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Choutka J, Kratochvíl M, Zýka J, Pohl R, Parkan K. Straightforward synthesis of protected 2-hydroxyglycals by chlorination-dehydrochlorination of carbohydrate hemiacetals. Carbohydr Res 2020; 496:108086. [PMID: 32828008 DOI: 10.1016/j.carres.2020.108086] [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: 04/09/2020] [Revised: 06/18/2020] [Accepted: 06/18/2020] [Indexed: 10/23/2022]
Abstract
A straightforward and scalable method for the synthesis of protected 2-hydroxyglycals is described. The approach is based on the chlorination of carbohydrate-derived hemiacetals, followed by an elimination reaction to establish the glycal moiety. 1,2-dehydrochlorination reactions were studied on a range of glycosyl chlorides to provide suitable reaction conditions for this transformation. Benzyl ether, isopropylidene and benzylidene protecting groups, as well as interglycosidic linkage, were found to be compatible with this protocol. The described method is operationally simple and allows for the quick preparation of 2-hydroxyglycals with other than ester protecting groups, providing a feasible alternative to existing methods.
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Affiliation(s)
- Jan Choutka
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic
| | - Michal Kratochvíl
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic
| | - Jakub Zýka
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences & IOCB Research Centre, 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.
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2
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Integrating thin film microfluidics in developing a concise synthesis of DGJNAc: A potent inhibitor of α-N-acetylgalctosaminidases. Bioorg Med Chem Lett 2018; 28:3748-3751. [PMID: 30366618 DOI: 10.1016/j.bmcl.2018.10.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 10/08/2018] [Accepted: 10/10/2018] [Indexed: 11/23/2022]
Abstract
A simple synthesis, which utilizes a thin film microfluidic reactor for a problematic step, of a potent inhibitor of α-N-acetylhexosaminidases, DGJNAc, has been developed.
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Kakitsubata Y, Aramaki R, Nishioka K, Wakao M, Suda Y. Toward the construction of dermatan sulfate (DS) partial disaccharide library: efficient synthesis of building blocks, common intermediate, and ligand conjugate of type-B DS disaccharide. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.01.105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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4
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Christensen HM, Oscarson S, Jensen HH. Common side reactions of the glycosyl donor in chemical glycosylation. Carbohydr Res 2015; 408:51-95. [DOI: 10.1016/j.carres.2015.02.007] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 02/12/2015] [Accepted: 02/18/2015] [Indexed: 12/13/2022]
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5
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Kandasamy J, Schuhmacher F, Hahm HS, Klein JC, Seeberger PH. Modular automated solid phase synthesis of dermatan sulfate oligosaccharides. Chem Commun (Camb) 2014; 50:1875-7. [PMID: 24402061 DOI: 10.1039/c3cc48860h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dermatan sulfates are glycosaminoglycan polysaccharides that serve a multitude of biological roles as part of the extracellular matrix. Orthogonally protected D-galactosamine and L-iduronic acid building blocks and a photo-cleavable linker are instrumental for the automated synthesis of dermatan sulfate oligosaccharides. Conjugation-ready oligosaccharides were obtained in good yield.
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Affiliation(s)
- Jeyakumar Kandasamy
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany.
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6
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Takahashi H, Shida T, Hitomi Y, Iwai Y, Miyama N, Nishiyama K, Sawada D, Ikegami S. Divergent Synthesis ofL-Sugars andL-Iminosugars fromD-Sugars. Chemistry 2006; 12:5868-77. [PMID: 16718730 DOI: 10.1002/chem.200600268] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An efficient divergent synthesis of L-sugars and L-iminosugars from D-sugars is described. The important intermediate, delta-hydroxyalkoxamate, prepared from D-glucono-/galactono-1,5-lactone, was cyclized under Mitsunobu conditions to give the O-cyclized oxime compound and the N-cyclized lactam compound as mixtures. A more detailed investigation revealed that the appropriate protecting groups and solvents controlled the specificity for the O-/N-cyclization of the delta-hydroxyalkoxamate. Suitable protection at the 6-position of delta-hydroxyalkoxamate, derived from D-glucono-1,5-lactone, afforded the corresponding O-alkylation product alone. Thus we succeeded in applying this to the total synthesis of L-iduronic acid. In contrast, with both TBDMS as the protecting group and RCN as the solvent the efficient conversion of D-glucono/galactono-1,5-lactone into the corresponding L-iminosugars (L-idonolactam and L-altronolactam) was achieved.
