulin G; (3) anomeric couples of neutral glycosides separated using borate-based buffers; (4) unsaturated, underivatized oligosaccharides from lyase-treated alginate.
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Affiliation(s)
- Mila Toppazzini
- GSK Vaccines, Manufacturing Science & Technology Bellaria di Rosia, Sovicille (Siena), Italy
| | - Anna Coslovi
- GSK Vaccines, Manufacturing Science & Technology Bellaria di Rosia, Sovicille (Siena), Italy
| | - Marco Rossi
- Bracco Imaging SpA-CRB Trieste, AREA Science Park, Trieste, Italy
| | - Anna Flamigni
- Bracco Imaging SpA-CRB Trieste, AREA Science Park, Trieste, Italy
| | - Edi Baiutti
- Bracco Imaging SpA-CRB Trieste, AREA Science Park, Trieste, Italy
| | - Cristiana Campa
- GSK Vaccines, Manufacturing Science & Technology Bellaria di Rosia, Sovicille (Siena), Italy.
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Duskova K, Sierra S, Arias-Pérez MS, Gude L. Human telomeric G-quadruplex DNA interactions of N-phenanthroline glycosylamine copper(II) complexes. Bioorg Med Chem 2015; 24:33-41. [PMID: 26678174 DOI: 10.1016/j.bmc.2015.11.037] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/24/2015] [Accepted: 11/26/2015] [Indexed: 01/12/2023]
Abstract
We report in this article the interactions of five N-(1,10-phenanthrolin-5-yl)-β-glycopyranosylamine copper(II) complexes with G-quadruplex DNA. Specifically, the interactions of these compounds with a human telomeric oligonucleotide have been assessed by fluorescence-based assays (FRET melting and G4-FID), circular dichroism and competitive equilibrium dialysis experiments. The metal complexes bind and stabilize G-quadruplex DNA structures with apparent association constants in the order of 10(4)-10(5)M(-1) and the affinity observed is dependent on the ionic conditions utilized and the specific nature of the carbohydrate moiety tethered to the 1,10-phenanthroline system. The compounds showed only a slight preference to bind G-quadruplex DNA over duplex DNA when the quadruplex DNA was folded in sodium ionic conditions. However, the binding affinity and selectivity, although modest, were notably increased when the G-quadruplex DNA was folded in the presence of potassium metal ions. Moreover, the study points towards a significant contribution of groove and/or loop binding in the recognition mode of quadruplex structures by these non-classical quadruplex ligands. The results reported herein highlight the potential and the versatility of carbohydrate bis-phenanthroline metal-complex conjugates to recognize G-quadruplex DNA structures.
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Affiliation(s)
- Katerina Duskova
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá, 28805 Alcalá de Henares (Madrid), Spain
| | - Sara Sierra
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá, 28805 Alcalá de Henares (Madrid), Spain
| | - María-Selma Arias-Pérez
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá, 28805 Alcalá de Henares (Madrid), Spain
| | - Lourdes Gude
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá, 28805 Alcalá de Henares (Madrid), Spain.
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