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Affiliation(s)
- Hideyo Takahashi
- School of Pharmaceutical Sciences, Teikyo University, Sagamiko, Sagamihara, Kanagawa, 199-0195, Japan
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8
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Cao H, Yu B. Synthesis of a S-linked heparan sulfate trisaccharide as the substrate mimic of heparanase. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.04.088] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Vidal S, Garcia M, Montero JL, Morère A. Synthesis and biological evaluation of new mannose 6-phosphate analogues. Bioorg Med Chem 2002; 10:4051-6. [PMID: 12413858 DOI: 10.1016/s0968-0896(02)00264-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Three new analogues of mannose 6-phosphate (M6P)--a sulphate and two carboxylates--have been synthesized and their affinity toward the M6P/IGFII receptor evaluated by affinity column chromatography. These compounds display strong binding to the receptor and therefore are new M6P analogues which may find some dermatological applications, for example healing of post-surgical scars.
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Affiliation(s)
- Sébastien Vidal
- Laboratoire de Chimie Biomoléculaire (UMR 5032), Université Montpellier II, Ecole Nationale Supérieure de Chimie de Montpellier, France
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10
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Barroca N, Jacquinet JC. An access to various sulfation patterns in dermatan sulfate: chemical syntheses of sulfoforms of trisaccharide methyl glycosides. Carbohydr Res 2002; 337:673-89. [PMID: 11950464 DOI: 10.1016/s0008-6215(02)00060-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The syntheses are reported for the first time of alpha-L-IdopA2SO(3)-(1-->3)-beta-D-GalpNAc4SO(3)-(1-->4)-alpha-L-IdopA2SO(3)-(1-->OMe), its disulfated analogue alpha-L-IdopA2SO(3)-(1-->3)-beta-D-GalpNAc-(1-->4)-alpha-L-IdopA2SO(3)-(1-->OMe), and of beta-D-GalpNAc4SO(3)-(1-->4)-alpha-L-IdopA2SO(3)-(1-->3)-beta-D-GalpNAc4SO(3)-(1-->OMe), which represent structural fragments of dermatan sulfate, unavailable directly by chemical or enzymatic degradation of the glycosaminoglycan polymer. These molecules were readily obtained from a pair of key disaccharide intermediates, in which the relative difference of stability of the D-GalNAc 4-hydroxy protecting groups (acetate or pivalate) toward saponification conditions allowed access to various sulfoforms from a common precursor. For the preparation of these blocks, the 4-O-pivaloyl-D-galacto moiety was readily obtained through a one-pot stereospecific intramolecular nucleophilic displacement on an easily available 3-O-pivaloyl-D-gluco precursor, and the L-IdoA moiety through selective radical oxidation at C-6 of a L-ido 4,6-diol derivative with oxoammonium salts.
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Affiliation(s)
- Nadine Barroca
- Institut de Chimie Organique et Analytique, UFR Faculté des Sciences, UMR CNRS 6005, Université d'Orléans, BP 6759, F-45067 Orléans, France
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Barroca N, Jacquinet JC. Syntheses of beta-D-GalpNAc4SO3-(1-->4)-L-IdopA2SO3, a disaccharide fragment of dermatan sulfate, and of its methyl alpha-L-glycoside derivative. Carbohydr Res 2000; 329:667-79. [PMID: 11128594 DOI: 10.1016/s0008-6215(00)00234-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The syntheses of sodium (sodium 2-acetamido-2-deoxy-4-O-sulfonato-beta-D-galactopyranosyl)-(1-->4)-(sodium 2-O-sulfonato-L-idopyran)uronate, a disaccharide fragment of dermatan sulfate, and of its methyl alpha-L-glycoside derivative are reported for the first time. The use of 4-O-acetyl-3,6-di-O-benzyl-2-deoxy-2-trichloroacetamido-1-O-trichloroacetimidoyl-alpha-D-galactopyranose, readily prepared from a D-gluco precursor, allowed the stereocontrolled and high yielding coupling with the low reactive 4-hydroxyl group of L-iduronic acid ester derivatives. Classical transformation of the disaccharide products into the target molecules was achieved in high yield.
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Affiliation(s)
- N Barroca
- Institut de Chimie Organique et Analytique, UPRES-A CNRS 6005, UFR Faculté des Sciences, Université d'Orléans, France
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13
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Moule CJ, Clements PR, Hopwood JJ, Crisp GT. Affinity Labelling at the 4-Hydroxyl Group of N-Acetylglucosamine and N-Acetylgalactosamine. SYNTHETIC COMMUN 2000. [DOI: 10.1080/00397910008087177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Lubineau A, Bonnaffé D. Access to Molecular Diversity in Glycosaminoglycans: Combinatorial Synthesis of Eight Chondroitin Sulfate Disaccharides. European J Org Chem 1999. [DOI: 10.1002/(sici)1099-0690(199910)1999:10<2523::aid-ejoc2523>3.0.co;2-q] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Grindley TB. Applications of tin-containing intermediates to carbohydrate chemistry. Adv Carbohydr Chem Biochem 1998; 53:17-142. [PMID: 9710969 DOI: 10.1016/s0065-2318(08)60043-8] [Citation(s) in RCA: 141] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- T B Grindley
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada
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16
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Rochepeau-Jobron L, Jacquinet JC. Synthesis of O-(2-O-sulfo-α-l-idopyranosyluronic acid)-(1 → 3)-2-acetamido-2-deoxy-4-O-sulfo-d-galactopyranose trisodium salt, a disaccharide fragment of dermatan sulfate. Carbohydr Res 1997. [DOI: 10.1016/s0008-6215(97)10017-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Synthesis and anti-thrombin activity of a hexasaccharide corresponding to the binding site of dermatan sulfate to heparin cofactor II. Bioorg Med Chem Lett 1997. [DOI: 10.1016/s0960-894x(97)10082-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Tabeur C, Machetto F, Mallet JM, Duchaussoy P, Petitou M, Sinaÿ P. L-iduronic acid derivatives as glycosyl donors. Carbohydr Res 1996; 281:253-76. [PMID: 8721148 DOI: 10.1016/0008-6215(95)00346-0] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
O-[Methyl (2-O-acetyl-3-O-benzyl-4-O-levulinyl-alpha, and beta-L-idopyranosid)uronate] trichloroacetimidate and the corresponding n-pentenyl glycosides are efficient L-iduronic acid glycosyl donors. Both have been used for the high-yielding synthesis of basic disaccharide blocks which are useful for the subsequent synthesis of complex oligosaccharides related to heparin/heparan sulfate, and dermatan sulfate. In contrast, the corresponding thioethyl glycosides, thiophenyl glycosides, and fluoride, did not yield the expected disaccharides.
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Affiliation(s)
- C Tabeur
- Département de Chimie, URA CNRS 1686, Paris, France
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19
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Jain RK, Liu XG, Matta KL. Synthesis of isomeric sulfated disaccharides. Methyl O-(2-acetamido-2-deoxy-3-O-, 4-O-, and 6-O-sulfo-beta-D-glucopyranosyl sodium salt)-(1-->3)-beta-D-galactopyranoside. Carbohydr Res 1995; 268:279-85. [PMID: 7736472 DOI: 10.1016/0008-6215(94)00323-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- R K Jain
- Roswell Park Cancer Institute, Department of Gynecologic Oncology, Buffalo, NY 14263
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20
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Rio-Anneheim S, Paulsen H, Meldal M, Bock K. Synthesis of the building blocks Nα-Fmoc-O-[α-D-Ac3GalN3p-(1→3)-α-D-Ac2GalN3p]-Thr-OPfp and Nα-Fmoc-O-[α-D-Ac3GalN3p-(1→6)-α-D-Ac2GalN3p]-Thr-OPfp and their application in the solid phase glycopeptide synthesis of core 5 and core 7 mucin O-glycopeptides. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/p19950001071] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Goto F, Ogawa T. Synthesis of a dermatan sulfate hexasaccharide that activates heparin cofactor II. Bioorg Med Chem Lett 1994. [DOI: 10.1016/s0960-894x(01)80166-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Kinzy WR, Belenky DM, Loontiens FG, Sharon N. Synthesis of methyl alpha- and beta-N-dansyl-D-galactosaminides, probes for the combining sites of N-acetyl-D-galactosamine-specific lectins. Glycoconj J 1992; 9:225-7. [PMID: 1490101 DOI: 10.1007/bf00731133] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The synthesis of the methyl alpha- and beta-N-dansyl-D-galactosaminides is described using methyl alpha,beta-2-azido-2-deoxy-D-galactopyranoside as starting material. This was reduced to the corresponding methyl alpha,beta-2-amino-2-deoxy-D-galactopyranoside and then treated with dansyl chloride to yield a mixture of methyl alpha,beta-N-dansyl-D-galactosaminides which was separated into individual anomeric forms by flash chromatography on silica gel. Methyl alpha-N-dansyl-D-galactosaminide was used as a fluorescent indicator ligand in continuous substitution titrations to determine the association constants of nonchromophoric carbohydrates with the N-acetyl-D-galactosamine specific lectin from Erythrina corallodendron.
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Affiliation(s)
- W R Kinzy
- Department of Membrane Research and Biophysics, Weizmann Institute of Science, Rehovot, Israel
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23
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Gauffeny F, Marra A, Shi Shun LK, Sinaÿ P, Tabeur C. A novel and convenient method for the removal of a nitrate group at the anomeric position. Carbohydr Res 1991. [DOI: 10.1016/0008-6215(91)89056-l] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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24
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Zsiska M, Meyer B. Syntheses of disaccharides with (1----4)-beta glycosidic linkages related to the 4- and 6-sulfates and the 4,6-disulfates of chondroitin. Carbohydr Res 1991; 215:261-77. [PMID: 1794125 DOI: 10.1016/0008-6215(91)84026-b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The solution salts of the 6'-sulfate 12, the 4'-sulfate 15 and the 4',6'-disulfate 17 of benzyl 4-O-(beta-D-galactopyranosyl)-beta-D-glucopyranosiduronate 10 have been synthesized. Methyl [benzyl 2,3-di-O-benzoyl-4-O-(2,3-di-O-benzoyl-beta-D-galactopyranosyl)-beta-D-+ ++glucopyranosid]uronate (9) has been prepared as a key intermediate from benzyl 4',6'-O-benzylidene-beta-D-lactopyranoside (2). Protection of 2 at C-6 with the tert-butyldimethylsilyl group, followed by O-perbenzoylation and disilylation, gave benzyl 2,3-di-O-benzoyl-4-O-(2,3-di-O-benzoyl-4,6-O-benzylidene-beta-D-galac top yranosyl)-beta-D-glucopyranoside (7). Oxidation of the 6-position of 7 proved to be difficult. However, 7 could be converted into the tert-butyl glucuronate 8 using chromium trioxide-pyridine and tert-butanol. Simultaneous hydrolysis of the benzylidene acetal and the tert-butyl ester groups, followed by esterification of the resulting free acid with diazomethane, yielded 9. Compound was directly sulfated with sulfur trioxide-trimethylamine within 12 h to give the 6'-sulfate 11. The 4',6-disulfate 16 was accessible by running the reaction under the same conditions for 14 days. The 4'-sulfate 14 was obtained after protecting the 6'-OH group of 9 with benzoyl cyanide to give the 6'-benzoate 13 followed by sulfation under more vigorous reaction conditions. Deesterification of 9, 11, 14, and 16 was achieved by treatment with aqueous sodium hydroxide in tetrahydrofuran to give 10, 12, 15, and 17, respectively.
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Affiliation(s)
- M Zsiska
- Department of Chemistry, University of Oldenburg, F.R.G
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25
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Zsiska M, Meyer B. Synthesis of beta-D-GlcA-(1----3)-beta-D-Gal disaccharides with 4- and 6-sulfate groups and 4,6-disulfate groups. Carbohydr Res 1991; 215:279-92. [PMID: 1794126 DOI: 10.1016/0008-6215(91)84027-c] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The sodium salts of the 6-sulfate 7, the 4-sulfate 10, and the 4,6-disulfate 12 of benzyl 3-O-(beta-D-glucopyranosyl uronate)-beta-D-galactopyranoside (5) have been synthesized. Methyl (2,3,4-tri-O-acetyl-1-bromo-1-deoxy-alpha-d-glucopyran)uronate (1) was coupled with benzyl 2-O-benzoyl-4,6-O-benzylidene-beta-D-galactopyranoside (2) to yield 3. The benzylidene acetal of 3 was hydrolyzed to give benzyl 2-O-benzoyl-3-O-[methyl (2,3,4-tri-O-acetyl-beta-D-glucopyranosyl)uronate]-beta-D-galactopyra noside (4). Compound 4 was utilized as a key intermediate to prepare the sulfated disaccharides 7,10, and 12. Direct sulfation of 4 with sulfur trioxide-trimethylamine for 2 days yielded the 6-sulfate 6. The 4,6-disulfate 11 was accessible by running the reaction under the same conditions for 14 days. The 4-sulfate 9 was obtained after protecting the 6-OH group of 4 by reaction with benzoyl imidazole to give the 6-benzoate 8, followed by sulfation under vigorous conditions. Treatment of the protected compounds 4, 6, 9, and 11 with aqueous sodium hydroxide in tetrahydrofuran gave the unprotected 5, 7, 10, and 12, respectively.
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Affiliation(s)
- M Zsiska
- Complex Carbohydrate Research Center, University of Georgia, Athens 30602
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26
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A novel class of glycosyl donors: Anomeric S-xanthates of 2-azido-2-deoxy-D-galactopyranosyl derivatives. Tetrahedron 1991. [DOI: 10.1016/s0040-4020(01)87127-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Jain RK, Matta KL. Synthesis of the sodium salts of methyl 2-O-alpha-L-fucopyranosyl-alpha-L-fucopyranoside 3- and 4-sulfate. Carbohydr Res 1990; 208:51-8. [PMID: 1964872 DOI: 10.1016/0008-6215(90)80084-g] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Synthesis of methyl 2-O-alpha-L-fucopyranosyl-alpha-L-fucopyranoside 3- and 4-sulfate was accomplished through the use of a key glycosyl donor, methyl 2,3,4-tri-O-benzyl-1-thio-beta-L-fucopyranoside, with methyl 2,3-O-isopropylidene-alpha-L-fucopyranoside and methyl 4-O-acetyl-3-O-benzyl-alpha-fucopyranoside as acceptors.
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Affiliation(s)
- R K Jain
- Department of Gynecologic Oncology, Roswell Park Memorial Institute, New York State Department of Health, Buffalo 14263
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Kogelberg H, Meyer B. Sulfation of O-isopropylidenated lactose derivatives at the 2′-position induces an unusual 3,0B-boat conformation of the d-galactosyl residue. Carbohydr Res 1990. [DOI: 10.1016/0008-6215(90)84234-l] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Jacquinet JC. Syntheses of the methyl glycosides of the repeating units of chondroitin 4- and 6-sulfate. Carbohydr Res 1990; 199:153-81. [PMID: 2114948 DOI: 10.1016/0008-6215(90)84259-w] [Citation(s) in RCA: 64] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
3,4,6-Tri-O-acetyl-D-galactal was transformed into methyl 6-O-acetyl-2-azido-4-O-benzyl-2-deoxy-beta-D-galactopyranoside and its 4-O-acetyl-6-O-benzyl analogue, each of which was glycosylated with activated, O-acetylated derivatives of methyl D-glucopyranosyluronate. The resulting beta-(1----3)-linked disaccharide derivatives were each reductively N-acetylated, hydrogenolysed, O-sulfated, and saponified to afford the disodium salts of methyl 2-acetamido-2-deoxy-3-O-(beta-D-glucopyranosyluronic acid)-4-O-sulfo-beta-D-galactopyranoside and the 6-O-sulfo analogue. D-Galactal was also transformed into activated derivatives of 2-azido-3,6-di-O-benzyl-2-deoxy-D-galactopyranose and their 3,4-di-O-benzyl analogues with various substituents at O-4 and O-6. These glycosyl donors were condensed with 6-O-protected derivatives of methyl 2,3-di-O-benzyl-beta-D-glucopyranoside to give the beta-(1----4)-linked disaccharide derivatives, which were selectively deprotected, then oxidised at C-6 of the gluco unit, reductively N-acetylated, selectively deprotected, O-sulfated at C-4 or C-6 of the galacto unit, and hydrogenolysed to give the disodium salts of methyl 4-O-(2-acetamido-2-deoxy-4-O-sulfo-beta-D-galactopyranosyl)-beta-D- glucopyranosiduronic acid and the 6-O-sulfo analogue.
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Affiliation(s)
- J C Jacquinet
- Laboratoire de Biochimie Structurale, U.R.A. 499, U.F.R. Faculté des Sciences, Université d'Orléans, France
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Okuda S, Kondo T, Murata S. Synthesis of methyl 2-O- and 3-O-sulfo-d-glucopyranosiduronic acids. Carbohydr Res 1990. [DOI: 10.1016/0008-6215(90)84283-z] [Citation(s) in RCA: 11] [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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31
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Ferro DR, Provasoli A, Ragazzi M, Casu B, Torri G, Bossennec V, Perly B, Sinaÿ P, Petitou M, Choay J. Conformer populations of L-iduronic acid residues in glycosaminoglycan sequences. Carbohydr Res 1990; 195:157-67. [PMID: 2331699 DOI: 10.1016/0008-6215(90)84164-p] [Citation(s) in RCA: 195] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The 1H-n.m.r. 3J values for the L-iduronic acid (IdoA) residues for solutions in D2O of natural and synthetic oligosaccharides that represent the biologically important sequences of dermatan sulfate, heparan sulfate, and heparin have been rationalized by force-field calculations. The relative proportions of the low-energy conformers 1C4, 2S0, and 4C1 vary widely as a function of sequence and of pattern of sulfation. When IdoA or IdoA-2-sulfate units are present inside saccharide sequences, only 1C4 and 2S0 conformations contribute significantly to the equilibrium. This equilibrium is displaced towards the 2S0 form when IdoA-2-sulfate is preceded by a 3-O-sulfated amino sugar residue, and towards the 1C4 form when it is a non-reducing terminal. For terminal non-sulfated IdoA, the 4C1 form also contributes to the equilibrium. N.O.e. data confirm these conclusions. Possible biological implications of the conformational flexibility and the counter-ion induced changes in conformer populations are discussed.
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Affiliation(s)
- D R Ferro
- Istituto di Chimica delle Macromolecole del C.N.R., Milano, Italy
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Abstract
Condensation of crystalline methyl 2-azido-4,6-O-benzylidene-2-deoxy-beta-D-galactopyranoside with methyl (2,3,4-tri-O-acetyl-alpha-L-idopyranosyl bromide)uronate in dichloromethane, in the presence of silver triflate and molecular sieve, provided 54% of methyl 2-azido-4,6-O-benzylidene-2-deoxy-3-O-(methyl 2,3,4-tri-O-acetyl-alpha-L-idopyranosyluronate)-beta-D-galactopyranoside . The use of methyl (2,3,4-tri-O-acetyl-alpha-L-idopyranosyl trichloroacetimidate)uronate as glycosyl donor, in the presence of trimethylsilyl triflate, improved the yield to 68%. Regioselective opening of the benzylidene group with sodium cyanoborohydride followed successively by O-sulfation with the sulfur trioxide-trimethylamine complex, saponification, catalytic hydrogenolysis and selective N-acetylation gave the disodium salt of methyl 2-acetamido-2-deoxy-3-O-(alpha-L-idopyranosyluronic acid)-4-O-sulfo-beta-D-galactopyranoside. Condensation of methyl 2-azido-4,6-O-benzylidene-2-deoxy-beta-D-galactopyranoside with methyl (2,3,4-tri-O-acetyl-alpha-D-glucopyranosyl bromide)uronate in dichloromethane, in the presence of silver triflate and molecular sieve, gave methyl 2-azido-4,6-O-benzylidene-2-deoxy-3-O-(methyl 2,3,4-tri-O-acetyl-beta-D-glucopyranosyluronate)-beta-D-galactopryano side in 85% yield. The sequence already described then gave the disodium salt of methyl 2-acetamido-2-deoxy-3-O-(beta-D-glucopyranosyluronic acid)-4-O-sulfo-beta-D-galactopyranoside.
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Affiliation(s)
- A Marra
- Ecole Normal Supérieure, Laboratoire de Chimie, Paris, France
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Srivastava V, Hindsgaul O. Synthesis of the 3"-sulfate ester of beta-D-GalpNAc-(1----4)-beta-D-GlcpNAc-(1----2)-alpha-D-Manp. Carbohydr Res 1989; 185:163-9. [PMID: 2713871 DOI: 10.1016/0008-6215(89)84031-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- V Srivastava
- Department of Chemistry, University of Alberta, Edmonton, Canada
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Chiba T, Jacquinet JC, Sinaÿ P, Petitou M, Choay J. Chemical synthesis of l-iduronic acid-containing disaccharidic fragments of heparin. Carbohydr Res 1988. [DOI: 10.1016/0008-6215(88)85095-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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